User's Manual

CL865-DUAL Hardware User Guide
1vv0301104 Rev.1 – 2014-03-07
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Reserved. Page 22 of 70
Mod. 0805 2011-07 Rev.2
5.3. Hardware Unconditional Shutdown
The Unconditional shutdown of the module could be activated using the RESET* line (pad
47).
WARNING:
The hardware unconditional shutdown must NOT be used during normal operation of the
device since it does not detach the device from the network. It shall be used as an emergency
exit procedure.
To unconditionally shutdown the CL865, the pad RESET* must be tied low for at least 800
milliseconds and then released.
NOTE:
Do not use any pull up resistor on the RESET* line nor any totem pole digital output. It is
pulled up internally to VBATT with 57kΩ. Using an external pull up resistor may bring latch
up problems on the CL865 power regulator and improper functioning of the module.
The line RESET* must be connected only in open collector configuration.
The RESET* will generate an unconditional shutdown of the module without an automatic
restart.
The module will shutdown but will NOT perform the detach from the cellular network.
To proper power on again the module please refer to 5.1 Auto-Turning ON the CL865.
TIP:
The unconditional hardware shutdown must always be implemented on the boards and the
software must use it only as an emergency exit procedure.