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GE863-PRO
3
Hardware User Guide
1vv0300773a Rev. 0 - 24/01/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 21 of 64
NOTE: don't use any pull up resistor on the RESET*-GSM line nor any totem pole digital output. Using pull
up resistor may bring to latch up problems on the GE863-PRO
3
power regulator and improper functioning
of the module. The line RESET*-GSM must be connected only in open collector configuration.
TIP: The unconditional hardware reboot should be always implemented on the boards and software
should use it as an emergency exit procedure.
For example:
1- Let's assume you need to drive the RESET*-GSM ( RESET ) pad with a totem pole output of a
+1.8/5 V microcontroller (uP_OUT2):
4.4 Turning ON/OFF the GE863-PRO
3
ARM
To turn on the GE863-PRO
3
ARM the pad ON/OFF*-AP must be tied low and kept low, when pin is
raised ( released ) the ARM will shutdown.
The maximum current that can be drained from the
ON/OFF*-AP pad is 0,1 mA.
10k