User's Manual

GE865 Hardware User Guide

1vv0300799 Rev.6 - 04/06/09

4 Hardware Commands

4.1 Turning ON the GE865

To turn on the GE865 the pad ON# must be tied low for at least 1 seconds and then released.

The maximum current that can be drained from the ON# pad is 0,1 mA.

A simple circuit to do it is:

NOTE: don't use any pull up resistor on the ON# line, it is internally pulled up. Using pull up resistor may bring to

latch up problems on the GE865 power regulator and improper power on/off of the module. The line ON# must be

connected only in open collector configuration.

NOTE: In this document all the lines that are inverted, hence have active low signals are labeled with a name that

ends with”#" or with a bar over the name.

TIP: To check if the device has powered on, the hardware line PWRMON should be monitored. After 900ms the line

raised up the device could be considered powered on.

ON#

Power ON impulse

GND