Telit Wireless Solutions GE863-QUAD - Manual (Page 11)

GE863-QUAD
GE863-PY
1vv0300715 Rev. 1 - 19/09/06
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Right reserved page 11 of 79
3 Hardware Commands
3.1 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).
For example:
ON#
Power ON impulse
GND
R1
R2
Q1