W77LE532_07 Datasheet, PDF (11/88 Pages) Winbond – 8-BIT MICROCONTROLLER

W77LE532/W77L532A
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. Besides, it has internal pull-up resisters
enabled by setting P0UP of P4CSIN (A2H) to high.
STACK POINTER
Bit:
7
SP.7
6
SP.6
5
SP.5
4
SP.4
3
SP.3
2
SP.2
1
SP.1
0
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.
DATA POINTER LOW
Bit:
7
6
5
4
3
2
1
0
DPL.7 DPL.6 DPL.5 DPL.4 DPL.3 DPL.2 DPL.1 DPL.0
Mnemonic: DPL
Address: 82h
This is the low byte of the standard 8052 16-bit data pointer.
DATA POINTER HIGH
Bit:
7
DPH.7
Mnemonic: DPH
6
DPH.6
5
DPH.5
4
DPH.4
3
2
1
DPH.3 DPH.2 DPH.1
Address: 83h
0
DPH.0
This is the high byte of the standard 8052 16-bit data pointer.
DATA POINTER LOW1
Bit:
7
6
5
4
3
2
1
0
DPL1.7 DPL1.6 DPL1.5 DPL1.4 DPL1.3 DPL1.2 DPL1.1 DPL1.0
Mnemonic: DPL1
Address: 84h
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Publication Release Date: February 1, 2007
Revision A7