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| AT89C51AC3_08 Datasheet, PDF (14/140 Pages) ATMEL Corporation – Enhanced 8-bit Microcontroller with 64KB Flash Memory | |||
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Table 1. SFR Mapping
0/8(2)
1/9
2/A
3/B
4/C
5/D
6/E
7/F
F8h
IPL1
xxxx x0x0
CH
0000 0000
CCAP0H
0000 0000
CCAP1H
0000 0000
CCAP2H
0000 0000
CCAP3H
0000 0000
CCAP4H
0000 0000
FFh
F0h
B
0000 0000
ADCLK
xxx0 0000
ADCON
x000 0000
ADDL
0000 0000
ADDH
0000 0000
ADCF
0000 0000
IPH1
xxxx x0x0
F7h
E8h
IEN1
xxxx x0x0
CL
0000 0000
CCAP0L
0000 0000
CCAP1L
0000 0000
CCAP2L
0000 0000
CCAP3L
0000 0000
CCAP4L
0000 0000
EFh
E0h
ACC
0000 0000
E7h
D8h
CCON
0000 0000
CMOD
00xx x000
CCAPM0
x000 0000
CCAPM1
x000 0000
CCAPM2
x000 0000
CCAPM3
x000 0000
CCAPM4
x000 0000
DFh
D0h
PSW
0000 0000
FCON
0000 0000
EECON
xxxx xx00
FSTA
xxxx xx00
SPCON
0001 0100
SPSCR
0000 0000
SPDAT
xxxx xxxx
D7h
C8h
T2CON
0000 0000
T2MOD
xxxx xx00
RCAP2L
0000 0000
RCAP2H
0000 0000
TL2
0000 0000
TH2
0000 0000
CFh
C0h
P4
xxx1 1111
C7h
B8h
IPL0
x000 0000
SADEN
0000 0000
BFh
B0h
P3
1111 1111
IPH0
x000 0000
B7h
A8h
IEN0
0000 0000
SADDR
0000 0000
AFh
A0h
P2
1111 1111
AUXR1
xxxx 00x0
WDTRST
1111 1111
WDTPRG
xxxx x000
A7h
98h
SCON
0000 0000
SBUF
0000 0000
CKCON1
xxxx xxx0
9Fh
90h
P1
1111 1111
97h
88h
TCON
0000 0000
TMOD
0000 0000
TL0
0000 0000
TL1
0000 0000
TH0
0000 0000
TH1
0000 0000
AUXR
x001 0100
CKCON0
x00 0000
8Fh
80h
P0
1111 1111
SP
0000 0111
DPL
0000 0000
DPH
0000 0000
PCON
00x1 0000
87h
0/8(2)
1/9
2/A
3/B
4/C
5/D
6/E
7/F
Reserved
Note: 1. Do not read or write Reserved Registers
2. These registers are bitâaddressable.
Sixteen addresses in the SFR space are both byteâaddressable and bitâaddressable. The bitâaddressable SFRâs are those
whose address ends in 0 and 8. The bit addresses, in this area, are 0x80 through to 0xFF.
14 AT89C51AC3
4383Dâ8051â02/08
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