W77IE58 Datasheet, PDF (13/90 Pages) Winbond – 8-BIT MICROCONTROLLER

Preliminary W77IE58
Table 1. Special Function Register Location Table
F8 EIP
F0 B
E8 EIE
E0 ACC
D8 WDCON
D0 PSW
C8 T2CON T2MOD RCAP2L RCAP2H TL2
C0 SCON1 SBUF1 ROMMAP
PMR
B8 IP
SADEN SADEN1
B0 P3
A8 IE
SADDR SADDR1
A0 P2
98 SCON0 SBUF
90 P1
EXIF
88 TCON
TMOD
TL0
TL1
TH0
80 P0
SP
DPL
DPH
DPL1
Note: The SFRs in the column with dark borders are bit-addressable.
A brief description of the SFRs now follows.
TH2
STATUS
TA
P4
TH1
DPH1
CKCON
DPS
PCON
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.
Stack Pointer
Bit:
7
6
5
4
3
2
1
0
SP.7 SP.6 SP.5 SP.4 SP.3 SP.2 SP.1 SP.0
Mnemonic: SP
Address: 81h
The Stack Pointer stores the Scratchpad RAM address where the stack begins. In other words, it
always points to the top of the stack.
- 13 -
Publication Release Date: July 2000
Revision A1