User guide

UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
- 03/02/09
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 59 of 78
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 feature
with some small hardware extension of your application as shown in the next sample
figure.
NOTE:
To correctly drive a buzzer, a driver must be provided. its characteristics depend on
the buzzer. Refer to your buzzer vendor.