User Manual

GM862-QUAD / PY Hardware User Guide

1vv0300748 Rev. 5 - 20/09/07

5 Hardware Commands

5.1 Turning ON the GM862-QUAD / PY

To turn on the GM862-QUAD / PY the pin ON# must be tied low for at least 1 second and then

released.

The maximum current that can be drained from the ON# pin 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 GM862-QUAD / PY power regulator and improper power on/off of the module. The line ON#

must be connected only in open collector configuration.

NOTE: The GM862-QUAD/PY turns 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

ON#

Power ON impulse

GND