User's Manual

GE910 Hardware User Guide

GE910 Hardware User GuideGE910 Hardware User Guide

GE910 Hardware User Guide

1vv0300962 Rev.9-bis3 2013-05-20

Mod. 0805 2011-07 Rev.2

4. Hardware Commands

4.1. Turning ON the GE910

To turn on the GE910 the pad ON-OFF* must be tied low for at least 5 seconds and then

released.

The maximum current that can be drained from the ON-OFF* pad is 0.2mA.

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 GE910 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”*" or with a bar over the name.

TIP:

To check if the device has powered on, the hardware line PWRMON should be monitored. The

device is powered on when PWRMON goes high.

NOTE:

It is mandatory to avoid sending data to the serial ports during the first 200ms of the module

start-up.