Operation - Panasonic F77G User Manual

Chapter 10 Buzzer
10-3

Operation

10-3-1 Operation
Buzzer
Buzzer outputs the square wave, having a frequency 1/2
3
(fosc), or by 1/2 to 1/2
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
20 MHz
20 MHz
20 MHz
8.38 MHz
8.38 MHz
2 MHz
2 MHz
-
-
X - 4
Operation
4
of the low speed oscillation clock (fx). The BUZS 2, 1, 0 flag of the oscillation
Table 10-3-1 Buzzer Output Frequency
fx BUZS2 BUZS1
- 0
- 0
- 0
- 0
- 0
- 1
- 1
32 kHz 1
32 kHz 1
9 14
to 1/2 of the high speed oscillation clock
BUZS0 Buzzer output frequency
0 0
0 1
1 0
1 0
1 1
0 0
0 1
1 0
1 1
1.22 kHz
2.44 kHz
4.88 kHz
2.05 kHz
4.09 kHz
1.95 kHz
3.91 kHz
2 kHz
4 kHz