Specifications

WM_PRJ_Q2501_PTS_001 – 003
March 2004
© 2003 All rights reserved
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Pin description
Signal Pin # I/O I/O type Description
VCC_RTC 76 I/O Supply RTC back-up power supply
2.5.2 Module activation
2.5.2.1 General description
This input is used to switch ON or OFF the WISMO Quik Q2501 module.
A high logic level has to be provided on the ON/~OFF pin to switch the module
on. This signal can be left at high level until switching the module off.
To be able to switch the module off, the ON/~OFF pin has to be released before
using AT+CPOF command through the firmware.
Pin description
Signal Pin # I/O I/O type Description
ON/~OFF 26 I Internal
100 kΩ pull
down
Module Activation
2.5.2.2 Operating sequences
2.5.2.2.1 Power ON
Once the module is supplied by the power source, the application must set the
ON/~OFF signal to high to start the module power ON sequence.
The ON/~OFF signal must be held for 1 s minimum. After this time, an internal
mechanism keeps it on hold.
During the power ON sequence, an internal reset is automatically performed by
the module for 240 ms (typical) 560 ms (max).
During this phase, any external reset should be avoided.(External Reset is an
emergency Reset).
Once the initialization is complete (timing is SIM and network dependent) the AT
interface answers « OK » to the application. For this, the application has to send
AT↵.
If the application manages hardware flow control, the AT command can be sent
during the initialization phase. Another solution is to use the AT+WIND
command to get an unsolicited status from the module.
For further details, please refer to the AT commands documentation (AT+WIND,
AT+WAIP).