Technical Site Documentation myC-4
Ref. SCT U38 SSC DTS 0023 – Index B - February 21, 2005
Page
2-6
2.3 DATA/AUDIO/CHARGE CONNECTOR
2.3.1 Connector description
This connector is located at the bottom of the transmission module and enable the connection to various
accessories. It comprises power supply pins and signals.
2.3.2 Signal description
SYMBOL
PIN No.
SIGNAL FUNCTION
BFTXP
1
Differential input from microphone
BFTXN
2
Differential input from microphone
BFRXP
3
Differential output to earphone
BFRXN
4
Differential output to earphone
VBAT
5
POWER SUPPLY IMAGE VOLTAGE, connect this signal
to «CHARGER» (pin n°1) to switch the module on.
DETECT
6
Accessories detection
CTS
7
Clear To Send
RTS
8
Request To Send
DSR
9
Data Send Ready
DTR
10
Data Terminal Ready
TXD1
11
UART transmit 1
TXD2
12
UART transmit 2
GND
13
ZERO VOLT
RXD1
14
UART receive 1
RI
15
Ring Indicator
DCD
16
Data Carrier Detect
RXD2
17
UART receive 2
CHARGER
18
Phone set power ON and power supply signal.
Connector
GSM
1
18