Specifications

WM_PRJ_Q2501_PTS_001 – 003
March 2004
© 2003 All rights reserved
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2.7.5 GPS antenna power supply
A voltage input is available on the System Connector in order to supply a GPS
active antenna connected to the WISMO Quik Q2501 module.
This power supply DOES NOT need to be protected, since the protection is
already embedded in the module.
Pin description
Signal Pin # I/O I/O type Description
GPS_VANT 18 I Supply GPS antenna external supply

If 5V Antennas are used, it is necessary to provide 5V on this pin.

If 3V antennas are used:
o
If the current sinked by the antenna does not exceed 10 mA, the
antenna can be powered by the internal 3 V Supply. Connect
GPS_VANT to VBATT.
o
if the current exceeds 10 mA, it is necessary to provide 3 V on this
pin

If Single Coax option is used, it is mandatory to provide a 5 V supply on
this pin.
2.8 Operating mode configuration
Operating
mode
ON/~OFF
(input signal)
GPS_EN
(input signal)
GSM_BBEN
(output signal)
Module OFF Low Low Low
GSM/GPRS only High Low High
GPS only High High High (see Note)
GSM/GPRS/GPS High High High
Note
: in GPS only mode, the GSM function of the WISMO module keeps on to
be supplied (GSM_BBEN=1) in order to control:

the GPS antenna supply,

the GPS reset,

etc.