Accessory Interface; Overview - Siemens SXG 75 Service Repair Documentation

16 Accessory interface

16.1 Overview

A standard "Slim Lumberg" BenQ Mobile accessory connector allows approved devices to be
connected to the phone. These devices include battery chargers, data transfer cables (USB or
UART), camera flash and audio products (headset, car kit etc).
Signals at the accessory connector are listed below:
Pin Signal
1 POWER
2 GND
3 TX
4 RX
5 CTS
6 RTS
7 DCD
8 AUDIO_L
9 AUDIO_REF
10 AUDIO_R
11 EXT_MIC_GND
12 EXT_MIC
Accessory connector interfaces
Technical Documentation
TD_Repair_L3_SXG75_R1.0.pdf
Function
External charging input. Supply out
to accessories
Ground
RS232 data output.
D+ USB signal.
Accessory recognition.
RS232 data input.
D- USB signal.
Accessory recognition.
RS232 CTS output. DATA signal
input and output. Accessory
recognition.
RS232 RTS input. Accessory
recognition.
RS232 DCD output.
CLK signal output. Accessory
recognition.
Trigger for clip-on flash
Left audio channel output.
Ground reference for audio signals.
Right audio channel output.
Reference ground for microphone
signal.
Input for external microphone.
Company Confidential
2006©BenQ
Connection
Battery charger (V1100). Regulator for
supply output (N1100).
UART/USB multiplexer switch (Z1201).
Then to MSM6250 UART1,
or PM6650 USB driver.
UART/USB multiplexer switch (Z1201).
Then to MSM6250 UART1,
or PM6650 USB driver.
UART EMI filter (Z1200). Then to
MSM6250 UART1
UART EMI filter (Z1200). Then to
MSM6250 UART1
UART EMI filter (Z1200). Then to
MSM6250 UART1
Audio amplifier (N700).
Audio amplifier (N700).
Audio amplifier (N700).
MSM6250 MIC2N
MSM6250 MIC2P
Release 1.0
01/2006
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