MC81F4332 Datasheet, PDF (140/198 Pages) Finechips – ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

MC81F4x16
21.1 Registers
BUZR
BUZZER DRIVER REGISTER
00E5H
7
6
5
4
3
2
1
0
BUZR
BUCK
BUSS BURL –
–
–
– Reset value: C-H
R/W R/W R/W R/W –
–
–
–
BUCK Buzzer Clock Selection Bit
BUSS Buzzer Start/Stop Bit
BURL
–
Buzzer Data Reload Bit
bit3 – bit1
00: fxt ( sub clock )
01: fxx/16
10: fxx/32
11: fxx/64
0: Disable Buzzer
1: Enable Buzzer
0: No effect
1: Reload buzzer data to buffer
Not used for MC81F4x32
BUPDR
BUZZER PERIOD DATA REGISTER
00E6H
BUPDR
7
6
5
4
3
2
1
0
One byte register
Reset value: FFH
R/W R/W R/W R/W R/W R/W R/W R/W
A 8-bit data register for the buzzer period value.
140
October 19, 2009 Ver.1.35