MC96F6432
June 22, 2018 Ver. 2.9
181
11.9 Buzzer Driver
11.9.1 Overview
The Buzzer consists of 8 bit counter, buzzer data register (BUZDR), and buzzer control register (BUZCR). The
Square Wave (61.035Hz~125.0 kHz @8MHz)
is outputted through P13/SEG17/AN10/EC1/BUZO pin. The
buzzer data register (BUZDR) controls the buzzer frequency (look at the following expression). In buzzer control
register (BUZCR), BUCK[1:0] selects source clock divided by prescaler.
Table 11-15 Buzzer Frequency at 8 MHz
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
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)
(BUZDR
Ratio
Prescaler
2
Frequency
Oscillator
(Hz)
f
BUZ
Summary of Contents for MC96F6432 Series
Page 24: ...MC96F6432 24 June 22 2018 Ver 2 9 4 Package Diagram Figure 4 1 48 Pin LQFP 0707 Package...
Page 25: ...MC96F6432 June 22 2018 Ver 2 9 25 Figure 4 2 44 Pin MQFP Package...
Page 26: ...MC96F6432 26 June 22 2018 Ver 2 9 Figure 4 3 32 Pin LQFP Package...
Page 27: ...MC96F6432 June 22 2018 Ver 2 9 27 Figure 4 4 32 Pin SOP Package...
Page 28: ...MC96F6432 28 June 22 2018 Ver 2 9 Figure 4 5 28 Pin SOP Package...