GE863-PRO3Hardware User Guide

1vv0300773a Rev. 0 - 24/01/08

TIP: For further documentation on ARM processor refer to ATMEL AT91SAM9260 datasheet

4 Hardware Commands

4.1 Turning ON the GE863-PRO3GSM/GPRS Engine

To turn on the GE863-PRO3GSM/GPRS engine the pad ON/OFF*-GSMmust be tied low for at least 1 second and then released.

The maximum current that can be drained from the ON/OFF*-GSMpad is 0,1 mA. A simple circuit to do it is:

ON#

R1

Q1

Power ON impulse

R2

GND

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-PRO3power 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-PRO3turns fully on also by supplying power to the Charge pad (Module provided with a battery on the VBATT pads).

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.

PWRMON line rises up also when supplying power to the Charge pad

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Telit Wireless Solutions 1vv0300773a manual Hardware Commands, Turning on the GE863-PRO3GSM/GPRS Engine

1vv0300773a specifications

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