Siemens TC35i User Manual download pdf (Page 17)

TC35i Terminal Hardware Interface Description

Confidential / Released

TC35i_T_HD_v01.05 Page 17/37 10.07.2003

3.5 Terminal circuit

ZIF connector (40 pole)

FFC

EMC

(RS-232)

RS-232 driver

D-Sub

9 pin

LED driver

GSM status

EMC

(Audio)

EMC

(Power)

Overvoltage

protection

Regulator

Power on/off

logic

IGT_IN

(Ignition)

/IGT (Ignition)

Power on/off

BATT+

(Main supply)

Fuse

SIM

card

interface

EP1

MIC1

SYNC

CCxxx

2V9

Power

Power supply

Western jack (6 pin)

Western jack

(4 pin)

FME

50 Ohm

2V9

BATT+

2V9

EMC (on(off)

RS-232

interface

/RXD0, /TXD0, /RTS0, /CTS0, /DTR0, /DSR0, /DCD0, /RING0

GSC (Antenna reference point)

PD_IN

(Power down)

/EMERGOFF

Microphone

supply

VPP

2V9

VDDLP

(Power down supply)

2V9

RF cable

GSM Engine TC35i

LED

SIM

RS-232 interface

Audio

ON/OFF logic

Power supply

Radio interface

Terminal circuit

Audio

GSM interface

RF interface

Voltage

limiter

DTR

2V9

Figure 3: TC35i Terminal circuit block diagram

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 36 37

Hardware 1
Interface 1
Description 1
Contents 3
Figures 4
0 Document history 5
1 Introduction 6
1.2 Standards 7
1.3 Safety precautions 8
1.4 Terms and abbreviations 10
Confidential / Released 11
3 Interface description 13
3.3 The TC35i GSM engine 15
3.4 Operating modes 16
3.5 Terminal circuit 17
3.5.2 RTC 20
3.6.1 RS-232 interface 20
3.6.2 Audio interface 22
GSC connector (from Murata) 25
TRX In / Output 25
L (27nH) 25
3.6.4 SIM interface 26
3.6.5 Status LED 26
4.1 Attaching the terminal 28
6 Full type approval 35
6.1 Restrictions 36
6.2 CE Conformity 36
6.3 EMC 36

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Siemens TC35i User Manual Page 17

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