MC81F4x16
21.1 Registers
BUZR
BUZZER DRIVER REGISTER
00E5H
7
6
5
4
3
2
1
0
–
–
BUCK
BUSS BURL
R/W R/W
–
–
–
BUZR
Reset value: C-H
R/W
R/W
–
–
–
00: fxt ( sub clock )
01: fxx/16
BUCK
BUSS
Buzzer Clock Selection Bit
Buzzer Start/Stop Bit
10: fxx/32
11: fxx/64
0: Disable Buzzer
1: Enable Buzzer
0: No effect
BURL
Buzzer Data Reload Bit
1: Reload buzzer data to buffer
Not used for MC81F4x16
–
bit3 – bit1
BUPDR
BUZZER PERIOD DATA REGISTER
00E6H
7
6
5
4
3
2
1
0
BUPDR
One byte register
R/W R/W
Reset value: FFH
R/W
R/W
R/W
R/W
R/W
R/W
A 8-bit data register for the buzzer period value.
142
October 19, 2009 Ver.1.35