User's Manual
GE864
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-DUAL V2 Hardware User Guide
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DUAL V2 Hardware User Guide
1vv0300875 Rev.1 – 2010-03-29
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 53 of 73
Using the Alarm Output GPIO6
The GPIO6 pad, when configured as Alarm Output, is controlled by the 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 module controlling micro controller 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 module during sleep periods, dramatically reducing the sleep
consumption to few µA.
In battery-powered devices this feature will greatly improve the autonomy of the
device.
NOTE:
NOTE:NOTE:
NOTE:
During RESET the line is set to HIGH logic level.
11.6. Using the Buzzer Output GPIO7
As
Alternate Function
, the GPIO7 is controlled by the firmware that depends on the
function implemented internally.
This setup places always the GPIO7 pin in
OUTPUT
direction and the corresponding
function must be activated properly by AT#SRP
AT#SRPAT#SRP
AT#SRP command (refer to
AT commands
specification
).
Also in this case, the
dummy value
for the pin state can be both “
0
” or “
1
”.
• Send the command AT#GPIO=7, 1, 2<cr>:
• Wait for response OK
• Send the command AT#SRP=3
The GPIO7 pin will be set as
Alternate Function
pin with its
dummy
logic status set to
HIGH
value.
The “
Alternate Function
” permits your application to easily implement Buzzer
Buzzer Buzzer
Buzzer
feature
featurefeature
feature with some small hardware extension of your application as shown in the
sample figure below.