User's Manual

GE/GC864-QUAD V2 and GE864-GPS Hardware User Guide
1vv0300915 Rev.2 – 2011-06-15
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Reserved. Page 26 of 97
5. Hardware Commands
5.1. Turning ON the GE/GC864-QUAD V2 and GE864-
GPS
To turn ON the GE/GC864-QUAD V2 AND GE864-GPS the pad ON# must
be tied low for at least 1 second and then released. Pulse
duration less than 1000ms should also start the power on
procedure, but this is not guaranteed.
When the power supply voltage is lower than 3.4V the pad ON#
must be tied low for at least 4 seconds.
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 module, 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 a
"#".