Specifications

Wireless CPU
®
Q24 Series
Interfaces
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This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.
WM_PRJ_Q24NG_PTS_001-004
January 16, 2007
3.19 VCC Output
This output may be used to power some external functions. This power supply is
available when the Wireless CPU
®
is ON.
Pin description
Signal Pin number I/O I/O type Description
VCC 40 O Supply Digital supply
Operating conditions
Parameter Condition Min Max Unit
I = 0 2.86 V Output voltage
I = 100 mA 2.74 V
Output Current 100 mA
3.20 Real Time Clock Supply (VCC_RTC)
The VCC_RTC input is used to provide a back-up power supply for the internal Real
Time Clock (RTC).
The RTC is supported by the Wireless CPU
®
when power-ON, but a back-up power
supply is necessary to save date and time information, when the Wireless CPU
®
is
switched off.
If the RTC is not used, this pin may be left open.
Equivalent circuit
If VDD<2.6V, the RTC regulator is disabled, a back-up battery is then necessary to
save date and time information.
Q24 Series
RTC
block
RTC regulator
BAT-RTC
VDD>2.6V