User's Manual

GE866-DUAL Hardware User Guide
1VV0301051 Rev. 2 – 2014-04-07 7
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Reserved. Page 56 of 82
Mod. 0805 2011-07 Rev.2
The GPIO6 pad, when configured as Buzzer Output, is controlled
by the GE866-QUAD module and will drive a Buzzer driver with
appropriate square waves.
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.
A sample interface scheme is included below to give you an
idea of how to interface a Buzzer to the GPIO6:
TR1
BCR141W
TR2
SMBT2907A
R1
4,7K
R2
1K
D1
D1N4148
C1
33pF
+
-
+V buzzer
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