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參數(shù)資料
型號: W77C58
廠商: WINBOND ELECTRONICS CORP
元件分類: 8位微控制器
英文描述: 8 BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 8/71頁
文件大小: 516K
代理商: W77C58
Preliminary W77C58
- 8 -
Special Function Registers
The W77C58 uses Special Function Registers (SFRs) to control and monitor peripherals and their
Modes.
The SFRs reside in the register locations 80-FFh and are accessed by direct addressing only. Some
of the SFRs are bit addressable. This is very useful in cases where one wishes to modify a particular
bit without changing the others. The SFRs that are bit addressable are those whose addresses end in
0 or 8. The W77C58 contains all the SFRs present in the standard 8052. However, some additional
SFRs have been added. In some cases unused bits in the original 8052 have been given new
functions. The list of SFRs is as follows. The table is condensed with eight locations per row. Empty
locations indicate that there are no registers at these addresses. When a bit or register is not
implemented, it will read high.
Table 1. Special Function Register Location Table
F8
F0
E8
E0
D8
D0
C8
C0
B8
B0
A8
A0
98
90
88
80
EIP
B
EIE
ACC
WDCON
PSW
T2CON
SCON1
IP
P3
IE
P2
SCON0
P1
TCON
P0
T2MOD
SBUF1
SADEN
SADDR
SBUF
EXIF
TMOD
SP
RCAP2L
ROMMAP
SADEN1
SADDR1
TL0
DPL
RCAP2H
TL2
PMR
TH0
DPL1
TH2
STATUS
P4
TH1
DPH1
CKCON
DPS
TA
PCON
TL1
DPH
Note: The SFRs in the column with dark borders are bit-addressable.
A brief description of the SFRs now follows.
Port 0
Bit:
7
6
5
4
3
2
1
0
P0.7
P0.6
P0.5
P0.4
P0.3
P0.2
P0.1
P0.0
Mnemonic: P0
Address: 80h
Port 0 is an open-drain bi-directional I/O port. This port also provides a multiplexed low order
address/data bus during accesses to external memory.
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