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Siemens Cellular Engine

Migration fromMC35 to MC45

Version: V02 DocID: MC35_MC45_MIG_V02

Migration from MC35 to MC45

Migration from MC35 to MC45 16.4.2003 Page 2 of 39

Document Name: Migration from MC35 to MC45 Version: V02 Date: April 15, 2003 DocId: MC35_MC45_MIG_V02 General Notes Product is deemed accepted by recipient and is provided without interface to recipients products. The documentation and/or product are provided for testing, evaluation, integration and information purposes. The documentation and/or product are provided on an as is basis only and may contain deficiencies or inadequacies. The documentation and/or product are provided without warranty of any kind, express or implied. To the maximum extent permitted by applicable law, Siemens further disclaims all warranties, including without limitation any implied warranties of merchantability, completeness, fitness for a particular purpose and non-infringement of third-party rights. The entire risk arising out of the use or performance of the product and documentation remains with recipient. This product is not intended for use in life support appliances, devices or systems where a malfunction of the product can reasonably be expected to result in personal injury. Applications incorporating the described product must be designed to be in accordance with the technical specifications provided in these guidelines. Failure to comply with any of the required procedures can result in malfunctions or serious discrepancies in results. Furthermore, all safety instructions regarding the use of mobile technical systems, including GSM products, which also apply to cellular phones must be followed. Siemens or its suppliers shall, regardless of any legal theory upon which the claim is based, not be liable for any consequential, incidental, direct, indirect, punitive or other damages whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of business information or data, or other pecuniary loss) arising out the use of or inability to use the documentation and/or product, even if Siemens has been advised of the possibility of such damages. The foregoing limitations of liability shall not apply in case of mandatory liability, e.g. under the German Product Liability Act, in case of intent, gross negligence, injury of life, body or health, or breach of a condition which goes to the root of the contract. However, claims for damages arising from a breach of a condition, which goes to the root of the contract, shall be limited to the foreseeable damage, which is intrinsic to the contract, unless caused by intent or gross negligence or based on liability for injury of life, body or health. The above provision does not imply a change on the burden of proof to the detriment of the recipient. Subject to change without notice at any time. The interpretation of this general note shall be governed and construed according to German law without reference to any other substantive law. Copyright Transmittal, reproduction, dissemination and/or editing of this document as well as utilization of its contents and communication thereof to others without express authorization are prohibited. Offenders will be held liable for payment of damages. All rights created by patent grant or registration of a utility model or design patent are reserved. Copyright © Siemens AG 2003



Contents

1 General info ................................................................................................................ 6

1.1 How to use this document ............................................................................... 6

1.2 Terms and Abbreviations ................................................................................. 7

2 Feature migration....................................................................................................... 9

2.1 General description .......................................................................................... 9

2.2 Certification and standards.............................................................................10

3 Hardware migration ..................................................................................................11

3.1 Introduction......................................................................................................11

3.2 Operating Modes..............................................................................................12

3.3 Interface/connectors comparison MC35/MC45..............................................13

3.4 Power Supply ...................................................................................................15 3.4.1 General ................................................................................................15 3.4.2 Power up / down scenarios...................................................................16 3.4.3 Automatic shutdown .............................................................................16 3.4.4 Power saving........................................................................................16 3.4.5 Undervoltage shutdown if no battery NTC is present............................17 3.4.6 Battery pack .........................................................................................18

3.5 RTC backup ......................................................................................................18

3.6 Control signals.................................................................................................19

3.7 Interfaces..........................................................................................................19 3.7.1 Interface overview ................................................................................19 3.7.2 Serial Interface .....................................................................................19 3.7.3 SIM card interface ................................................................................21 3.7.4 Antenna Interface .................................................................................21 3.7.5 Audio Interface .....................................................................................22

3.8 Electrostatic discharge....................................................................................27



3.9 Mechanical Dimensions ..................................................................................27

3.10 Mounting and installation................................................................................29

4 AT-Commands migration..........................................................................................30

4.1 General comments...........................................................................................30

4.2 List of jointly supported AT-commands.........................................................30 4.2.1 Standard V.25ter AT Commands..........................................................31 4.2.2 AT Commands for FAX ........................................................................32 4.2.3 AT Commands originating from GSM 07.07 .........................................32 4.2.4 AT commands originating from GSM 07.05 for SMS............................34 4.2.5 GPRS AT commands in accordance with GSM 07.07 ..........................35 4.2.6 AT commands for SIM Application Toolkit (GSM 11.14).......................35 4.2.7 Siemens defined AT commands for enhanced functions......................35

4.3 List of new AT-Commands ..............................................................................37 4.3.1 GPRS AT commands ...........................................................................37 4.3.2 Siemens defined AT commands for enhanced functions......................37

4.4 List of unsupported AT-Commands ...............................................................37

4.5 List of AT-Commands for V.25ter compatibility.............................................37

5 Firmware-Upgrade V01.04 to V02.04........................................................................38

5.1 New Commands ...............................................................................................38

5.2 Enhanced Commands......................................................................................38

5.3 Improved Command Features.........................................................................39



Figures Figure 1:MC35 Hirose FH12 connector ZIF.......................................................................13 Figure 2: Header Hirose DF12 series - B2B .........................................................................13 Figure 3:MC45 charging circuit.............................................................................................18 Figure 4: Serial interfaces for MC45.....................................................................................20 Figure 5: MC45 overview......................................................................................................22 Figure 6: The MC45 U.FL-R-SMT connector........................................................................22 Figure 7: Audio block diagram for MC45 ..............................................................................23 Figure 8: Audio block diagram for MC35 ..............................................................................24 Figure 9: Schematic of microphone inputs for MC45............................................................24 Figure 10: MC35 footprint.....................................................................................................27 Figure 11: MC45 footprint.....................................................................................................28 Figure 12: MC45 ground pad................................................................................................28

Tables Table 1: Glossary of terms .....................................................................................................7 Table 2: General description a) ..............................................................................................9 Table 3: General description b) ............................................................................................10 Table 4: Operating modes....................................................................................................12 Table 5: Electrical and mechanical characteristics for application interface connectors .......13 Table 6: Host interface PIN assignment ...............................................................................14 Table 7: Power supply signals..............................................................................................15 Table 8: Current consumption comparison...........................................................................16 Table 9: MC35/MC45 sleep modes summary.......................................................................17 Table 3-10: Wake up from SLEEP mode .............................................................................17 Table 11: Application interfaces grouped ..........................................................................19 Table 12: Serial interface .....................................................................................................21 Table 13: RF interface signals..............................................................................................22 Table 14: Audio interface signals .........................................................................................25 Table 15: MC35/MC45 Voice band characteristics ...............................................................26 Table 16: Standard V.25ter AT commands ..........................................................................31 Table 17: AT commands for FAX .........................................................................................32 Table 18: AT commands from GSM 07.07 ...........................................................................32 Table 19: AT commands for SMS ........................................................................................34 Table 20: GPRS AT commands ...........................................................................................35 Table 21: SIM Application Toolkit AT commands .................................................................35 Table 22: Siemens defined AT commands...........................................................................35 Table 23: New GPRS AT commands ...................................................................................37 Table 24: New Siemens defined AT commands...................................................................37 Table 25: V.254ter compatibility commands.........................................................................37



1 General info

1.1 How to use this document

The target audiences for this document are all categories of software and hardware developers, system integrators and expert end-users of SIEMENS GSM wireless modules. The content applies in particular to current users and developers whose applications are utilizing SIEMENS MC35 for their communications purposes. The aim of this document is to provide information and offer support in order to facilitate the transition towards a new generation of SIEMENS wireless modules, MC45 in this case. Information provided here is based on official technical manuals and released specifications for MC35 and MC45. The naming conventions used in this document follow those of source documentation. The authors presume the readers are already familiar with the contents of those manuals. The document presents migration issues in detail using comparison tables between the modules and covers topics ranging from hardware specifications to AT-command interface. Technical specifications and interfaces to GSM telecom services are described and compared in detail as well as all the relevant features. AT-command interface was given particular attention since it represents the main tool available to developers through which modules can be controlled. Available commands for both MC35 and MC45 are listed and classified according to their implementation within each of the modules. Differences in test, query and execution syntax as well as in available parameters are noted for each command. Commands are classified in three main groups: jointly supported commands, MC45 commands that are new with respect to MC35 and MC45 commands not supported by MC35. The differences between Firmware Version 01.04 and 02.04 will be described in chapter 5 .



1.2 Terms and Abbreviations

Table 1: Glossary of terms Abbreviation Term ADC Analog-to-Digital Converter AFC Automatic Frequency Control AGC Automatic Gain Control ARFCN Absolute Radio Frequency Channel Number ARP Antenna Reference Point ASIC Application Specific Integrated Circuit B Thermistor Constant BER Bit Error Rate BTS Base Transceiver Station CB or CBM Cell Broadcast Message CE Conformité Européene (European Conformity) CHAP Challenge Handshake Authentication Protocol CPU Central Processing Unit CS Coding Scheme CSD Circuit Switched Data CTS Clear to Send DAC Digital-to-Analog Converter dBm0 Digital level, 3.14dBm0 corresponds to full scale, see ITU G.711, A-law DCE Data Communication Equipment (typically modems, e.g. Siemens GSM engine) DCS 1800 Digital Cellular System, also referred to as PCN DRX Discontinuous Reception DSB Development Support Box DSP Digital Signal Processor DSR Data Set Ready DTE Data Terminal Equipment (typically computer, terminal, printer or, for example, GSM application) DTR Data Terminal Ready DTX Discontinuous Transmission EFR Enhanced Full Rate EGSM Enhanced GSM EMC Electromagnetic Compatibility ESD Electrostatic Discharge ETS European Telecommunication Standard FDMA Frequency Division Multiple Access FFC Flat Flexible Cable FR Full Rate GMSK Gaussian Minimum Shift Keying GPRS General Packet Radio Service GSM Global Standard for Mobile Communications HiZ High Impedance HR Half Rate I/O Input/Output IC Integrated Circuit IMEI International Mobile Equipment Identity ISO International Standards Organization ITU International Telecommunications Union kbps kbits per second LED Light Emitting Diode Li-Ion Lithium-Ion Mbps Mbits per second MMI Man Machine Interface MO Mobile Originated MS Mobile Station (GSM engine), also referred to as TE MSISDN Mobile Station International ISDN number MT Mobile Terminated NTC Negative Temperature Coefficient PAP Password Authentication Protocol PBCCH Packet Switched Broadcast Control Channel PCB Printed Circuit Board PCL Power Control Level PCN Personal Communications Network, also referred to as DCS 1800 PCS Personal Communication System



Abbreviation Term PDU Protocol Data Unit PLL Phase Locked Loop PPP Point-to-point protocol PSU Power Supply Unit R&TTE Radio and Telecommunication Terminal Equipment RAM Random Access Memory RF Radio Frequency RMS Root Mean Square (value) ROM Read-only Memory RTC Real Time Clock Rx Receive Direction SAR Specific Absorption Rate SELV Safety Extra Low Voltage SIM Subscriber Identification Module SMS Short Message Service SRAM Static Random Access Memory TA Terminal adapter (e.g. GSM engine) TDMA Time Division Multiple Access TE Terminal Equipment, also referred to as DTE Tx Transmit Direction UART Universal asynchronous receiver-transmitter URC Unsolicited Result Code USSD Unstructured Supplementary Service Data VSWR Voltage Standing Wave Ratio ZIF Zero Insertion Force FD SIM fixdialling phonebook LD SIM last dialling phonebook (list of numbers most recently dialed) MC Mobile Equipment list of unanswered MT calls (missed calls) ME Mobile Equipment phonebook ON Own numbers (MSISDNs) stored on SIM or ME RC Mobile Equipment list of received calls SM SIM phonebook



2 Feature migration Feature comparison for both modules introduced in the table below. Only main specifications are listed.

2.1 General description

Table 2: General description a)

Features Parameter MC35 MC45

Frequency bands: Dual-band EGSM 900, GSM1800 compliant to GSM Phase 2/2+

Tri-band EGSM 900, GSM 1800, GSM 1900 compliant to GSM Phase 2/2+

Output performance: Class 4 (2W) for EGSM900 Class 1 (1W) for GSM1800

Class 4 (2W) for EGSM900 Class 1 (1W) for GSM1800 and GSM 1900

GSM Class small MS Control: via AT commands

3V Supported SIM card: External SIM card holder has to be connected via SIM interface connector

Phonebook management:

SM, FD, LD, MC, RC, ON, ME

3.3 4.8 V 3.2 4.5 V Input voltage range: Automatic shutdown supported

Component mounting:

both sides single-side mounted

Dimensions: 54.5 x 36 x 6.65 mm 53 x 34 x 3,5 mm Weight: 16g 10g

-25°C to +55°C (normal operation) -20°C to +55°C (normal operation) +55C to +70°C (restricted operation) -29°C to -25°C (restricted operation)

+55C to +70°C (restricted operation) -25°C to -20°C (restricted operation)

Temperature conditions

Automatic shutdown supported Real time clock: Implemented Timer function: Programmable via AT command Antenna design: 50 antenna interface. Antenna connectors: GSC coaxial connector Hirose U.FL-R-SMT connector,

antenna pad Evaluation kit DSB 35 Support Box DSB 45 Support Box

Product Data

SIM Application Toolkit supported Half Rate (ETS 06.20) Full Rate (ETS 06.10)

Speech codec:

Enhanced Full Rate (ETS 06.50 / 06.60 / 06.80)

Audio

Audio interface: 2 x analogue audio interfaces (hands-free, supports echo

cancellation)

2 x analogue audio interfaces (hands-free, supports echo

cancellation), one digital audio interface (DAI)

General: Point-to-point MT and MO SMS SMS Cell Broadcast Text and PDU mode SMS MO Transmission of SMS: Over CSD or GPRS connections.

Preferred mode can be user-defined.

SMS

SMS storages SM+ME (25 places)



Table 3: General description b)

Features Parameter MC35 MC45

Supported services 2400 bps (V.22bis) 4800 bps (V.32) 9600 bps (V.32) 14400 bps (V.34) 2400 bps (V.110) 4800 bps (V.110) 9600 bps (V.110) 14400 bps (V.110)

USSD support Supported Connection element non-transparent mode

Data

Autobauding supported Fax Supported classes Group 3: Class 1, Class 2

Connectivity GPRS multi-slot class 8 GPRS mobile station class B

GPRS multi-slot class 10 GPRS mobile station class B

Data downlink transfer max. 85.6 kbps Data uplink transfer max. 21.4 kbps max. 42.8 kbps Coding scheme CS-1, CS-2, CS-3 and CS-4 PAP (Password Authentication Protocol)

Supported

Challenge Handshake Authentication Protocol

Supported

GPRS

Packet Switched Broadcast Control Channel (PBCCH)

Supported

RF interface: GSC antenna connector only Hirose U.FL-R-SMT antenna connector Antenna pad

Application interface: 40-pin ZIF connector 50-pin board-to-board connector Power supply: 3 additional contact pads available -

External interfaces

Battery charging: Charging circuit onboard No charging circuit onboard, only control lines and software

Baud rate: Fixed range (300bps...115kbps) Autobauding (1.2kbps...115kbps)

ASC0/ASC1 Fixed range (300bps...230kbps) ASC1 only Autobauding (1.2kbps...230kbps without 14.4kbps)

Local character framing: 8N1- fixed Multiplex mode: supported Flow control: RTS/CTS hardware handshake and

XON/XOFF software flow control RTS/CTS HW handshake and XON/XOFF SW flow control (ASC0 & ASC1)

Serial interface

2nd serial interface: Not supported ASC(1) - 4-wire serial interface. Supports RTS1/CTS1 HW handshake and XON/XOFF SW flow control.

Support of TTY/CTM

- TTY communication via GSM, CTM equipment can be connected to one of the three audio interfaces.

Software update Via serial and SIM interface

2.2 Certification and standards

Both MC35 and MC45 comply to the same directives and standards. For further information, please consult the HID manual.



3 Hardware migration This chapter contains information about the hardware set-up, installation instructions as well as physical properties for both modules. Hardware features are listed in comparison tables related to power supply, RF, audio, SIM and serial interfaces with functionality descriptions. All features, except RF, are available through common host application interface.

3.1 Introduction

MC45 is a tri-band band GSM/GPRS engine that works on the GSM bands 900/1800/1900MHz. MC45 features GPRS multi-slot class 10 and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4. It incorporates a set of new features compared to MC35 features listed in the following lines: Tri-Band GSM/GPRS engine (EGSM 900 MHz, DCS 1800 MHz and PCS 1900 MHz) Single side mounted (extremely slim) The application interface (board-to-board connector) consists of 50 pins Second serial interface (4-wire serial interface) Additional digital audio interface (DAI) Additional antenna pad Autobauding up to 230kBaud GPRS multi-slot class 10 MC45 is super-slim, single-side mounted, compact, tri-band GSM/GPRS OEM module for integration into industrial or mobile devices. Designed to easily provide radio connection for voice and data transmission it integrates seamlessly with a wide range of GSM/GPRS application platforms and is ideally suited to design and set up innovative cellular solutions with minimum effort.



3.2 Operating Modes

Various operating modes for MC35 and MC45 modules are listed in the table below. Table 4: Operating modes

Mode Function

MC35 MC45

Power-save modes set with AT+CFUN command GSM / GPRS SLEEP

The two CYCLIC SLEEP modes AT+CFUN=5 or 6 alternate activating and deactivating the AT interface to allow permanent access to all AT commands.

The CYCLIC SLEEP modes AT+CFUN=5, 6, 7 and 8 alternatingly activate and deactivate the AT interfaces to allow permanent access to all AT commands.

GSM IDLE

Software is active. Once registered to the GSM network, paging with BTS is carried out. The module is ready to send and receive.

GSM TALK

Connection between two subscribers is in progress. Power consumption depends on network coverage individual settings, such as DTX off/on, FR/EFR/HR, hopping sequences, antenna.

GPRS IDLE

Module is ready for GPRS data transfer, but no data is currently sent or received. Power consumption depends on network settings and GPRS configuration (e.g. multislot settings).

Normal operation

GPRS DATA

GPRS data transfer in progress. Power consumption depends on network settings (e.g. power control level), uplink / downlink data rates and GPRS configuration (e.g. used multislot settings).

POWER DOWN Normal shutdown after sending the AT^SMSO command. The Power Supply ASIC (PSU-ASIC) disconnects the supply voltage from the baseband part of the circuit. Only a voltage regulator in the PSU-ASIC is active for powering the RTC. Software is not active. The serial interfaces are not accessible. Operating voltage (connected to BATT+) remains applied.

Alarm mode Restricted operation launched by RTC alert function while the module is in Power Down mode. Module will not be registered to GSM network. Limited number of AT commands is accessible. If application is battery powered: No charging functionality in Alarm mode.

Charge-only mode Limited operation for battery powered applications. Enables charging while engine is detached from GSM network. Limited number of AT commands is accessible. There are several ways to launch Charge-only mode: From Power Down mode: Connect charger to POWER lines when engine was powered down by

AT^SMSO. From Normal mode: Connect charger to POWER lines, then enter AT^SMSO.

Charge mode during normal operation

Normal operation (SLEEP, IDLE, TALK, GPRS IDLE, GPRS DATA) and charging running in parallel. Charge mode changes to Charge-only mode when the module is powered down before charging has been completed.



3.3 Interface/connectors comparison MC35/MC45

Both devices (MC35 and MC45) are equipped with an application interface connector that connects to the cellular application platform. The host interface incorporates several sub-interfaces described in the following chapters of this document. MC35 and MC45 do not have the same type of connector. MC35 device uses a Hirose FH12-40S 0.5 SH (40 pins) while MC45 uses Hirose DF12 connector (50 pins).

Figure 1:MC35 Hirose FH12 connector ZIF Figure 2: Header Hirose DF12 series - B2B

Table 5: Electrical and mechanical characteristics for application interface connectors

Parameter MC35 Connector Specification (40-pin ZIF connector)

MC45 Connector Specification (50-pin board-to-board connector)

Number of Contacts 40 50

Voltage 50V

Current Rating 0.4A max per contact 0.3A max per contact

Resistance 0.05Ω per contact

Dielectric Withstanding Voltage 150V RMS AC for 1min 500V RMS min

Operating Temperature -40°C...+85°C -40°C...+125°C

Contact Material phosphor bronze finish: solder plating phosphor bronze (surface gold plated)

Insulator Material PPS, deep brown / Polyamide, beige PA, beige natural

Maximum connection cycles 20 (@ 50mΩmax) 50

Stacking height N/A 3.0 mm; 3.5 mm; 4.0 mm; 5.0 mm

Insertion force N/A 21.8N

Withdrawal force 1st N/A 10N

Withdrawal force 50th N/A 10N

FFC/FPC Thickness 0.3mm ±0.05mm (0.012" ±0.002") N/A

Cable FFC (Flat Flexible Cable), max. length 200mm from SIM interface

Modules connect to the application platform over the host interface (MC35 via 40- pin ZIF and MC45 via 50-pin board-to-board connector). This comprises data, audio and power supply. Compared to MC35, MC45 device has an additional set of pins on its 50-pin board-to-board connector designed for:



Second SERIAL interface (4 pins) Digital Audio Interface Charging conrol lines (without circuit)

The positions of pins for MC45 are not the same as for the MC35 device. The following table shows a pin position overview for both devices. Values for device signals are compared in respective interface chapters. Table 6: Host interface PIN assignment

MC35 MC45 Pin No.

Function Signal Name Function MC45 Signal Name

1 Power supply VBATT+ SIM CCCLK 2 Power supply VBATT+ SIM CCVCC 3 Power supply VBATT+ SIM CCIO 4 Power supply VBATT+ SIM CCRST 5 Power supply VBATT+ SIM CCIN 6 Ground Ground SIM CCGND 7 Ground Ground Digital Audio RXDAI 8 Ground Ground Digital Audio TFSDAI 9 Ground Ground Digital Audio SCLK 10 Ground Ground Digital Audio TXDAI 11 Charger POWER Digital Audio RFSDAI 12 Charger POWER Battery Temperature BATT_TEMP 13 External supply voltage VDD Synchronization SYNC 14 Battery Temperature ACCU_TEMP ASC1 /RXD1 15 Ignition /IGT ASC0 /RXD0 16 Serial interface /DSR0 ASC1 /TXD1 17 Serial interface /RING ASC0 /TXD0 18 Serial interface /RxD0 RTC Backup VDDLP 19 Serial interface /TxD0 Charger control POWER 20 Serial interface /CTS0 Charger control CHARGE 21 Serial interface /RTS0 Ground GND 22 Serial interface /DTR0 Ground GND 23 Serial interface /DCD0 Ground GND 24 SIM CCIN Ground GND 25 SIM CCRST Ground GND 26 SIM CCIO Power supply BATT+ 27 SIM CCCLK Power supply BATT+ 28 SIM CCVCC Power supply BATT+ 29 SIM CCGND Power supply BATT+ 30 RTC Backup VDDLP Power supply BATT+ 31 Power Down /PD External supply voltage VDD 32 Synchronization SYNC ASC0 /RING0 33 Analog Audio EPP2 ASC0 /DSR0 34 Analog Audio EPN2 ASC0 /RTS0 35 Analog Audio EPP1 ASC0 /DTR0 36 Analog Audio EPN1 ASC1 /RTS1 37 Analog Audio MICP1 ASC0 /CTS0 38 Analog Audio MICN1 ASC1 /CTS1 39 Analog Audio MICP2 ASC0 /DCD0 40 Analog Audio MICN2 Power Down /EMERGOFF 41 Ignition /IGT 42 Analog Audio Ground GND 43 Analog Audio MICN1 44 Analog Audio MICP1 45 Analog Audio MICP2 46 Analog Audio MICN2 47 Analog Audio EPN1 48 Analog Audio EPP1 49 Analog Audio EPP2 50

Pins 41-50 not available for MC35!

Analog Audio EPN2



3.4 Power Supply

3.4.1 General

MC35 and MC45 need to connect to the power supply. Power supply has to be a single voltage source at Power Supply pins. Beyond that, the power supply must be able to account for increased current consumption if the module is exposed to inappropriate conditions. compared to MC35, MC45 has no additional contact pads for power supply

Table 7: Power supply signals

General

Feature MC35 MC45

Input voltage range: VI = 3.3V to 4.8V Inom ≈ 2A, during transmit burst The minimum operating voltage must not fall below 3.3 V, not even in case of voltage drop.

VI = 3.2V to 4.5V Inom ≈ 2A, in burst The minimum operating voltage must not fall below 3.2 V, not even in case of voltage drop.

Options of connecting the power supply:

Over the ZIF connector Contact pads located on the MC35 PCB. Both options can be used in parallel. (Provides 3 additional nickel gold plated copper power pads NiAu on the RF side: VBATT+, GND, ACCU_TEMP. The use of these pads is optional. )

Over the board-to-board connector

External supply voltage: (via VDD pin) Can be used, for example, to connect a level converter or a pull-up resistor. Not recommended for components operated by pulse current. If unused keep pin open.

IDLE / TALK mode: Vout = 2.9V; ±3% @ 70mA; VBATT+ = 4.2V and Tamb,typ = 25°C Vout = 2.9V; ±3% @ 20mA; VBATT+ = 4.8V and Tamb,typ = 25°C Imax = 70mA Power Down mode: Vout = 0V Cload,max,extern = 1µF

IDLE / TALK mode: Vout = 2.9V; ±3% @ 10mA; VBATT+ = 4.5V and Tamb,typ = 25°C Imax = 10mA Power Down mode: Vout = 0V Cload,max,extern = 1µF

Ignition: This line must be driven low by an Open Drain or Open Collector driver

Rpullup = 200k. Vlow,max = 0.45V @ Iout = 10µA tlow >= 100ms Signal: falling edge and hold for tlow

RI ≈ 100k, CI ≈ 1nF VILmax = 0.5V @ Imax =-20µA VOpenmax = 2.3V tlow >= 100ms Signal: falling edge and hold for tlow

Emergency shutdown:

(Watchdog)

This line must be driven by an Open Drain or Open Collector driver. Emergency shutdown deactivates the modules power supply.

via /PD

RI ≈ 100k, CI ≈ 1nF VILmax = 0.45V at Imax = 0.1mA VOpenmax = 2.3V

via /EMERGOFF

RI ≈ 22k, VILmax = 0.5V at Imax = -100A VOpenmax = 2.73V

Synchronization: Indication of increased current consumption during uplink transmission burst

VOLmax = 0.2V @ I = 0.1mA VOHmin = 2.25V @ I = -0.1mA VOHmax = 2.76V

VOLmax = 0.2V at I = 1mA VOHmin = 2.35V at I = -1mA VOHmax = 2.73V

Power saving: Supported trough AT+CFUN Functionality levels <fun>=0, 5 or 6

Supported trough AT+CFUN Functionality levels <fun>=0, 5, 6, 7 and 8



Table 8: Current consumption comparison

Current consumption (typical)

Device Talk mode (during TX

burst)

Talk mode (average)

IDLE mode

IDLE GPRS mode

DATA GPRS mode

SLEEP mode (depending on network

configuration)

Power Down mode

MC35 2A

EGSM 900 / 300mA

GSM 1800 / 270mA

EGSM 900 / 15mA

GSM 1800 / 15mA

EGSM 900 / 15mA

GSM 1800 / 15mA

(4Rx, 1Tx) EGSM 900 / 360mA GSM 1800 / 330mA

3mA 50A

(4Rx, 1Tx) EGSM 900 / 360mA

GSM 1800 /1900 330mA

MC45 2A

EGSM 900 / 300mA

GSM 1800 /1900 270mA

EGSM 900 / 25mA

GSM 1800 /1900 25mA

EGSM 900 / 25mA

GSM 1800 /1900 25mA

(3Rx, 2Tx) EGSM 900 /1900

590mA GSM 1800 /1900

540mA

3mA 50A

3.4.2 Power up / down scenarios

MC35 and MC45 are fully compatible with regards to the power up / down procedures. For further information, please consult the HW manuals.

3.4.3 Automatic shutdown

To ensure proper operation of all assemblies under varying conditions, such as temperature, input voltage, transmission power etc., both MC35 and MC45 feature protection elements for automatic shutdown. Automatic shutdown takes effect if: the MC35/MC45 board is exceeding the critical limits of overtemperature or undertemperature the battery is exceeding the critical limits of overtemperature or undertemperature in a battery application, undervoltage is detected

3.4.3.1 Temperature dependent shutdown The board temperature is constantly monitored by an internal NTC resistor located on the PCB. The NTC that detects the battery temperature must be part of the battery pack circuit as described in the manual. The values detected by NTC resistor are measured directly on the board and the battery and are therefore, not fully identical with the ambient temperature. For further information, please consult the HID manuals.

3.4.4 Power saving

SLEEP mode reduces the functionality to a minimum and, thus, minimizes the current consumption to the lowest level. SLEEP mode is set with the AT+CFUN command that provides the choice of the functionality levels. Further instructions of how to use AT+CFUN can be found in the HW manual.



Table 9: MC35/MC45 sleep modes summary

Device MC35 MC45

No power saving (AT+CFUN=1)

The functionality level <fun>=1 is where power saving is switched off. This is the default after startup.

NON-CYCLIC SLEEP mode (AT+CFUN=0)

If level 0 has been selected (AT+CFUN=0), the serial interface is blocked. The module shortly deactivates power saving to listen to a paging message sent from the base station and then immediately resumes power saving. Level 0 is called NON-CYCLIC SLEEP mode, since the serial interface is not alternatingly made accessible as in CYCLIC SLEEP mode.

CYCLIC SLEEP mode The functionality levels AT+CFUN=5 and AT+CFUN=6 are referred to as CYCLIC SLEEP modes.

The functionality levels AT+CFUN=5, AT+CFUN=6, AT+CFUN=7 and AT+CFUN=8 are referred to as CYCLIC SLEEP modes.

A wake-up event is any event that switches off the SLEEP mode and causes the device to return to full functionality. Definitions of the state transitions described in the following table: Yes = device exits SLEEP mode No = device does not exit SLEEP mode

Table 3-10: Wake up from SLEEP mode

Event AT+CFUN=0 AT+CFUN=1

AT+CFUN=5 or 6 AT+CFUN=1

AT+CFUN=7 or 8 AT+CFUN=1

MC35 MC45 MC35 MC45 MC45 Ignition line No No No /RTS0 or /RTS1 (falling edge) Yes No No

Unsolicited Result Code (URC)

Yes Yes No

Incoming voice or data call Yes Yes No

Any AT command (incl. outgoing voice or data call, outgoing SMS)

Not Possible (UART disabled) No No

Incoming SMS depending on mode selected by AT+CNMI: AT+CNMI=0,0 (= default, no indication of received SMS) AT+CNMI=1,1 (= displays URC upon receipt of SMS)

No

Yes

No

Yes

No

No

GPRS data transfer Not Possible (UART disabled) No No

RTC alarm Yes Yes No AT+CFUN=1 Not Possible (UART

disabled) Yes Yes

3.4.5 Undervoltage shutdown if no battery NTC is present

Whenever the supply voltage falls below the specified value the module will present the URC

^SBC: Undervoltage In case of MC35 the URC will be displayed only once and switch off without sending any further messages. In case of MC45 the URC will appear several times before the module switches off.



3.4.6 Battery pack

For some applications the use of a battery pack may be required. MC35 and MC45 can be powered from a Li-Ion battery Migration from MC35 to TC45 has no on-board charging circuit. To benefit from the implemented charging management you are required to install a charging circuit within your application. In this case, Migration from MC35 to TC45 needs to be powered from a Li-Ion battery pack, e.g. as specified in MC45 HW manual. The module only delivers, via its POWER line and CHARGE line, the control signals needed to start and stop the charging process. The charging circuit should include a transistor and should be designed as illustrated in the next figure. A list of parts recommended for the external circuit is given in in MC45 HW manual. Figure 3:MC45 charging circuit

to BATT+

Input fromcharger(5.5V - 8V)under load

CHARGE

470R 1SS355

CRS04

3k3100nF 10k

SI3441DV

4V31/5 ESDA6V1-5W6pcb spark

gap

to POWER

BATT_TEMP

1/5 ESDA6V1-5W6

As it was mentioned before the MC45 has no on board circuit. If the external charging circuit follows the recommendation of the above Figure 5, the charging process will support trickle charging and processor controlled fast charging. For this solution, the fast charging current provided by the charger or any other external source must be limited to 500mA. The same battery pack is recommended for both devices: MC35 and MC45. Please consult the MC45 HW manual for a more detailed specification.

3.5 RTC backup

MC35 and MC45 are fully compatible with regards to internal Real Time Clock. For further information, please consult the HW manuals.



3.6 Control signals

Both MC35 and MC45 have identical control signals, except the charging (no internal circuit on MC45), the second serial interface and the SYNC behavior in 2TX mode. For further information, please consult the HW manuals.

3.7 Interfaces

Tables below list available interfaces per device.

3.7.1 Interface overview

Table 11: Application interfaces grouped

MC35 (40-pin ZIF connector) MC45 (50-pin board-to-board connector)

Power interface Serial interface SIM interface Two audio interfaces (balanced microphone inputs,

both with feeding, and balanced outputs) Antenna interface

Power interface Serial interface (main) Second serial interface SIM interface Two audio interfaces (balanced microphone inputs, one

with feeding, and balanced outputs) One digital audio interface Antenna interface Charge interface

3.7.2 Serial Interface

This chapter describes the data interfaces of both devices MC35 and MC45. The data interface for both modules operates at low CMOS voltage level (referenced to Vreg2= 2.65V) Compared to MC35 the MC45 offers a second serial interface. Both interfaces are implemented as a serial asynchronous transmitter and receiver conforming to ITU-T RS-232 Interchange Circuits DCE. Both device interfaces are configured for 8 data bits, no parity and 1 stop bit. The MC35 can be operated at bit rates from 300bps to 115bps, the MC45 up to 230kbps. Autobauding is only selectable on ASC(1) with MC45 and supports the following bit rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400 bps. XON/XOFF software flow control can be used on both device interfaces.



GSM module Application

/TXD

/RXD/RTS

/CTS

/RING

/DCD

/DSR

/DTR

/TXD

/RXD/RTS

/CTS

1st s

eria

l int

erfa

ce

(DTE)(DCE)

2nd s

eria

l int

erfa

ce

ASC0

inte

rface

ASC1

inte

rface

/TXD0

/RXD0/RTS0

/CTS0

/RING0

/DCD0

/DSR0

/DTR0

/TXD1

/RXD1

/RTS1

/CTS1

Figure 4: Serial interfaces for MC45

The second serial interface present with MC45 includes only the data lines /TXD1 and /RXD1 plus /RTS1 and /CTS1 for hardware handshake. This interface is intended for voice calls, GPRS services and for controlling the GSM engine with AT commands. It is not suited for CSD call, fax calls and Multiplex mode. When a PPP connection is in progress, no URCs can be displayed. As a result, an incoming call or any other type of URC can only be indicated after the PPP connection was terminated.



Table 12: Serial interface

Serial interface

Feature MC35 MC45

Type: Serial asynchronous transmitter and receiver conforming to Interchange Circuits DCE. Signal level ASC0

Output: Ri = 1k (serial resistor) Vout,low,max = 0.2V @ I = 0.1mA Vout,high,min = 2.25V @ I = -0.1mA Vout,high,max = 2.76V Input: Ri _ 1M. Vin,low,min = -0.3V, Vi,l,max = 0.5V Vin,high,min = 1.95V, Vi,h,max=3.3V

Vout,low,max = 0.2V at I = 1mA Vout,high,min = 2.35V at I = -1mA Vout,high,max = 2.73V Vin,low,max = 0.5V Vin,high,min = 1.95V, Vin,high,max=3.3V /DTR0, RTS0: Imax = -90µA at Vin = 0V

Signal level Second serial interface ASC1

N/A

VOLmax = 0.2V at I = 1mA VOHmin = 2.35V at I = -1mA VOHmax = 2.73V VILmax = 0.5V VIHmin = 1.95V, VIHmax=3.3V IImax = -90µA at VIN = 0V

Serial interface Pin 19 /TXD0

Vin,low,min = -0.3V, Vi,l,max = 0.5V Vin,high,min = 2,01V @ additional consumption of 60µA for 350ms Vi,h,max=3.3V

/TXD0: Imax = -30µA at VIN = 0V

Local character framing: fixed to 8 data bits, no parity and 1 stop bit Selectable baud rate Fixed range (300bps...115kbps)

Autobauding (1.2kbps...115kbps) Fixed range (300bps...230kbps) Autobauding (1.2kbps230kbps without 14.4kbps)

Flow Control RTS0 / CTS0 and/or software flow control (XON / XOFF).

3.7.3 SIM card interface

There were no changes on the integrated SIM interface between MC35 and MC45. For further information, please refer to the respective HW manuals.

3.7.4 Antenna Interface

3.7.4.1 General

To suit the physical design of individual applications MC45 offers two alternative approaches to connecting the antenna: Recommended approach: U.FL-R-SMT antenna connector from Hirose assembled on the component side

of the PCB (top view on MC45). See MC45 HW manual for details. Antenna pad and grounding plane placed on the bottom side.



Figure 5: MC45 overview

The U.FL-R-SMT connector has been chosen as antenna reference point (ARP) for the Siemens reference equipment submitted to type approved MC45.

Figure 6: The MC45 U.FL-R-SMT connector

The antenna can be soldered also directly to the pad, or attached via contact springs. To help grounding the antenna, MC45 comes with a grounding plane located close to the antenna pad. The positions of both pads can be seen from MC45 HW manual.

Table 13: RF interface signals

RF interface general

Feature MC35 MC45

Antenna connector: GSC coaxial connector U.FL-R-SMT antenna connector Antenna pad

Interface type: GSM 900/1800 GSM 900/1800/1900

Max RF power: 2W [EGSM900] / 1W [GSM1800/GSM1900]

Min -102dBm [EGSM900, GSM1800] -102dBm [EGSM900, GSM1800,GSM1900]

Typ -106.5 [EGSM900]

-105.5 [GSM1800]

-105dBm [EGSM900, GSM1800,GSM1900]

RF sensitivity:

3.7.5 Audio Interface

MC45 comprises three audio interfaces available on the board-to-board connector:



Two analog audio interfaces, each with a balanced analog microphone input and a

balanced analog earpiece output. The second analog interface provides a supply circuit to feed an active microphone.

Serial digital audio interface (DAI) using PCM (Pulse Code Modulation) to encode analog voice signals into digital bit streams.

MC35 comprises two audio interfaces, each with an analog microphone input (with feeding) and an analog earpiece output. MC45 can connect up to three audio devices in any combination, all at the same time. Using the AT^SAIC command you can easily switch back and forth. MC45 and MC35 offer six audio modes which can be selected with the AT^SNFS command, no matter which of the interfaces is currently active. The electrical characteristics of the voiceband part vary with the audio mode. For example, sending and receiving amplification, sidetone paths, noise suppression etc. depend on the selected mode and can be altered with AT commands

Figure 7: Audio block diagram for MC45



Figure 8: Audio block diagram for MC35

On each MC45 audio interface you can use all audio AT commands specified to alter parameters. The only exception are the DAC and ADC gain amplifier attenuation <outBbcGain> and <inBbcGain> which cannot be modified when the digital audio interface is used, since in this case the DAC and ADC are switched off. Microphone circuit The MC45 interface1 has no microphone supply circuit and therefore, has an impedance of 50k. When connecting a microphone or another signal source to interface 1, two 100nF capacitors have to be added, one to each line. The MC45 second interface comes with a microphone supply circuit and can be used to feed an active microphone. It has an impedance of 2k. Both of the MC35 audio interfaces comes with a microphone supply circuit and can be used to feed an active microphone.

Figure 9: Schematic of microphone inputs for MC45



Table 14: Audio interface signals

Audio interface signals - PIN assignment with description

MC35 MC45 Signal name I/O

Description Parameters Description Parameters

EPP2 O EAR PLUS

EAR PLUS

EPN2 O EAR MINUS

Vomax = 3.7Vpp EAR MINUS

Vomax = 3.7Vpp

EPP1 O EAR PLUS

EAR PLUS

EPN1 O EAR MINUS

Vomax = 3.7Vpp EAR MINUS

Vomax = 3.7Vpp

MICP1 I MIC PLUS

MIC PLUS

MICN1 I MIC MINUS

Ri = 2k Vimax = 1.03Vpp

Vsupply = 2.65V ( 0V if off ), RDC = 4k

MIC MINUS

RI = 50k differential VImax = 1.03Vpp

Balanced microphone input. To be decoupled with 2 capacitors (CK = 100nF), if connected to a microphone or another device. If unused keep pins open

MICP2 I MIC PLUS

MIC PLUS

Anal

og A

udio

Int

erfa

ce

MICN2 I MIC MINUS



MIC MINUS



RFSDAI I NOT SUPPORTED WITH MC35 DAI signal

RXDDAI I NOT SUPPORTED WITH MC35 DAI signal

SCLK I NOT SUPPORTED WITH MC35 DAI signal

TFSDAI O NOT SUPPORTED WITH MC35 DAI signal

Dig

ital A

udio

Int

erfa

ce

TXDDAI O NOT SUPPORTED WITH MC35 DAI signal

VOLmax = 0.2V at I = 1mA VOHmin = 2.35V at I = -1mA VOHmax = 2.73V VILmax = 0.5V VIHmin = 1.95V, VIHmax=3.3V IImax = 330µA at VIN = 3.3V If unused keep pins open.



Characteristics of audio modes The electrical characteristics of the voiceband part depend on the current audio mode set with AT^SNFS command. Table 15: MC35/MC45 Voice band characteristics

Audio mode no.: (AT^SNFS) 1 2 3 4 5 6

Name

Default Handse

t

Basic Handsfree

Headset

User Handset

Plain Codec 1

Plain Codec 2

Purpose

DSB with

Votronic handset

Siemens Car Kit Portable

Siemens Headset

DSB with Individual handset

Direct access to

speech coder

Direct access to

coder

MC35 Fix

5 (30dB) 1 (-6dB)

Adjustable 2 (12dB) 1 (-6dB)



Adjustable 0 (0dB) 0 (0dB)


Gain settting via AT command. Defaults: inBbcGain outBbcGain

MC45 Fix

4 (24dB) 1 (-6dB)

2 (12dB) 1 (-6dB)





MICPn/MICNn EPPn/EPNn

MC35/MC45 n=1 n=2 n=2 n=1 n=1 n=2*

Power supply MC35/MC45

ON

ON

ON

ON

OFF

OFF

Sidetone MC35/MC45 ON - Adjustable Adjustable Adjustable Adjustable

Volume control MC35/MC45 OFF Adjustable Adjustable Adjustable Adjustable Adjustable

Limiter (receive) MC35/MC45 ON ON** ON ON - -

Compressor (receive)

MC35/MC45 - ON** - - - -

AGC (send) MC35/MC45 - - ON - - -

Echo control (send) MC35/

MC45 Suppres

sion

Cancellation +

suppresion - Suppression - -

MC35 Up to 10db Up to 10db 10db Up to 10db - - Noise

suppression***

MC45 - Up to 10db 10db - - -

MC35 12.5mV 48mV 11mV @ -3dBm0 due

to AGC 12.5 mV 315 mV 315 mV

MIC input signal for 0dBm0 @ 1024 Hz (default gain) MC45 23mV 58mV

7,5mV @ -3dBm0 due

to AGC 23 mV 315 mV 315 mV

MC35 275mV 120 mV

default @ max volume

270mV default @

max volume

275 mV default @

max volume

880mV

3.7 Vpp

880mV

3.7 Vpp

EP output signal in mVrms @0dBm0, 1024 Hz, no load (default gain); @ 3.14 dBm0

MC45 284mV 120 mV

default @ max volume

300mV default @

max volume

284 mV default @

max volume

895mV

3.7 Vpp

895mV

3.7 Vpp

mailto:11m V@ -3dBm0






Audio mode no.: (AT^SNFS) 1 2 3 4 5 6

MC35 27.7dB - dB

Affected by AGC, 9.3dB

@ 11mV (MIC)

27.7 dB -2.7dB @ sideTone = 81923

-2.7dB @ sideTone = 81923)

Sidetone gain at default settings

MC45 22,8dB - dB

Affected by AGC, 13dB @ 7,5mV

(MIC)

22,8 dB

-2.5dB @

sideTone = 8192

-2.5 dB @

sideTone = 8192

* Audio mode 5 and 6 are identical. With AT^SAIC, you can easily switch mode 5 to the second interface. Therefore, audio mode 6 is only kept for compatibility to earlier Siemens GSM products. ** Adaptive, receive volume increases with higher ambient noise level. *** In audio modes with noise reduction, the microphone input signal for 0dBm0 shall be measured with a sine burst signal for a tone duration of 5 seconds and a pause of 2 sec. The sine signal appears as noise and, after approx. 12 sec, is attenuated by the noise reduction by up to 10dB.

3.8 Electrostatic discharge

Please see the HID.

3.9 Mechanical Dimensions

The following figures provide an overview of the mechanical dimensions and design drawing for MC35 and MC45. MC45 is a single-side mounted device and thus much thinner compared to MC35.

Figure 10: MC35 footprint



Figure 11: MC45 footprint

Figure 12: MC45 ground pad



3.10 Mounting and installation

Appropriate installation and mounting to the host housing / enclosure is essential for reliable operation of the GSM engine. There are many ways to properly install MC45 in the host device. An efficient approach is to mount the MC45 PCB to a frame, plate, rack or chassis. Fasteners can be M1.6 or M1.8 screws plus suitable washers, circuit board spacers, or customized screws, clamps, or brackets. Screws must be inserted with the screw head on the bottom of the MC45 PCB. This is necessary to avoid contacting the shielding covers on top. In addition, the board-to-board connection can also be utilized to achieve better support. MC45 provides a number of ground pads. If the bottom of MC45 faces the holding device, only use the ground pads for the connection. To avoid short circuits ensure that the remaining sections of the MC45 PCB do not come into contact with he host device since there are a number of test points. The largest ground pad in the middle of the board can also be used to attach cooling elements, e.g. a heatsink or thermally conductive tape. Refer to HID manual for an overview on a variety of cooling elements. Particular attention should be paid to the test point TP 402. Placed beneath the large ground pad it has been added for manufacturing only. When the pad is used for grounding the unit or connecting a heat sink, extra care must be taken not to contact this test point. To prevent mechanical damage, be careful not to force, bend or twist the module. Be sure it is positioned flat against the host device. All the information you need to install an antenna is summarized in Chapter 6 of the MC45 HW manual. For snap-in concepts, please be aware that the PCB of MC45 is thinner than that of MC35.



4 AT-Commands migration AT Cellular command structure for MC45 incorporates that of MC35 with the added improvements and new features. Available commands for both MC45 and MC35 are listed and classified according to their implementation within each of the modules. The entire command set of MC35 is supported by MC45. Differences in test, query and execution syntax as well as in available parameters are noted for each command. Commands are classified in three main groups: jointly supported commands, commands new with respect to MC35 and MC35 commands not supported by MC45

4.1 General comments

MC45 feature highlights The commands below are either newly introduced or improvements: AT+CGREG: GPRS network registration status

GPRS AT commands in accordance with GSM 07.07 Command indicates the registration status of the module during a GPRS session.

AT^SMONC: Cell Monitoring Siemens defined AT commands for enhanced functions Command was re-introduced inMC45, based on TC35, not available with MC35.

AT^SMONG: GPRS Monitor Siemens defined AT commands for enhanced functions Will display GPRS specific Cell info either on request or periodically

AT^SPBD: Delete the given Phonebook Siemens defined AT commands for enhanced functions Deletes entire phonebook contents with a single command.

AT^SSMSS: Set Short Message Storage Sequence Siemens defined AT commands for enhanced functions Command controls addressing of the logical SMS storage "MT".

Please find the complete list of new MC45 commands in Chapter 5.3.

4.2 List of jointly supported AT-commands

AT-commands listed in the tables below are supported by both MC45 and TC35. Default settings for command parameters, however, may be different. NOTE: Many commands are available only after the PIN has been entered. For a full list, please refer to respective AT reference manuals.



4.2.1 Standard V.25ter AT Commands

Table 16: Standard V.25ter AT commands

# AT Command

1 A/ Repeat previous command line 2 +++ Switch from data mode or PPP online mode to command mode 3 AT\Qn Flow control 4 ATA Answer a call 5 ATD Mobile originated call to dial a number 6 ATD><mem><n> Originate call to phone number <n> in memory <mem> 7 ATD><n> Originate call to phone number selected from active memory 8 ATD><str> Originate call to phone number in memory with corresponding field 9 ATDI Mobile originated call to dialable ISDN number <n> 10 ATDL Redial last telephone number used 11 ATE Enable command echo 12 ATH Disconnect existing connection 13 ATI Display product identification information 14 ATI[value] Display additional identification information 15 ATL Set monitor speaker loudness 16 ATM Set monitor speaker mode 17 ATO Switch from command mode to data mode / PPP online mode 18 ATQ Set result code presentation mode 19 ATP Select pulse dialling 20 ATS0 Set number of rings before automatically answering the call 21 ATS3 Write command line termination character 22 ATS4 Set response formatting character 23 ATS5 Write command line editing character 24 ATS6 Set pause before blind dialling 25 ATS7 Set number of seconds to wait for connection completion 26 ATS8 Set number of seconds to wait for comma dial modifier 27 ATS10 Set disconnect delay after indicating the absence of data carrier 28 ATS18 Extended error report 29 ATT Select tone dialling 30 ATV Set result code format mode 31 ATX Set CONNECT result code format and call monitoring 32 ATZ Set all current parameters to user defined profile 33 AT&C Set circuit Data Carrier Detect (DCD) function mode 34 AT&D Set circuit Data Terminal Ready (DTR) function mode 35 AT&F Set all current parameters to manufacturer defaults 36 AT&S Set circuit Data Set Ready (DSR) function mode 37 AT&V Display current configuration

Differing parameters MC35

N/A

MC45 +CGSMS setting listed in all configurations (with or w/o PIN authentication, for all MUX channels). However,+CGSMS cannot be stored in user profile.

38 AT&W Store current configuration to user defined profile Differing parameters MC35

AT\Qn is NOT stored to user profile.

MC45 AT\Qn is stored to user profile.

39 AT+GCAP Request complete TA capabilities list 40 AT+GMI Request manufacturer identification 41 AT+GMM Request TA model identification 42 AT+GMR Request TA revision identification of software status 43 AT+GSN Request TA serial number identification (IMEI) 44 AT+ILRR Set TE-TA local rate reporting

Differing parameters MC35

N/A

MC45 Local data rate of 230400bps available.

45 AT+IPR Set fixed local rate Minor differences in syntax wording, differing parameters MC35

N/A

MC45 Fixed local data rate of 230400bps available.



4.2.2 AT Commands for FAX

Table 17: AT commands for FAX

# AT Command

46 AT+FBADLIN Bad Line Threshold 47 AT+FBADMUL Error Threshold Multiplier 48 AT+FBOR Query data bit order 49 AT+FCIG Query or set the Local polling id 50 AT+FCLASS Fax: Select, read or test service class 51 AT+FCQ Copy Quality Checking 52 AT+FCR Capability to receive 53 AT+FDCC Query or set capabilities 54 AT+FDFFC Data Compression Format Conversion 55 AT+FDIS Query or set session parameter 56 AT+FDR Begin or continue phase C data reception 57 AT+FDT Data Transmission 58 AT+FET End a page or document 59 AT+FK Kill operation, orderly FAX abort 60 AT+FLID Query or set the Local Id setting capabilities 61 AT+FMDL Identify Product Mode 62 AT+FMFR Request Manufacturer Identification 63 AT+FOPT Set bit order independently 64 AT+FPHCTO DTE Phase C Response Timeout 65 AT+FREV Identify Product Revision 66 AT+FRH Receive Data Using HDLC Framing 67 AT+FRM Receive Data 68 AT+FRS Receive Silence 69 AT+FTH Transmit Data Using HDLC Framing 70 AT+FTM Transmit Data 71 AT+FTS Stop Transmission and Wait 72 AT+FVRFC Vertical resolution format conversion

4.2.3 AT Commands originating from GSM 07.07

Table 18: AT commands from GSM 07.07

# AT Command

73 AT+CACM Accumulated call meter (ACM) reset or query 74 AT+CALA Set alarm time 75 AT+CAMM Accumulated call meter maximum (ACMmax) set or query 76 AT+CAOC Advice of Charge information 77 AT+CBST Select bearer service type 78 AT+CCFC Call forwarding number and conditions control 79 AT+CCLK Real Time Clock 80 AT+CCUG Closed User Group 81 AT+CCWA Call waiting 82 AT+CEER Extended error report

Differing implementation and additional command examples MC35

N/A MC45

+CEER extended to include error reports on: the last failure to set up a call (both mobile originated or terminated) the last call release the last unsuccessful GPRS attach or unsuccessful PDP context activation the last GPRS detach or PDP context deactivation the last failure to modify a call by using Supplementary Services the last failed attempt to activate, register, deactivate or deregister a

Supplementary Service +CEER also not available for data calls, ATS18=1 can be used instead.

83 AT+CFUN Set phone functionality Additional parameters and notes



# AT Command

MC35 Two additional CYCLIC SLEEP modes: N/A Note: If SLEEP mode (<fun>=0, 5, or 6) is activated while a circuit-switched call is in progress, this call will immediately be terminated.

MC45 Two additional CYCLIC SLEEP modes available: 7 CYCLIC SLEEP mode: In this mode, the serial interface is shortly enabled during paging. If characters are recognized on the serial interface, the ME stays active for 2 seconds after the last character was sent or received. ME exits SLEEP mode only if AT+CFUN=1 is entered. 8 CYCLIC SLEEP mode: In this mode, the serial interface is shortly enabled during paging. If characters are recognized on the serial interface, the ME stays active for 10 minutes after the last character was sent or received. ME exits SLEEP mode only if AT+CFUN=1 is entered. Note: When a circuit-switched call is in progress, <fun>=7 or 8 can be activated without terminating the call. However, setting <fun>=0, 5 or 6 during a circuit-switched call immediately disconnects this call. If both serial interface ASC(1) and ASC(1) are connected, SLEEP modes takes effect on both of them.

84 AT+CGMI Request manufacturer identification 85 AT+CGMM Request model identification 86 AT+CGMR Request revision identification of software status 87 AT+CGSN Request product serial number identification (IMEI) identical to GSN 88 AT+CHLD Call hold and multiparty 89 AT+CHUP Hang up call 90 AT+CIMI Request international mobile subscriber identity 91 AT+CIND Indicator control 92 AT+CLCC List current calls of ME

Differing parameter implementation MC35

N/A

MC45 <alpha> - alphanumeric representation in phonebooks: The maximum displayed length of <alpha> is 16 characters. If <alpha> has more than 16 characters, only the first 15 characters will be displayed. To indicate an overflow, a special character will be used for the 16th character: This will be a space if the character set selected with +CSCS is "GSM", or "E400" if the character set is "UCS2".

93 AT+CLCK Facility lock Differing parameters, wording of command syntax description and notes MC35

Additional <fac> value: "CS" Keypad lock (not supported since keypad cannot be directly connected to the GSM engine).

MC45 N/A

94 AT+CLIP Calling line identification presentation

95 AT+CLIR Calling line identification restriction (by *# sequence)

96 AT+CLVL Loudspeaker volume level 97 AT+CMEE Report mobile equipment error 98 AT+CMER Mobile equipment event reporting 99 AT+CMUT Mute control

100 AT+CMUX Enter multiplex mode Differences regarding the restricted commands; listed for both modules in accompanying chapter

"Restricted use of AT commands in Multiplex mode" MC35

-

MC45 On the ASC(1) interface, MC45 supports Multiplex mode according to the GSM 07.10 Multiplexer Protocol. The second interface ASC(1) is not capable of Multiplex mode (See Chapter 4.28.2).

101 AT+COPN Read operator names 102 AT+COPS Operator selection 103 AT+CPAS Mobile equipment activity status 104 AT+CPBR Read current phonebook entries 105 AT+CPBS Select phonebook memory storage

Differing parameter implementation; minor differences in wording of command syntax description and notes

MC35 MC45



# AT Command

<storage> "ME" ME phonebook. Storage positions 1-50. Note: This command can be used right after power-on to get selected <storage>. Since data need to be loaded from the SIM, values of <used> and <total> might not be available for the first 20 seconds.

<storage> "ME" ME phonebook. Storage positions 1-250. Note: This command can be used only after the phonebook data from the SIM have been read successfully for the first time. Reading starts after successful SIM authentication has been performed, and may take up to 30 seconds depending on the SIM used. While the read process is in progress, an attempt to use any of the phonebook commands will result in "+CME Error: 14" (SIM busy).

106 AT+CPBW Write phonebook entry 107 AT+CPIN Enter PIN 108 AT+CPIN2 Enter PIN2 109 AT+CPUC Price per unit and currency table 110 AT+CPWD Change password 111 AT+CR Service reporting control 112 AT+CRC Set Cellular Result Codes for incoming call indication 113 AT+CREG Network registration 114 AT+CRLP Select radio link protocol param. for orig. non-transparent data call 115 AT+CRSM Restricted SIM access 116 AT+CSCS Set TE character set 117 AT+CSNS Single Numbering Scheme 118 AT+CSQ Signal quality 119 AT+CSSN Supplementary service notification 120 AT+CUSD Unstructured supplementary service data 121 AT+VTD=<n> Tone duration 122 AT+VTS DTMF and tone generation (<Tone> in 0-9, *, #, A, B, C, D) 123 AT+WS46 Select wireless network

4.2.4 AT commands originating from GSM 07.05 for SMS

Table 19: AT commands for SMS

# AT Command

124 AT+CMGC Send an SMS command 125 AT+CMGD Delete SMS message 126 AT+CMGF Select SMS message format 127 AT+CMGL List SMS messages from preferred store 128 AT+CMGR Read SMS message 129 AT+CMGS Send SMS message 130 AT+CMGW Write SMS message to memory 131 AT+CMSS Send SMS message from storage 132 AT+CNMA New SMS message acknowledge to ME/TE, only phase 2+ 133 AT+CNMI New SMS message indications 134 AT+CPMS Preferred SMS message storage 135 AT+CSCA SMS service centre address 136 AT+CSCB Select cell broadcast message 137 AT+CSDH Show SMS text mode parameters 138 AT+CSMP Set SMS text mode parameter 139 AT+CSMS Select Message Service



4.2.5 GPRS AT commands in accordance with GSM 07.07

Table 20: GPRS AT commands

# AT Command

140 AT+CGACT PDP context activate or deactivate 141 AT+CGATT GPRS attach and detach 142 AT+CGDATA Enter data state 143 AT+CGDCONT Define PDP Context 144 AT+CGQMIN Quality of Service Profile (Minimum acceptable) 145 AT+CGQREQ Quality of Service Profile (Requested) 146 AT+CGSMS Select service for MO SMS messages 147 AT^SGAUTH Set type of authentication for PPP connection 148 ATD*99# Request GPRS service 149 ATD*98# Request GPRS IP service 150 ATH Manual rejection of a network request for PDP context activation

4.2.6 AT commands for SIM Application Toolkit (GSM 11.14)

Table 21: SIM Application Toolkit AT commands

# AT Command

153 AT^SSTA Remote-SAT Interface Activation 154 ^SSTN Remote-SAT Notification 155 AT^SSTGI Remote-SAT Get Information 156 AT^SSTR Remote-SAT Response

4.2.7 Siemens defined AT commands for enhanced functions

Table 22: Siemens defined AT commands

# AT Command

157 AT+CXXCID Display card ID (identical to AT^SCID) 158 AT^MONI Monitor idle mode and dedicated mode

Differing parameters, implementation and syntax wording

MC35

PLMN only

MC45 PLMN is divided into MCC and MNC, differing statuses

159 AT^MONP Monitor neighbour cell

Differing parameters

MC35

PLMN only

MC45 PLMN is divided into MCC and MNC, differing statuses

160 AT^SACM Advice of charge and query of ACM and ACMmax 161 AT^SBC Battery charge and charger control

Differing parameters

MC35 Enter the current consumption of your application in mA (0...5000). If used, the current provided over the by 2.9V VDD pin of the ZIF interface (maximum 70mA) must be added, too.

MC45 Enter the current consumption of your application in mA (0...5000). If used, the current provided over the by 2.9V VDD pin of the application interface (maximum 10mA) must be added, too.

162 AT^SCID Display SIM card identification number 163 AT^SCKS Set SIM connection presentation mode and query SIM connection status 164 AT^SCNI List Call Number Information 165 AT^SCTM Set critical operating temperature presentation mode or query temperature 166 AT^SDLD Delete the 'last number redial' memory 168 AT^SHOM Display Homezone 169 AT^SLCD Display Last Call Duration 170 AT^SLCK Facility lock



# AT Command

172 AT^SM20 Set M20 Compatibility 173 AT^SMGL List SMS messages from preferred storage 174 AT^SMGO Set or query SMS overflow presentation mode or query SMS overflow 177 AT^SMSO Switch off mobile station 178 AT^SMGR Read SMS message without set to REC READ 179 AT^SNFA Set or query microphone attenuation 180 AT^SNFD Set audio parameters to manufacturer default value 181 AT^SNFI Set microphone path parameters 182 AT^SNFM Mute microphone 183 AT^SNFO Set audio output (= loudspeaker path) parameter 184 AT^SNFPT Call progress tones 185 AT^SNFS Select audio hardware set 186 AT^SNFV Set loudspeaker volume 187 AT^SNFW Write audio setting in non-volatile store

Differing parameters and implementation

MC35 - Saved parameters: <inBbcGain>, <inCalibrate>, <outBbcGain>, <outCalibrate[0]> ... <outCalibrate[4]>,<sideTone>

MC45 - The audio profile saved with AT^SNFW includes the following parameters: AT^SNFI: <inBbcGain>, <inCalibrate> (or the equivalent AT^SNFA parameters) AT^SNFO: <outBbcGain>, <outCalibrate[0]> ... <outCalibrate[4]>, <side Tone> AT^SAIC: <io>,<mic>,<ep> Note that each time MC45 is restarted, audio mode 1 will be active by default. This requires to select the desired audio mode first, simply by using the AT^SNFS command. Then, all audio settings saved with AT^SNFW will be available.

188 AT^SPBC Search the first entry in the sorted telephone book 190 AT^SPBG Read entry from active telephone book via sorted index 191 AT^SPBS Steps the selected phonebook alphabetically 192 AT^SPIC Display PIN counter 193 AT^SPLM Read the PLMN list 194 AT^SPLR Read entry from the preferred operators list 195 AT^SPLW Write an entry to the preferred operators list

Minor differences in implementation

MC35 TA writes an entry to the SIM list of preferred operators at location number <index>. If <index> is given but <oper> is left out, the entry is deleted. If <oper> is given but <index> is left out, <oper> is inserted in the next free location.

MC45 TA writes an entry to the SIM list of preferred operators at location number <index>. If <index> is given but <oper> is left out, the entry is deleted.

196 AT^SPWD Change password for a lock 197 AT^SRTC Select, query, test ring tone parameter 198 AT^SSCONF SMS Configuration 199 AT^SSDA Set Display Availability 201 AT^SSYNC Configure SYNC Pin 202 AT^STCD Display Total Call Duration



4.3 List of new AT-Commands

New commands - supported exclusively by MC45.

4.3.1 GPRS AT commands

Table 23: New GPRS AT commands

# AT Command

144 AT+CGPADDR Show PDP address 147 AT+CGREG GPRS network registration status

4.3.2 Siemens defined AT commands for enhanced functions

Table 24: New Siemens defined AT commands

# AT Command

162 AT^SAIC Audio Interface Configuration 164 AT^SBV Battery / supply voltage 173 AT^SLMS List Memory Storage 177 AT^SMONC Cell Monitoring 178 AT^SMONG GPRS Monitor 191 AT^SPBD Delete the given Phonebook 202 AT^SSMSS Set Short Message Storage Sequence

4.4 List of unsupported AT-Commands

MC45 supports the entire MC35 AT command set.

4.5 List of AT-Commands for V.25ter compatibility

These commands return "OK" but have no functionality in both MC35 and MC45.

Table 25: V.254ter compatibility commands

# AT Command

1 ATL Set monitor speaker loudness 2 ATM Set monitor speaker mode 3 ATP Select pulse dialing 4 ATS1 READ-ONLY, INTERNAL USAGE 5 ATS2 Escape code sequence 6 ATS6 Set pause before blind dialing 7 ATS8 Set number of seconds to wait for comma dial modifier 8 ATS9 READ-ONLY, INTERNAL USAGE 9 ATS11-ATS17 READ-ONLY, INTERNAL USAGE

10 ATS19-ATS29 READ-ONLY, INTERNAL USAGE 11 ATT Select tone dialing



5 Firmware-Upgrade V01.04 to V02.04 The Firmware-Update to Version 02.04 offers additional Commands and improves the features of some Commands. For more informations please use the current Release Notes.

5.1 New Commands

AT command Brief description

AT^SGCONF Siemens defined GPRS command used to specify the length of LLC-PDU and to change the GPRS multislot class.

AT+CGANS Command used to manually respond to a network request for GPRS PDP context activation.

AT+CGAUTO Command used to enable or disable automatic response to a network request for GPRS PDP context activation.

AT^SIND Siemens defined command for extended indicator control. The major benefit over the standard command AT+CIND is that extra parameters are available for audio activities and for Voice Message indication according to the CPHS Phase 2 standard. Also, the handling of indicators is made easier, as with AT^SIND you can query the status or control the registration of all indicators supported by both commands.

AT^SCFG The AT^SCFG command serves to query or modify various MC45 parameters. In the current release of MC45 the command includes the following functions: - Activating or deactivating the usage of Adaptive Multi Rate (AMR) for

all operators or for selected operators - Activating or deactivating the ability of the RING line to indicate URCs

during IDLE or DATA mode on both serial interfaces. - Specifying whether URCs are to be indicated by a BREAK or by

activating the RING line when the TE-TA link is reserved.

5.2 Enhanced Commands


ATA The V.25ter command A used to accept a network request for a PDP context activation announced by the unsolicited result code RING.

AT^SNFM The power supply of the MICP2 pin (2nd analog audio interface) is now programmable. This gives you greater flexibility in connecting audio accessories or using MICP2 for a variety of functions other than audio.

For this purpose, the command AT^SNFM has been extended to include the additional parameter < MicVccCtl>.

AT^SNFM=,0 Switches off power supply at MICP2.

AT^SNFM=,1 Activates permanent power supply mode.




AT^SNFM=,2 Selects automatic power supply mode. In this mode, voltage is applied only during an active call. Power supply is controlled by the module.

5.3 Improved Command Features

Item / Category Problem / Workaround

ATS0 The ATS0 command is now PIN1 protected. This is necessary because each time you set ATS0=<n> with n>0, Migration from MC35 to TC45 will automatically perform a GPRS attach, unless it is already attached. This attach will not be performed when recalling a stored user profile with ATZ or on power-up, if the setting n>0 was stored in the user profile with AT&W.

AT+CFUN If a CSD call is received while Migration from MC35 to TC45 is operated in CYCLIC SLEEP mode AT+CFUN=7 or 8, Migration from MC35 to TC45 will properly resume power saving after the last character was transmitted over the AT interface.

AT+CPBR and AT^SPBR The responses returned when reading phone books with AT+CPBR or AT^SPBR have been improved:

If <index2> exceeds the maximum number of locations offered by the active phonebook, the command now properly returns the list of phone book records, followed by +CME ERROR 21.

Using ATD during an active call

If ATD is used while there is already an active call the response OK is issued immediately after dialing has completed, without relation to a successful call setup. This behavior is similar to the mode set with AT^SM20=0, but occurs also if AT^SM20=1. If the second call fails, the ME generates additional Result Codes, such as BUSY, NO CARRIER, NO DIALTONE. This behavior has been changed over the preceding release 01.00. The example below shows the call setup procedure when a call is already active and a second call attempt fails because the line of the called party is busy:

atd0301234567; Dialing out first partys number. OK The first call is established. atd0302222222; The number of the second party is dialed. OK The response OK is issued immediately,

though no call is established. BUSY Call state indication follows after OK, as with

mode AT^SM20=0.

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