Z51F3220FNX Datasheet, PDF (174/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
11.9.3 Register Map
Table 11-16 Buzzer Driver Register Map
Name
Address
Dir
BUZDR
8FH
R/W
BUZCR
97H
R/W
Default
FFH
00H
Description
Buzzer Data Register
Buzzer Control Register
11.9.4 Buzzer Driver Register Description
Buzzer driver consists of buzzer data register (BUZDR) and buzzer control register (BUZCR).
11.9.5 Register Description for Buzzer Driver
BUZDR (Buzzer Data Register) : 8FH
7
6
5
BUZDR7
BUZDR6
BUZDR5
R/W
R/W
R/W
4
BUZDR4
R/W
3
BUZDR3
R/W
2
BUZDR2
R/W
BUZDR[7:0] This bits control the Buzzer frequency
Its resolution is 00H ~ FFH
1
0
BUZDR1
BUZDR0
R/W
R/W
Initial value : FFH
BUZCR (Buzzer Control Register) : 97H
7
6
5
4
–
–
–
–
–
–
–
–
3
2
–
BUCK1
–
R/W
BUCK[1:0]
BUZEN
Buzzer Driver Source Clock Selection
BUCK1 BUCK0 Description
0
0
fx/32
0
1
fx/64
1
0
fx/128
1
1
fx/256
Buzzer Driver Operation Control
0
Buzzer Driver disable
1
Buzzer Driver enable
NOTE) fx: System clock oscillation frequency.
1
BUCK0
R/W
0
BUZEN
R/W
Initial value : 00H
PS029902-0212
PRELIMINARY
171