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ZEUS Technical Manual Appendix F - ZEUS Modem details
© 2007 Eurotech Ltd Issue D 121
The following table shows the functions of control/status pins on the host interface:
EXP1_GPIO Signal name Dir Active Function
7 PTT Output High Push To Talk. See note 1
8 GSM_ON Input See note 2 Modem enable
9 GSM_STS Output High Modem ON/OFF status
10 GPS_ON Input High GPS module enable
11 GPS_PSUON Input High Not Used (PU keeps it at logic ‘1’)
12 GPS_BOOT Input NA Not Used (PU keeps it at logic ‘1’)
13 GPS_PPS Output NA GPS Pulse Per Second
Note 1: Only available with iDEN modules.
Note 2: Please see the datasheet of the particular module used.
GSM_ON is inverted when used with iDEN modules
(GSM_ON=’0’ – iDEN module is on).
J9 –iO270 audio/PTT connector
Connector: NELTRON 2417RJ-8-F4, 8-way 2mm header
Mating connector: JST PHR-8, 8-way 2mm housing, female
Mating crimps: JST SPH-002T-P0.5S
Pin Signal name
1 SPKR-
2 SPKR+
3 3V_OPT
4 VCC
5 GND
6 PTT
7 MIC-
8 MIC+
As viewed from the connector pins
1
8