W79E201 Datasheet, PDF (9/87 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E201
Special Function Registers
The W79E201 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 W79E201 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 ADCCON ADCH
D8 ^{WDCON PWMP}
PWM0
D0
PSW
PWM1
ADCCEN
PWMCON
1
C8 ^{T2CON T2MOD RCAP2L RCAP2H}
TL2
C0
PWM5
PMR
B8
IP
SADEN
B0
P3
A8
IE
SADDR
SFRAL
A0
P2
98
SCON
SBUF
90
P1
88 ^{TCON TMOD}
TL0
TL1
TH0
80
P0
SP
DPL
DPH
Note: The SFRs in the column with dark borders are bit-addressable.
PWM2
TH2
Status
SFRAH
P4
TH1
PWM3
PWMCON
2
PWM4
TA
SFRFD SFRCN
CHPCON
CKCON
P0R
PCON
Publication Release Date: December 16, 2004
-9-
Revision A2