13. Buzzer driver
MC97F6108A User’s manual
136
13
Buzzer driver
A buzzer of MC97F6108A consists of 8-bit counter, a buzzer data register (BUZDR), and a buzzer
control register (BUZCR). It outputs square wave (0.122kHz to 62.5kHz @ 1MHz) through P30/BUZO
pin, and its buzzer data register (BUZDR) controls the buzzer frequency (refer to the following
expression). In a buzzer control register (BUZCR), BUCK[2:0] bits select a source clock divided by the
prescaler.
1)
(BUZDR
Ratio
Prescaler
2
Frequency
Oscillator
(Hz)
f
BUZ
+
=