Global Need of Standard I/O Global Need of Standard I/O Connection Interface Connection Interface

for Cellular Phonefor Cellular Phone

Presented to GSCOttawa, CanadaApril 29, 2003

Jindam MokTTA, Korea

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 1

SOURCE: TTA

TITLE: Global Need of Standard I/O Connection Interface for Cellular Phone

AGENDA ITEM: GSC, Item 1.3 – User Working Group

GSC-8 089

IntroductionIntroduction• 24 pin I/O interface unit is used for utilizing digital

cellular phone in Korea• Enhance the facilitation of recharging batteries and

connecting between digital cellular phone and other auxiliary equipments

• Recommend the specification on input/output connection interface of cellular phone

• Reduce the resource consumption and environmental pollution due to reusing the battery charger, hands-free and data communication equipments

• Applicable for any cellular phone, including IMT-2000, in the world

• Much benefit for cellular users, manufacturers, & common carriers

GSC-8, OTTAWA Slide 2April 28 ~May 1, 2003

Background of Standardization of Background of Standardization of I/O InterfaceI/O Interface for Cellular Phonefor Cellular Phone

• At first we tried to make a standard by DTH(Desk Top Holder) type

• But it was unfeasible to make a Practical Standard • Outer Shape of Cellular Phone Recharging Battery is

no longer the subject of standardization now• Insertion type Input/Output Connector is adopted as

the standard for Cellular Phone Battery Recharging• To maximize the convenience it has been considered

not only to recharge the batteries, but also to utilize the hands-free and data communication facilities

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 3

Standard on I/O Connection Standard on I/O Connection Interface of Digital Cellular PhoneInterface of Digital Cellular Phone

• 24 pin I/O interface unit is used for utilizing digital cellular phone

- 7 pins for battery charging

- 5 pins for hands-free

- 8 pins for data communication

- 4 pins for optional functions

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 4

Test Standards for CertificationTest Standards for Certification

• Test Standard on I/O Connector of Digital Cellular Phone : general performance, temperature stress, mechanical stress, chemical test, durability test, and abnormal test.

• Test Standard on Battery Charger of Digital Cellular Phone : basic functional test and the reliability test.

• TTA Certified Mark endowed through the test by these standards

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 5

User AspectUser Aspect • When batteries out, all users are suffering much

inconvenience and the sense of isolation from his family or intimate friends

• Sometimes it causes a heavy loss or a dangerous condition in an emergency

• If standard environments for battery recharging are established nearby, users’ portability and utilization of cellular phones will be highly enhanced

• Other convenience and benefit are also brought by additional functions, i.e. data communication and hands-free, with TTA standard interface connector

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 6

Industrial AspectIndustrial Aspect

• Due to the facilitation of cellular battery recharging by these standard environments, their mobile system throughput is highly enhanced, both mobile carrier and cellular manufacturer will have much benefit

• If the auxiliary equipments, i.e. data communication, hands-free, etc., have this standard interface, relevant manufacturers and IT & mobile companies will also be activated largely

• According to the operable time increase of cellular phones, distribution and circulation markets are also encouraged and activated

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 7

Public AspectPublic Aspect

• We used to discard old battery chargers whenever purchasing new cellular phones

• Now, auxiliary equipments including battery chargers with TTA standard interface can be reused

• It is expected to contribute to the expenditure reduction (over $300,000,000/year in Korea) and environmental conservation.

• Sooner or later, these standard will apply to the public facilities, i.e. waiting rooms of station, airport, etc

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 8

ConclusionConclusion • June, 2000, we had started to make standards• December, 2001, three relevant standards are fixed• 2002, most of all cellular phones that is sold in Korea

are adopting these TTA standards• Now, all battery chargers with standard interface

must be sold separately from main cellular phones• It helps us reduce quite a considerable resource

consumption, and prevent environmental pollution • We hope these standards also give much benefit for

worldwide users, manufacturers, mobile carriers, etc.April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 9

Standard on I/O Connection Interfaceof

Digital Cellular Phone in Korea

http://www.tta.or.kr/English/main/index.htm

ANNEXANNEX

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 10

Functions of Battery ChargingFunctions of Battery Charging

Pin No.

Signal Name

Description

1 BATTERY ID

* 27㏀:450mA, 4.7㏀:750mA(1.5㏀:900mA is optional) * Error rate of ID resister value : +,-10% * Charging Current Tolerance : +,-50mA * All of 3 battery ID resister value(27㏀, 4.7㏀, 1.5㏀)

should be detected. * If A battery charger has no 900mA output, the

charger should detect 1.5㏀ and have an 750mA output.

21, 22 POWER (+4.2V)

Input voltage for the cellular phone with external charging circuit

4,5 POWER (+5.0~5.5V)

Input voltage for the cellular phone with internal charging circuit

12, 19 POWER GROUND

Negative ground

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 11

Functions of Hands-FreeFunctions of Hands-FreePin No.

Signal Name Description

7 AUDIO IN Audio input of Analog hands-free system

11 AUDIO OUT Audio output of Analog hands-free system

7 PCM RX Audio input of Digital hands-free system

11 PCM TX Audio output of Digital hands-free system

8 PCM CLOCK PCM clock for Digital hands-free system

9 PCM SYNC PCM Synchronizing signal for Digital hands-free system

2 HANDS-FREE MODE

High level signal : Hands-free mode Low level signal : Phone mode

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 12

Functions of Data CommunicationFunctions of Data Communication

Pin No. Signal Name Description

3 DSR Data Set Ready

13 RXD Received Data

14 TXD Transmitted Data

18 RI Ring Indicator

17 DCD Data Carrier Detect

20 RFR : RTS Ready For Receiving : Request To Send

23 CTS Clear To Send

24 DTR Data Terminal Ready

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 13

Other FunctionsOther Functions

Pin No. Signal Name Description

6 ON SWITCH Limited for the test in manufacturing process

10 USB D- USB data signal

15 USB D+ USB data signal

16 USB POWER USB power input(Internal Transceiver : +5V)

21, 22 SWITCHED BATTERY(+)

Cellular phone battery provides power to auxiliary equipment

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 14

Functional Pin Allocation of Input Signal Functional Pin Allocation of Input Signal for Digital Cellular Phonefor Digital Cellular Phone

Pin No.

Signal Name I/O Note

1 BATTERY ID I For External Recharging Circuit 2 HANDS-FREE MODE I Below 3.3V 4 POWER (+5.0 ~ 5.5V) P For Internal Recharging Circuit 5 POWER (+5.0 ~ 5.5V) P For Internal Recharging Circuit 6 ON SWITCH I Limited for the Manufacturing Test 7 AUDIO IN / PCM RX I Average 100㎷/1kHz / PCM Receive

10 OPTION / USB D- I Optional / USB Data(-) 12 POWER GROUND P For Recharging 13 RXD I For Data Communication 16 USB Power (+5.0V) P USB Power Input(Internal Transceiver) 19 POWER GROUND P For Recharging 21 POWER (+4.2V) P For Recharging 22 POWER (+4.2V) P For Recharging 23 CTS I For Data Communication 24 DTR I For Data Communication

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 15

Functional Pin Allocation of Output Signal Functional Pin Allocation of Output Signal for Digital Cellular Phonefor Digital Cellular Phone

Pin No.

Signal Name I/O Note

3 DSR O For Data communication

8 OPTION / PCM CLOCK O Optional / Digital hands-free

9 OPTION / PCM SYNC O Optional / Digital hands-free

11 AUDIO OUT / PCM TX O Average 100㎷/1kHz / PCM transmit

14 TXD O For Data communication

15 OPTION / USB D+ O Optional / USB data

17 DCD O For Data communication

18 RI O For Data communication

20 RFR : RTS O For Data communication

21 SWTCHED BATTERY + (3.7V) P Power from phone

22 SWTCHED BATTERY + (3.7V) P Power from phone

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 16

Mechanical Specifications of I/O Connector Mechanical Specifications of I/O Connector for Digital Cellular Phonefor Digital Cellular Phone

• This connection plug has 3 concave keys to prevent standard I/O connector from being connected wrong.

• I/O interface of this standard is a 24 pin connector which is divided into two parts, i.e. a socket of digital cellular phone and a plug of charger cable.

• When the part of the I/O socket keys faces upper side and we look into the front side of the socket of digital cellular phone, 24 pin allocation is increasing in numerical order from left to right.

• This pin number is a reference of arranging each pin function.

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 17

Specifications ofSpecifications of Outer Part Outer Part for I/O Connection Socketfor I/O Connection Socket

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 18

SpecificationsSpecifications of Keys of Keys for I/O Connection Socketfor I/O Connection Socket

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 19

SpecificationsSpecifications of Locking Part for I/O of Locking Part for I/O Connection SocketConnection Socket

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 20

SpecificationsSpecifications of Pin Arranging Part of Pin Arranging Part for I/O Connection Socketfor I/O Connection Socket

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 21

SpecificationsSpecifications of Detail Part of Detail Part

for I/O Connection Plugfor I/O Connection Plug

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 22

Front side view of the I/O Front side view of the I/O connection socketconnection socket

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 23

Rear side view of the I/O Rear side view of the I/O connection socketconnection socket

April 28 ~May 1, 2003 GSC-8, OTTAWA Slide 24

Thank you!Thank you!