Specifications

Product Technical Specification & Customer Design Guidelines
Interfaces
3.12 PWM / Buzzer Output
This output is controlled by a PWM controller and provides a buzzer service.
3.12.1 Features
The BUZZER is an open drain one. A buzzer can be directly connected between this
output and VCC. The maximum current is 100 mA (PEAK).
Electrical characteristics
Parameter Condition Minimum Maximum Unit
V
OL
Iol = 100mA 0.4
V
I
PEAK
VCC = VCCmax 100
mA
Frequency 3 10000*
Hz
Duty cycle 0* 100*
%
*Notes
Mind the maximum frequency and the minimum/maximum duty cycle; they are
limited due to the RC configuration.
When the limits are approached, the amplitude modulation is less fine.
3.12.2 Pin Description
Signal Pin I/O I/O type Reset state Description
number
BUZZER 31 O Open
drain
Z Buzzer output
See chapter
3.4, “Electrical Information for Digital I/O” on page 30 for 2V8-1, 2V8-2, pull-up and open drain
voltage characteristics and for Reset state definition.
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WA_DEV_Q64_PTS_001-003 January 9, 2009