w77e58 Winbond Electronics Corp America, w77e58 Datasheet - Page 11

• Manufacturer Part Number: w77e58
• Description: 8 Bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

Special Function Registers
The W77E58 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 W77E58 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
Note: The SFRs in the column with dark borders are bit-addressable.
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
TL1
DPH
- 11 -
TL2
PMR
TH0
DPL1
Preliminary W77E58
Publication Release Date: March 1999
TH2
STATUS
P4
TH1
DPH1
CKCON
DPS
Revision A1
TA
PCON