ZEUS Technical Manual

Appendix F - ZEUS Modem details

 

 

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-

18

2 SPKR+

3 3V_OPT

4 VCC

As viewed from the connector pins

5GND

6PTT

7MIC-

8MIC+

© 2007 Eurotech Ltd Issue D

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