CONNECTOR PIN FUNCTIONS A - 5
Enhanced Control Head - Pin Function
Figure A-4 View of the Enhanced Control Head with GCAI MMP Connector
33 RS232_DTR Data Terminal Ready
34 RS232_CTS Clear To Send
35 RS232_RX RX-Data
36 RS232_RI Ring Indicator
37 OPTION_DET Option Detect; for future applications
38 9V3 Regulated 9V3
39 NC Not Connected
40 HANDSET AUDIO Handset Audio to earpiece
GCAI Pin #
Default
Function
Alternative
Functions
Functions
when USB
Functions
when RS232
1 1-WIRE 1-WIRE 1-WIRE 1-WIRE 1-WIRE
2 GPIO_3 PTT GP Input or Output GP Input or Output RS-232-RTS *
3 SPEAKER SPEAKER SPEAKER SPEAKER SPEAKER
4 GPIO_2 GPIO_2 INPUT GP Input or Output DATA - RS-232-RXD *
5GND GND GND GND GND *
6 OPT 5V HIGH Impedance OPT 5V VBUS OPT 5V
7 MIC + MIC + MIC + MIC + MIC +
8 GPIO_1 GPIO_1 INPUT GP Input or Output DATA + RS-232-TXD *
9 GPIO_4 HOOK GP Input or Output GP Input or Output RS-232-CTS *
10 GPIO_0 GPIO_0 INPUT GP Input or Output,
PWR ON
GP Input or Output,
PWR ON
GP Input or Output,
PWR ON
Table A-4 Pin assignment GCAI - FRONT – Mobile Microphone Port (MMP) / *): Optional
Table A-3 Transceiver Pin Assignment of the Expansion Board Connector (40 pins)
*) For Expansion Head Connection only.
MMP top view
6866539D31.book Page 5 Tuesday, March 20, 2007 6:32 PM
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