AT89C5131A-M View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
AT89C5131A-M Datasheet PDF : 186 Pages
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AT89C5130A/31A-M
The Special Function Registers (SFRs) of the AT89C5131 fall into the following
categories:
Table 19. C51 Core SFRs
Mnemonic Add Name
7
6
5
4
3
2
1
0
ACC
B
E0h Accumulator
F0h B Register
PSW
D0h
Program Status
Word
SP
DPL
DPH
Stack Pointer
81h
LSB of SPX
Data Pointer
82h Low byte
LSB of DPTR
Data Pointer
83h High byte
MSB of DPTR
Table 20. I/O Port SFRs
Mnemonic Add Name
P0
80h Port 0
7
6
5
4
3
2
1
0
P1
90h Port 1
P2
A0h Port 2
P3
B0h Port 3
P4
C0h Port 4 (2bits)
21
4337G–USB–11/06
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