Telit GE863-QUAD / GE863-PY
Hardware User guide
1vv0300715, Rev. ISSUE#0, - 21/02/06
Reproduction forbidden without Telit Communication written authorization – All Right reserved – Right of modification reserved
page 6 of 71
2 Hardware Commands
2.1 Turning ON the GE863-QUAD/PY
To turn on the GE863-QUAD/PY the pad ON# must be tied low for at least 1 second 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 GE863-QUAD/PY 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 "#" or with a bar over the name.
NOTE: The GE863-QUAD/PY turns fully on also by supplying power to the Charge pad (provided
there's a battery on the VBATT pads).
ON#
Power ON impulse
GND
R1
R2
Q1
