at89c51ac3-s3sim ATMEL Corporation, at89c51ac3-s3sim Datasheet - Page 14

• Manufacturer Part Number: at89c51ac3-s3sim
• Description: At89c51ac3 Enhanced 8-bit Microcontroller With 64kb Flash Memory
• Manufacturer: ATMEL Corporation

Table 1. SFR Mapping
Reserved
Note:
14
D8h
D0h
C8h
C0h
F8h
F0h
E8h
E0h
B8h
B0h
A8h
A0h
98h
90h
88h
80h
1. Do not read or write Reserved Registers
2. These registers are bit
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
x000 0000
0000 0000
0000 0000
0000 0000
xxxx x0x0
xxxx x0x0
xxx1 1111
1111 1111
1111 1111
1111 1111
1111 1111
T2CON
CCON
SCON
TCON
AT89C51AC3
0/8
IEN1
PSW
IEN0
0/8
IPL1
ACC
IPL0
Sixteen addresses in the SFR space are both byte
whose address ends in 0 and 8. The bit addresses, in this area, are 0x80 through to 0xFF.
P4
P3
P2
P1
P0
B
(2)
(2)
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
00xx x000
0000 0111
xxxx xx00
T2MOD
SADEN
SADDR
CMOD
FCON
TMOD
SBUF
CH
1/9
CL
SP
1/9
–
addressable.
0000 0000
0000 0000
x000 0000
0000 0000
0000 0000
0000 0000
xxx0 0000
xxxx xx00
xxxx 00x0
CCAPM0
CCAP0H
CCAP0L
RCAP2L
EECON
ADCLK
AUXR1
DPL
TL0
2/A
2/A
0000 0000
x000 0000
0000 0000
x000 0000
0000 0000
0000 0000
0000 0000
xxxx xx00
CCAP1H
CCAPM1
RCAP2H
CCAP1L
ADCON
FSTA
DPH
TL1
3/B
3/B
–
addressable and bit
0000 0000
0000 0000
0000 0000
x000 0000
0001 0100
0000 0000
0000 0000
CCAPM2
CCAP2H
CCAP2L
SPCON
ADDL
TH0
TL2
4/C
4/C
–
addressable. The bit
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
x000 0000
CCAPM3
CCAP3H
CCAP3L
SPSCR
ADDH
TH2
TH1
5/D
5/D
0000 0000
0000 0000
0000 0000
x000 0000
x001 0100
xxxx xxxx
WDTRST
1111 1111
CCAPM4
CCAP4H
CCAP4L
SPDAT
AUXR
ADCF
6/E
6/E
–
addressable SFR’s are those
4383D–8051–02/08
x000 0000
00x1 0000
WDTPRG
xxxx x000
xxxx x0x0
xxxx xxx0
CKCON1
CKCON0
x00 0000
PCON
IPH1
IPH0
7/F
7/F
DFh
CFh
FFh
F7h
EFh
E7h
D7h
C7h
BFh
B7h
AFh
A7h
9Fh
8Fh
97h
87h