Abov MC96F6432S Series - Buzzer Driver; Overview; Block Diagram

168
MC96F6432S
ABOV Semiconductor Co., Ltd.
11.9 Buzzer Driver
11.9.1 Overview
The Buzzer consists of 8bit counter,buzzer data register (BUZDR), and buzzer control register (BUZCR). The Square
Wave (61.035Hz~125.0kHz @8MHz)is outputted through P13/SEG17/AN10/EC1/BUZO pin. The buzzer dataregister
(BUZDR) controls the buzzer frequency (lookat the following expression). In buzzer control register(BUZCR),
BUCK[1:0] selects source clock divided by prescaler.
BUZDR[7:0]
Buzzer Frequency (kHz)
BUZCR[2:1]=00
BUZCR[2:1]=01
BUZCR[2:1]=10
BUZCR[2:1]=11
0000_0000
125kHz
62.5kHz
31.25kHz
15.625kHz
0000_0001
62.5kHz
31.25kHz
15.625kHz
7.812kHz
…
…
…
…
…
1111_1101
492.126Hz
246.063Hz
123.031Hz
61.515Hz
1111_1110
490.196Hz
245.098Hz
122.549Hz
61.274Hz
1111_1111
488.281Hz
244.141Hz
122.07Hz
61.035Hz
Table 11.15 Buzzer Frequency at 8 MHz
11.9.2 Block Diagram
Pre
scaler
fx
MUX
Counter
fx/32
fx/64
fx/128
fx/256
2
BUCK[1:0]
8-bit Up-Counter
BUZDR
Comparator
F/F
Clear
BUZO
BUZEN
Figure 11.48 Buzzer Driver Block Diagram
1)(BUZDRRatioPrescaler 2
Frequency Oscillator
(Hz)f
BUZ

