Panasonic MN101C77C, F77G user manual Buzzer Output Frequency, BUZS2 BUZS1 BUZS0

Chapter 10 Buzzer

10-3 Operation

10-3-1 Operation

„Buzzer

Buzzer outputs the square wave, having a frequency 1/29 to 1/214 of the high speed oscillation clock (fosc), or by 1/23 to 1/24 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).

Table 10-3-1 Buzzer Output Frequency

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

X - 4 Operation