Download - I2C to PC - I2C Chip I2C & SMBUS, Slave IC's, Host ... · I2C to PC USB & RS232 TO I2C/SPI ADAPTOR & CONTROLLER ... •Easy ASCII commands ... Made up cable assemblies are available

I2C to PCUSB & RS232 TO I2C/SPI ADAPTOR & CONTROLLER

© 2002 Broadcast Equipment Ltd PRELIMINARY I2C2PC.doc r27 page 1 of 15ph +64 21 623-402 www.i2cchip.com [email protected]

Features•Uses BL233 I2C-Serial IC•Both RS232 & USB interfaces•Three separate I2C busses•2x SPI bus•2x Dallas type 1-Wire bus•Easy ASCII commands•High-Speed•On-board power supply•Galvanic Isolation•82B715 High current Bus buffer•Power-On, Watchdog and other

autonomous actions withoutworking PC

•Auto-switching USB/RS232•Cross-Platform: Linux, Windows,

PDA's etc•USB Bus Powered•45x80mm

Applications•Evaluation Boards for I2C & SPI

chips•Rapid Prototyping & PnP design•PC based instrumentation and control•ATE for I2C/SPI based equipment•Reader for 1Wire serial numbers•Isolated I/O

•Cheap and Easy Data logging•PC and Network Watchdogs•PDA/Calculator Analog/Digital I/O•Galvanically Isolated PC interface•Education•RS232 parrallel I/O•Evaluation of I2C and SPI chips

ProgrammableEEProm stores commands and settings•Power On Reset actions•Interrupt actions•Watchdog timeout actions•Macro's •Autonomous actions

DescriptionWith both USB and DB9 serialinterfaces this is a truly universal I2Cinterface, that opens your product up tothe widest possible range of computinghardware, with the simplest and mostportable software format.Building an I2C based instrumentneeds nothing more than your I2Cchip, everything else is included. Thereis an internal 5V power supply to runthe interface and your target hardware.Simple systems will run from the USB

USB

RS232

FibreOpticRS422

OptoBL232

5V PSU

82B715

I2C

TTL SerialPort

I2C

I2C

I2C

10x Buffer

4 I2C Ports

Gal

vani

c Is

olat

ionDual Interface I2C Adaptor


© 2002 Broadcast Equipment Ltd PRELIMINARY I2C2PC.doc r27 page 2 of 15ph +64 21 623-402 www.i2cchip.com [email protected]

bus power.

Unlike some competing products, itcan sustain high baud rates, and hasmultiple I2C BussesCompared to cruder solutions, itdoesn't rely on bit-bashing PCsoftware, ill defined I/O characterisics,or processor and OS dependent timing.

Power-On-Reset actions can be set inEEProm so that systems are properlyinitialised when the PC is not present.

Watchdog actions can be programmedto automatically respond to PC failure.

Galvanic isolation can be installedwhere the I2C busses need to beisolated from the computer.

An optional Fibre Optic interface isavailable where very high voltage ortotally secure isolation is required. An RS422 interface is available forlong distance or high noise immunity.Ferrite beads are fitted to all data linesfor EMC protection.

Table Of ContentsFEATURES.............................................................................................................................................1

APPLICATIONS....................................................................................................................................1

PROGRAMMABLE ..............................................................................................................................1

DESCRIPTION ......................................................................................................................................1

1 COMMANDS.......................................................................................................................................3

2 SOFTWARE INTERFACE................................................................................................................3

3 INSTALLING AND TESTING YOUR NEW ADAPTOR..............................................................4

4 RS232-USB SELECTION...................................................................................................................4

4.1 AUX INTERFACE .............................................................................................................................54.2 BLUETOOTH....................................................................................................................................5

5 I2C BUS CONNECTOR.....................................................................................................................5

6 CS AND INTERRUPT PINS..............................................................................................................6

7 BUS DRIVE .........................................................................................................................................7

8 POWER SUPPLY ...............................................................................................................................7

8.1 USB BUS POWERED .......................................................................................................................78.2 POWER TO I2C DEVICES.................................................................................................................78.3 LOCAL AND USB POWER .............................................................................................................7

9 OPTIONS.............................................................................................................................................8

9.1 GALVANIC ISOLATION....................................................................................................................8


© 2002-4 Broadcast Equipment Ltd I2C2PC.doc r27 page 3 of 15ph +64 21 623-402 www.i2cchip.com [email protected]

9.1.1 Power .....................................................................................................................................89.1.2 External 5V to PC Side ..........................................................................................................89.1.3 Fitting a DC-DC Convertor...................................................................................................89.1.4 Bypassing the isolation ..........................................................................................................89.1.5 Fitting Isolator Yourself.........................................................................................................99.1.6 USB Power only Cable ..........................................................................................................9

9.2 82B715 BUS EXTENDER.................................................................................................................99.3 USB LEDS AND POWER LED ..........................................................................................................99.4 USB EEPROM ................................................................................................................................9

10 EXAMPLE APPLICATIONS..........................................................................................................9

10.1 8 BIT I/O PORT.............................................................................................................................910.2 SIMPLE DATA LOGGER WITH NO PC SOFTWARE.........................................................................1010.3 SIMPLE RS232 I/O PORT............................................................................................................1010.4 RS232 TO LCD MODULE ADAPTOR ...........................................................................................1010.5 HUGE RS232 PARALLEL PORT ...................................................................................................1010.6 READING A DS2401 1 WIRE SERIAL NUMBER ............................................................................11

11 USB ...................................................................................................................................................11

12 FAQ ..................................................................................................................................................11

13 FACTORY TEST PROCEDURE..................................................................................................13

13.1 VISUAL INSPECTION ...................................................................................................................1313.2 DC SUPPLY CURRENT AND POWER SUPPLY ................................................................................1313.3 RS232 ........................................................................................................................................1313.4 USB ...........................................................................................................................................1313.5 I2C BUS 1...................................................................................................................................1313.6 I2C BUS 2...................................................................................................................................1413.7 INT PIN......................................................................................................................................14

14 SCHEMATICS AND DRAWINGS ...............................................................................................15

14.1 PCB OVERLAY...........................................................................................................................1514.2 SCHEMATICS...............................................................................................................................15

15 ORDERING INFORMATION ......................................................................................................14

16 OEM VERSIONS ............................................................................................................................14

16.1 RS232/USB TO TTL INTERFACE ...............................................................................................14

17 CO-OPERATION............................................................................................................................14

1 Command sRead the BL233 PDF Datasheet for a full description of commands and operation.

2 Software InterfaceThe I2C-2-PC appears as a serial port device when either the USB or RS232 are used.(Linux and Windows).


© 2002 Broadcast Equipment Ltd PRELIMINARY I2C2PC.doc r27 page 4 of 15

ph +64 21 623-402 www.i2cchip.com [email protected]

No special API's or DLL's are required to access it. Almost any programminglanguage can be used including Labview. Our customers are using it with• VB• C, C++• Labview• Matlab• Delphi• Java• Python• Perl• PDA's • Batch files

3 Installing and Testing Your New AdaptorThe I2C2PC is normally shipped set to 57,600 bd N81, RTS/CTS handshake. If you have Galvanic Isolation fitted, read section 9.1

•Download, Install and Start Realterm (realterm.sourceforge.net)•Change port settings to hardware handshake RTS/CTS. Set to HALFDUPLEX so

you can see what you type. Alternatively you can make a shortcut with theseparameters e.g.“realterm.exe baud=57600 flow=2 half”

•Ensure the Port Select jumper is in AUTO position (ie not fitted). The port willdefault to RS232 when the USB is not connected.

•Connect a DB9 serial extender (m-f) cable (not a cross over cable) to the RS232.•Apply 9V Centre positive 2.1mm power supply.•When you apply power you should see a default startup message like “HI I2C v103”.

Note you probably won't see this when using USB power, as the message isnormally sent before the bus has enumerated.

•Type “?”. The I2C2PC should reply with 2 hex bytes of the status byte eg “18”•Install the Port Select Jumper in the AUTO position (towards the USB connector).

Repeat the tests above (with RS232)•If you are going to use the USB, install the FTDI driver software for Windows.

http://www.ftdichip.com/FTWinDriver.htm

4 RS232-US B SelectionSelector 1at edge of board under USB/DB9 connectors: 1 Boards before May 2003 are:Jumper toward DB9: Always USB

http://realterm.sourceforge.net/

http://www.ftdichip.com/FTWinDriver.htm




•Jumper toward DB9: Always RS232•Jumper toward USB connector: Always USB •No Jumper: Autoselect USB when bus enumerates, RS232 otherwise.

Duplicate jumper holes are in the board above the 4052(J2), and can be fitted whenyou don't want to use the ones at the edge.

4.1 Aux InterfaceYou can add a 3rd interface, eg Fibre or RS422. This plugs into CN9, and is selectedby fitting J1, and the "USB Always" jumper.

4.2 BluetoothA Bluetooth serial module could be connected to the Aux interface. This would beideal for interfaceing with PDA's.

5 I2C Bus C onnectorThe I2C Bus connector used is a MICRO-MATCH by AMP. Either 4 or 6 way can beused. Connectors are available from Farnell.# 4 Way 6 Way1 SDA SDA2 VDD VDD3 VSS VSS4 SCL SCL5 INT / CS Interrupt input (active low) or

Chip select for SPI (jumper select)6 VAUX Aux supply. Not connected

The reason for the power lines being between the I2C wires is to stop the edges ofSDA and SCL coupling together. This follows the Philips pattern set out in section17.3 of The I2C Bus Specification.

If the length of the bus lines exceeds 10 cmThis arrangement will have similar capactive loading on SDA and SCL. Where youdon't use pins 5 & 6, it can be better to just use 4 wires.

Jumper toward USB connector: Autoselect USB when enumerated, RS232 otherwise.No Jumper: Always RS232



ph +64 21 623-402 www.i2cchip.com

AMPwww.amp.com

Farnell

www.farnell.com

RS

6 way male-on-wire

7-215083-6 149-068

6 pin female-onboard

7-215079-6 148-519

4 pin male-on-wire

7-215083-4 149-032

4 pin female-on-board

7-215079-4 148-507

Made up cable assemblies are available from Farnell.

Figure 1

6 CS and In terrupt PinsJumpers are provided to select the function of pin 5IRQ (input), and CS/1Wire (i/o). This is for BUS#connected to IRQ.

Bus #2

Bus #3

Bus #1

9V DC

5 [email protected]

of the I2C connector between 2, 3 only. Bus#1 is always

CS IRQ




7 Bus DriveThe bus is fitted with 1k5 pullup resistors in SIL resistor packs. The BL233 can drivemuch higher currents if required, 15-20mA @5V VCC. There is a 47 ohm protectionresistor in series with the outputs that will need to be reduced of course. You will need a buffer at the other end of the bus. If you want to reduce the current, replace the resistor pack. We recommend cutting itout with fine side cutters, removing the individual pins through the top of the board,and desoldering the holes.

8 Power Su pplyExternal power is 9-12V DC, (2.1mm centre positive). An on board power supplyregulator is fitted using a 7805.

•USB Bus Powered USB Data: ~50mA for I2C devices•USB Bus Powered RS232 Data: ~50mA for I2C devices•External Power, RS232•External Power USB

8.1 USB Bus PoweredThe USB bus can deliver up to 500mA. Devices that draw > 100mA from the busshould have switched load.

8.2 Power to I2C DevicesThe I2C Bus VDD is connected to the interfaces VDD (5V). To isolate an I2C Bus VDD from the I2C Adaptor's VDD, remove the associated0603 ferrite bead by the connector. (FB9-12)

8.3 Local AND USB PowerBoards manufactured after April 2003 should work happily with both external andUSB power.If you do not want the USB bus to try and power your equipment, remove D5 (byUSB connector). Normally you would do this when building the I2C-2-PC into astandalone equipment that has its own 5V supply.

With boards manufactured before May 2003:There are some traps to watch when using a local power source, and the USB adaptor.The USB chip will not see a power on reset when the USB Bus is connected, andlocal power is already applied, and may not enumerate correctly. See FTDIdocumentation for more reset details.




9 OptionsThese options are not fitted as standard, as few users require them.•IL716 Galvanic Isolation•82B715•USB Leds•Power LED•USB EEProm•3rd I2C bus connector•Aux serial interface connector and jumper

9.1 Galvanic IsolationThe NVE IL716-3 magnetic isolator is used for galvanic isolation. For moreinformation see the NVE datasheet.

9.1.1 PowerWhen isolation is fitted, you have to power the PC side separately from the I2C side.Normally USB power is used for the PC side, and an external 9V supply for the I2Cside. If you want to use the RS232 interface, you can still use the USB connector to providepower. Just fit the "RS232" jumper to force the interface to use RS232. (with nojumper the interface autoselects USB when the USB is connected to a computer, butnot when a USB power-only cable is used)

9.1.2 External 5V to PC SideIf you are not using USB power, fit 2 pin connector CN4 and protection zener D1(BZX85C5V6 or BZX85C6V2).The PC side requires 5V, 30mA.

9.1.3 Fitting a DC-DC ConvertorIf you want to power one side of the isolation barrier from the other, you can fit a 5V-5V DC-DC convertor module. The easiest point to access VCC and GND is pins 1and 6 of CN2 and CN9. You can power either side from from the other. Suitable convertors are available fromFarnell, RS, Digikey etc.

9.1.4 Bypassing t he isolationIf you don't need the isolation you can simply join VCC and GND ie CN2-1 to CN9-1and CN2-6 to CN9-6.Beware of forgetting that the isolation is gone!

http://www.nve.com/




9.1.5 Fitting Isolator YourselfIf you need isolation, either mill, or chisel the bridging tracks from the IL716footprint and fit the IC.If you use RS232, and an isolator you will need to power the RS232 section. Fit CN4,and protection diode D1 (BZX85C5V6 or C6V2)

9.1.6 USB Power only CableYou can use a USB Power-only cable to power the PC side, when using RS232. Thisis just a USB cable with only the 2 power wires fitted.

9.2 82B715 Bus Extender(See Bus Drive above. If you only need more current, you probably don't need the82715 at the I2C-2-PC end)The Philips 82B715 increases the drive of Bus 1 by 10x where long bus lengths mustbe driven. At the other end of the extended bus you have another 82B715 on a BusExtender Board

9.3 USB Leds and Power LedUSB-RX (led1) and USB-TX (led2) leds can be fitted if you want. Use 5V built-inresistor type leds (or use 3mm leds + 330 ohm resistors). These LEDs flash brieflywhen data is sent or received through the USB bus. They are useful for debuggingpurposes. Led3 is a power LED.

9.4 USB EEPro mUSB info can be set in the 93C46B EEProm. FTDI utilities allow you to set this. Thiswill let you enumerate the device as something other than a generic usb/serial adaptor,as well as setting special information such as current concumption.

10 Example ApplicationsSee the http://www.i2cchip.com for more examples.

10.1 8 Bit I/O Po rtUse a Philips PCF8574 or Onsemi JLC1562. Seehttp://www.i2cchip.com/pcf8574.html for i/o boards and keyboards. You can drivesmall relays like NAIS TQ-2 directly.

http://www.philipsic.com/

http://www.i2cchip.com/

http://www.i2cchip.com/pcf8574.html




Figure 2

10.2 Simple Dat a logger with no PC SoftwareUse a Philips PCF8591 4 channel 8 bit A-D chip. Store this macro in the EEProm at location 0. It will run automatically at power on,sending 4 channels of A-D data in hex, followed by LFS90 04 R04 T0A L0200 >00[Start][address 0x90 (8591)][Control register=0x04][Read 4 channels of A-D] [TypeLF (linefeed)][delay 512 ms][goto start]Capture the data to file with Realterm.Plot it with Excel, Matlab etc.

10.3 Simple RS232 I/O PortThe I2C-2-PC can be used directly as an 8 bit I/O port with a 1 bit IRQ input. No I2Cor SPI chips are needed at all. This is ideal for connecting relays, lights and switchesto a PC.O OF[write 0x0F direct to pins]Q[read pins]?[read IRQ input]

10.4 RS232 to L CD Module adaptorA single PCF8574 can drive a standard LCD module. This circuit is available builtup.

10.5 Huge RS232 Parallel PortTo get are large number of cheap and easy output pins with good drive capability, usethe SPI output, and 74HC4094 shift registers. Eg a 32 bit output with 4x 4094's.SDA4 is used as STB for the 4094'sG3 Y01020408 OFFFD OFFFC

[select bus3][send 4 bytes to 4094's][pulse STB pin to latch data] nb O not zero




10.6 Reading a DS2401 1 Wire serial numberTo read a DS2401 serial numberGC S ? W33 R04[Select 1 wire bus#1 (bus #C)][Start(reset)][Get status to check presence][ReadRomCommand][Read 4 bytes of rom data]Since Start can be followed immediately by write data, a shorter version is:GC S 33 R04[Select 1 wire bus#1 ][Start][ReadRom command][read 4 bytes]

11 USBUSB requires the Virtual Comport drivers for Windows. For other operating systemssee http://www.ftdichip.com/FTDriver.htm

USB introduces latency that may affect your software design. Seehttp://www.ftdichip.com/knowledgebase/AppNotes/005/knowledgebase.htm

This latency affects all USB devices. To avoid it you should structure your softwareto decouple the commands you send from the data coming back. ie you send as manycommands as possible to the BL233, then you process the data as it returns. If yousend a command, then wait for each response, performance can be very poor.

Just because USB runs at 12Mbps does not mean it really works fast. RS232 mayperform better in practice. This is why we provide both interfaces.

The USB configuration in EEProm can be changed so that it enumerates as a specialdevice rather than a virtual comm port. FTDI utilities can be provided to do thisFTDI provides D2XX DLL Drivers are to directly access the USB interface.http://www.ftdichip.com/FTD2XXDriver.htm We recommend using the Virtual Comm Port approach, as you retain the flexibility touse RS232 with no software changes.

12 FAQ

The BL233 datasheet is the place to find answers to your software questions!

Can I use 3V IC's?Yes. Bus# 3 has TTL Levels. Use 2 shottky diodes to clamp SDA &SCL to the 3VVCC.An alternative is a level shifter. Contact [email protected] for availability.

http://www.ftdichip.com/FTDriver.htm

http://www.ftdichip.com/knowledgebase/AppNotes/005/knowledgebase.htm

http://www.ftdichip.com/FTD2XXDriver.htm

mailto:[email protected]




Can you supply a 3V version?Yes we can for OEM orders.

My adaptor doesn't work. I have Galvanic Isolation. You have to power the PC side and the I2C side separately. See 9.1.1

USB is really slow?Latency is an issue. See USB section 11

The data is gobbledygook.First use Realterm to test the adaptor. Make sure the baud rate is correct (57600 isdefault) and that you are using RTS/CTS handshaking.

Realterm doesn't do XXXXYou can try the latest development version of Realterm athttp://www.i2cchip.com/realterm

Does it work with Labview?Yes. Labview has good serial support

How do I interface to a PDA?• Most PDA's have TTL level serial connections available. The BL233 will directly

interface to this through the AUX header on the pcb.• RS232 adaptor cables are available for some PDA's. You will probably need a

null modem plug/cable to connect them together• You can use an IRDA receiver connected to the AUX header. The IR port is a

comm port to the PDA software• Use a bluetooth module connected to the AUX header. These give up to 100m

range.• RS232 Compact Flash card. If your PDA has a CF slot you can get an RS232 card

for it.

My PDA has a USB cable. How do I use it?Except for the latest devices, most PDA's are a USB slaves, and cannot control otherUSB slaves. (ie you can't) If your PDA can plug direct into a USB printer then it might be possible.

http://www.i2cchip.com/realterm




13 Factory Test ProcedureThis is the factory test procedure:

13.1 Visual Insp ection

13.2 DC Supply current and Power supplySet PSU to 0V.Connect to DC socket.Increase supply voltage slowly to 8V, whilst measuring the 5V line across D2, andwatching for excessive current (>50mA)Check supply voltage on CD4052 is between 4.75 and 5.25V

13.3 RS232Install RS232 jumperConnect RS232 cable and set terminal program to nominal baud rate (normally57600)Connect power to adaptorTerminal should display "HI I2CAD V1.04" or similar. Note that once the EEPromhas been changed this may no longer be true.Type "?". Board will reply with 2 chars eg 18

Remove jumper (auto-select).Type "?" again and check still works

13.4 USB(Note that FTDI USB/serial adaptor drivers may need to be installed first time)Remove RS232. Plug in USB.Type "?" and check response.In case of problems check the USB RX and USB TX LED positions with anoscilloscope. These pulse low when chars are received or sent. Note that you won'tsee the "HI I2CAD V1.04" power on message through the USB port as the USBconnection is not enumerated yet, when the BL232 starts.

13.5 I2C Bus 1Connect the test PCF8574 board to I2C Bus1.Type "S42F0P"Half the leds will come on




13.6 I2C Bus 2Connect the test PCF8574 board to I2C Bus1.Type "G2" to change to I2C Bus 2Type "S42F0P"Half the leds will come on

13.7 INT PinPut jumpers J4,5 in INT positionSend ?. Reply is "18"Hold down a button on 8574 board.Send ?. Reply is "08"Check for 3 busses

14 Ordering Information

14.1 OEM Versio nsIt is available as a bare board in OEM packs. Bare boards can be supplied with aslightly different DB-9 if required for mounting the board on stand-offs.Special builds are also available for volume orders.• RS232 only• USB only• Bluetooth

14.2 RS232/USB to TTL InterfaceWe supply this board for use as a built up serial interface to customers TTL leveldevices. Contact us for pricing.CN2 connects to your device and can power it.Pin# Direction Function1 V+2 From PC TTL RTS3 From PC TTL TXD4 To PC TTL RXD5 To PC TTL CTS6 0V

15 Co-opera tionWe offer all customers a link page on our web site, where others can find out aboutyour products. We encourage you to use this.

1 2 3 4

A

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A Title

Number RevisionSize

A4

Date: 5-Jun-2003 Sheet of File: C:\cad\a\I2CAd\I2CAd.ddb Drawn By:

TTL_RTS

TTL_CTSTTL_RXD

TTL_TXD

VCC

GND

I2CSerialAdI2CSerialAd.Sch

123

CN5

Socket2.1mm

C17

47uF 10V

12

CN4

D2

C6V8

Power or VCC 5V Led Vin 1

GN

D2

Vout3

U87805 C18

47uF 16V

D3

1N4001

C19100n

led3

5Vorg3mm

D4

1N4001

USB_TXD

USB_RXDUSB_CTS

USB_RTS

GND

_PWREN

VCC

FT8U232BFT8U232B.Sch

TTL_RTSTTL_TXD

TTL_RXDTTL_CTS

GND2

VCC2

USB_TXDUSB_RTS

ALL_RXDALL_CTS

OPTO_RTSOPTO_TXD

VCC1

GND1

_USBEN

RS232Ad_BRS232Ad_B.sch

FID?

FIDUCIAL

FID?

FIDUCIAL

MP?

OTHER BARE BOARD

1 2 3 4

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Date: 29-May-2004 Sheet of File: C:\cad\a\I2CAd\I2CAd.ddb Drawn By:

GND1

23456789

R31k5

C8100nF

C10 15pF

C915pF

X114.7456

VDD 14

OSCIN 16

OSCOUT 15RST4

SCL4/CS23

VSS5

SDA22

SCL21 SDA1 18

SCL1 17

SDA3 13

SCL3 12

SDA4/CS3 11

RTS 10CTS9

TXD8

RXD7

INT6

U4BL233-DIP

VCC

GND

TTL_RTS

TTL_TXD

TTL_RXD

TTL_CTS

VCC

GND

VCC

VCC

GND

R17 47

R18

47

R19 47

R20 47

R16 47

R15 47

SDA1

VDD2

VSS3

SCL4

INT5

VAUX6

CN8I2C6PIN

SDA1

VDD2

VSS3

SCL4

INT5

VAUX6

CN7I2C6PIN

SDA1

VDD2

VSS3

SCL4

INT5

VAUX6

CN6I2C6PIN

GND

C23

100n

C22

100n

C21

100n

FB11

FB10

FB9

GND

GND

R23

47

R24

47

R25

47

GND

GND

NC 1

LX 2

LY 3

GND 4NC5

SY6

SX7

VCC8U7

82B715

SDA1

VDD2

VSS3

SCL4

INT5

VAUX6

CN10I2C6PIN

VCC

VCC C24

100n

C20

100n FB12

GND

R26

47

GND

R28470

R27470

I2C Bus 1 Buffered

I2C Bus1

I2C Bus 2

I2C Bus 3

1 2 3

J5CON3

1 2 3

J4CON3

Q1B

DMMT3906W n/f

Q1A

DUAL-PNP

R71k5

GND

VCC

Q2B

DMMT3906W n/f

Q2A

DUAL-PNP

R81k5

GND

VCC

Q3B

DMMT3906W n/f

Q3A

DUAL-PNP

R291k5

GND

VCC

Q4B

DMMT3906W n/f

Q4A

DUAL-PNP

R301k5

GND

VCC

R31

1k5

VCC

Bus 1&2 can have either Constant-Current or Resistive pullups. From the factory, resistive pullups are standard.

EITHER:Use 9 pin R5 resistive pull-ups (default)ORFit constant current generators (Q1-4+resistors) and 5 pin R3. 5 pin SIL is fitted with pin 1 in the pin 1 position

R32

1k5VCC

1 2 3 4

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GND1

C5100nF

GND1

GND1

GND1

GND1

C3100nF

C1 100nF

C2 100nF

C4 100nF

DCD 1

DSR 6

RXD 2

RTS 7

TXD 3

CTS 8

DTR 4

RI 9

GND 5

CN1DB9F

C1+1

V+2

C1-3

C2+4

C2-5

V-6

T2OUT7

R2IN8 R2OUT 9

T2IN 10

T1IN 11

R1OUT 12

R1IN 13

T1OUT 14

GND 15

VCC 16

U1ST202ECD

VDD11

GND12

IN13

IN24

OUT35

OUT46

GND18

VDD2 16

GND2 15

OUT1 14

OUT2 13

IN3 12

IN4 11

GND2 9

U3IL716

X0 12

X1 14

X2 15

X3 11

Y01

Y15

Y22

Y34

INH6

A 10

B 9VEE7

X 13

Y3

VCC 16

GND8

U274hc4052

GND1

C6

100nFGND1

C7100nF

R1

10kR2

10k

12

J1

VCC1

GND1

FB1FB2

FB3

VCC2VCC1

Refers to PC labels

123456

CN2

MM6F

GND2

VCC2

4052 Mux Posn's0: Opto1: Invalid (not used)2 :USB3: RS232

TTL_RTSTTL_TXDTTL_RXDTTL_CTS

GND2

VCC2

USB_TXDUSB_RTS

ALL_RXDALL_CTS

OPTO_RTS

OPTO_TXD

RS232

VCC1

GND1

C1647uF

VCC1

VCC1

FB4

IL716 normally NOT FITTEDand tracks bridge packageCut tacks and fit to isolate

GND1

123

J2

_USBEN

VCC1

USB

n/f: Auto

D1C6V8

123456

CN9

MM6FGND1

VCC1

Opto Select

GND2

External Fibre /RS422 Adaptor

External TTL Serial Device

123

J3

GND1

R5

10k

1 2 3 4

A

B

C

D

4321

D

C

B

A Title

Number RevisionSize

A4


GND1

GND1

GND1

R10 27

R9 27

R111k5

FB8

GND1

C14

100n

C1533nF

GND1

GND1

GND1GND1

C11

100n

Vbus 1

D- 2

D+ 3

GND 4

Chasi 5

CN3

USB CONECTOR

EESK1

EEDATA2

VCC3

RST4

RSTOUT5

3v3OUT6

USBDP7

USBDM8

GN

D9

SLEE

P10

RXLE

D11

TXLE

D12

VCC

IO13

PWRC

TL14

PWRE

N15

TXD

EN16

GND 17RI 18DCD 19DSR 20DTR 21CTS 22RTS 23RXD 24TXD

25V

CC26

XTI

N27

XTO

UT

28A

GN

D29

AV

CC30

TEST

31EE

CS32

U6

FT8U232B

CS 1CLK 2

D 3

Q4

GN

D5

ORG6

DNC7 VCC

8

U5M93C46BN1(8)

R1310k

R12

2k2

GND1

R6

100k

R4

10k

VCCUSB

GND1

X26MHz

USB_TXD

USB_RXD

USB_CTSUSB_RTS

GND

_PWREN

VCC

VCCUSB

R22 n/f

R21 10k

GND1

VCCUSB

PWRCTL tied low for Bus PoweredHi for self powered

led2

5Vorg3mmled1

5Vorg3mm

VCCUSB

C30 27pF C31 27pF

GND1 GND1

VBUS

PWREN is Active Low.Prevously USBEN was active hi,un FT8U232A

Q5BC847

D51N5711

R14470

C12

100n