User's Manual

GE/GC864-QUAD V2 and GE864-GPS Hardware User Guide
1vv0300915 Rev.2 – 2011-06-15
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights
Reserved. Page 27 of 97
TIP:
To check if the device has powered on, the hardware line
PWRMON should be monitored. After 1000ms the line raised up
the device could be considered powered on.
NOTE:
When the power supply voltage is lower than 3.4V, to turn ON
the module, the pad ON# must be tied low for at least 3
seconds.
For example:
1- Let us assume you need to drive the ON# pad with a totem
pole output from +1.8V up to 5V microcontroller:
2- Let us assume you need to drive the ON# pad directly with an
ON/OFF button: