Using GE864-GPS (GPS controlled by external host)

[AstridFraise]

Hi guys,
My problems is the lack of information in "GE864-GPS Hardware User Guide". In the section about GPS_WAKEUP and GPS_ON_OFF signals they say :

The GPS starts after asserting a rising edge pulse on GPS_ON_OFF input and when high
level persists for at least three cycles of RTC clock. Before asserting another pulse to
GPS_ON_OFF input, the host controller must put it at low state and hold it low for at least
three cycles of the RTC clock

The GE864-GPS has included the RTC, but I can not find it anywhere about the RTC clock. I know

I know the most RTC used a crystal of 32.768Khz and some product of Telit too. Of course I'm waiting the answer of my distribuitor but I dont lose anything asking here.

Does anyone know anything about this?

Regards