User's Manual

HC864-AUTO Hardware User Guide
1vv0300946 Rev.4 – 2012-12-27
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 55 of 77
11.4. Using the Alarm Output GPIO6
The GPIO6 pad, when configured as Alarm Output, is controlled by the HC864-AUTO
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 HC864-AUTO 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 or the HC864-
AUTO during sleep periods. This will dramatically reduce the sleep consumption to few A.
In battery-powered devices this feature will greatly improve the autonomy of the device.
NOTE:
During RESET the line is set to HIGH logic level.