Specifications

WM_PRJ_Q2501_PTS_002 - 001
March 2004
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3.3.8 Digital Power Supply for External Devices (VCC)
This output can be used to power some external functions. VCC has to be used
as a 2.8 V digital power supply. This power supply is available when the
module is on.
Pin description
Signal Pin # I/O I/O type Description
VCC 60 O Supply 2.8 V Power supply for external
digital devices
VCC digital power supply is mainly used to:
 pull-up signals such as I/O,
 supply the digital transistors driving LEDs,
 supply the SIM_PRES signal,
 act as a voltage reference for ADC interface (AUXADC),
 etc.
The maximal current being able to be provided by VCC output is 10 mA.
3.3.9 GSM transmission activity status
WISMO Quik Q2501 provides a status indication about the GSM RF
transmission activity (GSM_PAC_EN).
This output can be used for example as a power supply synchronization in
order to guarantee a correct current supply during transmission bursts.
Pin description
Signal Pin # I/O I/O type Description
GSM_PAC_EN 20 O Digital GSM transmission activity status
This signal indicates the following status:
 GSM_PAC_EN=0: no operation,
 GSM_PAC_EN=1: indicates increased power consumption during
transmission.