Z51F0410 Datasheet, PDF (138/184 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F0410
Product Specification
4.10.2 Block Diagram
÷32
fx
Pre
scaler
÷64
÷128
MUX
÷256
BUZCR[2:1] ²
Selection Input
Clock
Buzzer Control Register
[96H] BUZCR
8-bit Up-counter
Counter
Overflow
BUZCR[0]
F/F
BUZO PIN
Counter
BUZDR
Writing to BUZDR
RESET
Buzzer Data Register
[8FH]
Figure 4-38 Buzzer Driver Block Diagram
4.10.3 Register Map
Name
BUZDR
BUZCR
Address
8FH
96H
Dir
R/W
R/W
Default
FFH
00H
Description
Buzzer Data Register
Buzzer Control Register
Table 11-13 Register Map
4.10.4 Buzzer Driver Register description
Buzzer Driver consists of Buzzer Data Register (BUZDR), Buzzer Control Register (BUZCR).
4.10.5 Register description for Buzzer Driver
BUZDR (Buzzer Data Register) : 8FH
7
BUZDR7
R/W
6
BUZDR6
R/W
5
BUZDR5
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) : 96H
7
6
5
4
-
-
-
-
-
-
-
-
3
2
-
BUCK1
-
R/W
PS029502-0212
BUCK[1:0] Buzzer Driver Source Clock Selection
PRELIMINARY
1
BUCK0
R/W
0
BUZEN
R/W
Initial value : 00H
135