User Guide

HE910 Hardware User Guide
1vv0300925 Rev.18 – 15-06-2012
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 33 of 91
A typical circuit is the following:
For example:
1- Let us assume you need to drive the RESET* pad with a totem pole output of a +3/5 V
microcontroller (uP_OUT2):
NOTE:
In order to avoid a back powering effect it is recommended to avoid having any HIGH logic
level signal applied to the digital pins of the HE910 when the module is powered off or during
an ON/OFF transition.