38
TMAA01-02 RS-232 Board
TM8100/TM8200 Accessories Manual
© Tait Electronics Limited
August 2005
3.3
Interface Specification
The following tables summarize the signals used for the RS-232 board on the
internal options connector (SK1 on the RS-232 board) and the external
options connector (SK2 on the RS-232 board).
Note
The TM8000 3DK Hardware Developer’s Kit Application
Manual (product code MMAA30-01-00-807) contains a detailed
electrical specification for the signals available on the radio’s inter-
nal options connector. This manual is part of the 3DK Resource
CD, which can be purchased using product code TMAA30-01.
Table 3.2
Internal options connector—pins and signals
Pin
Connector
Signal
Description
1
13V8_SW
switched 13V8 supply from the radio
2
AUD_TAP_OUT
Programmable tap point out of the receive or transmit audio chain.
DC-coupled
3
AGND
analogue ground
4
AUX_MIC_AUD Auxiliary microphone input, with electret microphone biasing
provided.
Dynamic microphones are not supported.
5
RX_BEEP_IN
receive sidetone input, AC-coupled
6
AUD_TAP_IN
Programmable tap point into the receive or transmit audio chain.
DC-coupled
7
RX_AUD
not connected
8
RSSI
analogue RSSI output
9-15 IOP_GPIO1 to
IOP_GPIO7
programmable function and direction
16
DGND
digital ground
17
IOP_RXD
an RS-232 compliant asynchronous serial port - receive data
18
IOP_TXD
an RS-232 compliant asynchronous serial port - transmit data
B
D
F
H
J
1!
1#
1%
1&
C
E
G
I
1)
1@
1$
1^
1*
top view
Table 3.3
External options connector—pins and signals
Pin
Signal
Direction
2
serial transmit data
output from the radio
3
serial receive data
input to the radio
5
data ground
—
7
RTS using IOP_GPIO3
input to the radio
8
CTS using IOP_GPIO1
output from the radio
front view
