W77E058A Datasheet, PDF (11/87 Pages) Winbond – 8-BIT MICROCONTROLLER

W77E058A
7. SPECIAL FUNCTION REGISTERS
The W77E058 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 W77E058 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 EIP
F0 B
E8 EIE
E0 ACC
D8 WDCON
D0 PSW
C8 T2CON
C0 SCON1
B8 IP
B0 P3
A8 IE
A0 P2
98 SCON0
90 P1
88 TCON
80 P0
T2MOD
SBUF1
SADEN
RCAP2L RCAP2H
ROMMAP
SADEN1
SADDR SADDR1
SBUF
EXIF
TMOD
TL0
SP
DPL
TL1
DPH
TL2
PMR
TH0
DPL1
Note: The SFRs in the column with dark borders are bit-addressable.
TH2
STATUS
TA
P4
TH1
DPH1
CKCON
DPS
PCON
- 11 -
Publication Release Date: April 17, 2007
Revision A10