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MM6854/64 Dual Band GSM Data Modem
Issue 1.0 ME 820047
03/00 Page 41
7.7 Connections
7.7.1 9 pin D-type (RS-232 Interface)
Pin Function
1 DCD
2TXD
3RXD
4DTR
5GND
6DSR
7RTS
8CTS
9RI
Table 7-1 - 9 pin D-type socket connections
7.7.2 25 pin D-type
Pin Function
1GND
2 Software update supply 5.2 to 7.2V
3 Software update programming voltage 0 – 5.2V
4 Software update serial data Rx 0 – 3 V
5 Software update serial data Tx 0 – 3 V
6 Reserved for future use
7 Reserved for future use
8 Reserved for future use
9 Reserved for future use
10 GND
11 Reserved for future use
12 Reserved for future use
13 GND
14 GND
15 Ignition (active low)
16 Power Supply (+9 to +28VDC)
17 Power Supply GND
18 Reserved for future use
19 Reserved for future use
20 Reserved for future use
21 Reserved for future use
22 Reserved for future use
23 Reserved for future use
24 Reserved for future use
25 Reserved for future use
Table 7-2 - 25 pin D-type plug connections
7.8 Summary
This section has briefly covered the installation of the MM-6854 data modem.