W925E625 Datasheet, PDF (13/75 Pages) Winbond – 8-bit CID MICROCONTROLLER

W925E/C625
A brief description of the SFRs now follows.
PORT 0
(initial=FFH,input mode)
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
P0: P0 can be selected as input or output mode by the P0IO register, at initial reset, P0IO is set to
FFH, P0 is used as input mode. When P0IO is set to 0, the P0 is used as CMOS open drain
mode.
STACK POINTER
(initial=07H)
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
SP: 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
(initial=00H)
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
DPL: This is the low byte of the standard 8052 16-bit data pointer.
Address: 82h
DATA POINTER HIGH
(initial=00H)
Bit:
7
6
5
4
3
2
1
0
DPH.7 DPH.6 DPH.5 DPH.4 DPH.3 DPH.2 DPH.1 DPH.0
Mnemonic: DPH
DPH: This is the high byte of the standard 8052 16-bit data pointer.
Address: 83h
DATA POINTER LOW1
(initial=00H)
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: July 4, 2005
Revision A10