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Powering off the Venus GPS.

Tips and questions relating to the GPS modules from SFE

Powering off the Venus GPS.

By stian
-  Mon Jun 13, 2011 6:44 am #128662
Hi.

I am using a Venus GPS Receiver - Venus634FLPx to get the position of my system. Now, i only need the position on a request form the microcontroller and would like to have the microcontroller power off the GPS module when it's not in use. It seems i can not set the module in "OFF" or "Stand by" by sending some binary message to it. Or am I wrong? If I am right, what is the usual way of powering off a module like this? Do i just cut the main voltage supply input (VCC) and keep VBAT powered?

-Thanks

Re: Powering off the Venus GPS.

By emf
-  Thu Jun 16, 2011 7:33 am #128856
Sounds about right. The datasheet says:
To put Venus634FLPx in power-down mode, an external 3V LDO regulator with enable control can be used to provide 3V to
pin-2 and pin-36. Disabling the regulator reduces the total current to < 10uA, consumed by the RTC circuitry and backup
SRAM through VBAT pin.
When using the described power-down mode, add a pull-up 10K resistor on pin-44, and add a series 10K resistor on pin-42.
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