Panasonic MN101C77C Manual De Usuario
Chapter 10 Buzzer
Operation
X - 4
10-3
Operation
10-3-1
Operation
Buzzer
Buzzer outputs the square wave, having a frequency 1/2
9
to 1/2
14
of the high speed oscillation clock
(fosc), or by 1/2
3
to 1/2
4
of the low speed oscillation clock (fx). The BUZS 2, 1, 0 flag of the oscillation
stabilization wait control register (DLYCTR) set the frequency of buzzer output. The BUZOE flag of the
oscillation stabilization wait control register (DLYCTR) sets buzzer output ON / OFF.
Buzzer Output Frequency
The frequency of buzzer output is decided by the frequency of the high oscillation clock (fosc) or the low
oscillation clock (fx) and the bit 6, 5, 4 (BUZS2, BUZS1, BUZS0) of the oscillation stabilization wait
control register (DLYCTR).
fosc
fx
BUZS2
BUZS1
BUZS0
Buzzer output frequency
20 MHz
-
0
0
0
1.22 kHz
20 MHz
-
0
0
1
2.44 kHz
20 MHz
-
0
1
0
4.88 kHz
8.38 MHz
-
0
1
0
2.05 kHz
8.38 MHz
-
0
1
1
4.09 kHz
2 MHz
-
1
0
0
1.95 kHz
2 MHz
-
1
0
1
3.91 kHz
-
32 kHz
1
1
0
2 kHz
-
32 kHz
1
1
1
4 kHz
Table 10-3-1 Buzzer Output Frequency