Tait TM8100 mobiles, Service Manual

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502 TMAA01-05 and TMAA01-07 Options Extender Boards TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
Table 19.4 External options connector (SK2) — pins and signals
Pin Signal Description
2 13V8_SW
1
13V8 supply
6 AUD_TAP_OUT
b
Programmable tap point out of the Rx or Tx audio
chain. DC-coupled
7 AGND
analogue ground
11 AUX_MIC_AUD
b
Auxiliary microphone input, with electret microphone
biasing provided.
Dynamic microphones are not supported.
1 AUD_TAP_IN
b
Programmable tap point into the Rx or Tx audio chain.
DC-coupled.
3 RSSI
2
analogue RSSI output
15 IOP_GPIO1
3
programmable function and direction
14 IOP_GPIO2
c
programmable function and direction
13 IOP_GPIO3
c
programmable function and direction
10 IOP_GPIO4
c
programmable function and direction
9 IOP_GPIO5
c
programmable function and direction
5 IOP_GPIO6
c
programmable function and direction
4 IOP_GPIO7
c
programmable function and direction
8 IOP_RXD
an RS-232 compliant asynchronous serial port -
receive data
12 IOP_TXD
an RS-232 compliant asynchronous serial port -
transmit data
1. This can be configured to be 5V. Refer to “Power Supply Line” on page 498 .
2. This can be re-configured to be RX_BEEP_IN. Refer to “RX_BEEP_IN Line” on page 498 .
3. 3V3 CMOS output via 1k
Ω
series resistance. 5V tolerant input.
front view