Telit GM862-QUAD/-QUAD-PY
Hardware User Guide
1vv0300692, Rev. ISSUE#0, - 04/10/2005
Reproduction forbidden without DAI Telecom written authorization – All Right reserved – Right of modification reserved
page 41 of 69
7.3 Using the Alarm Output GPIO6
The GPIO6 pin, when configured as Alarm Output, is controlled by the GM862-QUAD module and
will rise when the alarm starts and fall after the issue of a dedicated AT command.
This output can be used to power up the GM862-QUAD controlling microcontroller or application
at the alarm time, giving you the possibility to program a timely system wake-up to achieve some
periodic actions and completely turn off either the application and the GM862-QUAD during sleep
periods, drammatically reducing the sleep comsumption to few
μ
A.
In battery powered devices this feature will greatly improve the autonomy of the device.
7.4 Using the Buzzer Output GPIO7
The GPIO7 pin, when configured as Buzzer Output, is controlled by the GM862-QUAD module
and will drive with appropriate square waves a Buzzer driver.
This permits to your application to easily implement Buzzer feature with ringing tones or melody
played at the call incoming, tone playing on SMS incoming or simply playing a tone or melody
when needed by your application.
A sample interface scheme is included below to give you an idea of how to interface a Buzzer to the
GPIO7:
NOTE: To correctly drive a buzzer a driver must be provided, its characteristics depend on the Buzzer
and for them refer to your buzzer vendor.
