T89C51RD2-3CBC-L ATMEL [ATMEL Corporation], T89C51RD2-3CBC-L Datasheet - Page 3

• Manufacturer Part Number: T89C51RD2-3CBC-L
• Description: 0 to 40MHz Flash Programmable 8-bit Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

4. SFR Mapping
The Special Function Registers (SFRs) of the T89C51RD2 fall into the following categories:
Table below shows all SFRs with their address and their reset value.
Rev. F - 15 February, 2001
E8h
E0h
D8h
D0h
C8h
C0h
B8h
B0h
A8h
A0h
F8h
F0h
98h
90h
88h
80h
C51 core registers: ACC, B, DPH, DPL, PSW, SP, AUXR1
I/O port registers: P0, P1, P2, P3, P4, P5
Timer registers: T2CON, T2MOD, TCON, TH0, TH1, TH2, TMOD, TL0, TL1, TL2, RCAP2L, RCAP2H
Serial I/O port registers: SADDR, SADEN, SBUF, SCON
Power and clock control registers: PCON
Hardware Watchdog Timer register: WDTRST, WDTPRG
Interrupt system registers: IE, IP, IPH
Flash and EEPROM registers: FCON, EECON, EETIM
Others: AUXR, AUXR1, CKCON
address-
00X0 0000
0000 0000
1111 1111
0000 0000
0000 0000
0000 0000
1111 1111
1111 1111
0000 0000
1111 1111
0000 0000
1111 1111
0000 0000
1111 1111
X000 000
T2CON
CCON
TCON
able
SCON
ACC
PSW
Bit
0/8
P5
P4
P3
P2
P1
P0
0/8
IE
B
IP
XXXX XXXX
XXXX XX00
XXXX 0000
00XX X000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0111
T2MOD
SADDR
SADEN
CMOD
TMOD
FCON
SBUF
CH
CL
1/9
SP
1/9
XXXX XXXX
XXXX XXXX
XXXX XX00
XXXX 00X0
X000 0000
0000 0000
0000 0000
0000 0000
CCAPM0
CCAP0H
CCAP0L
RCAP2L
EECON
AUXR1
DPL
TL0
2/A
2/A
XXXX XXXX
XXXX XXXX
X000 0000
0000 0000
0000 0000
0000 0000
0000 0000
CCAPM1
CCAP1H
RCAP2H
CCAP1L
EETIM
DPH
TL1
3/B
3/B
Non Bit addressable
XXXX XXXX
XXXX XXXX
X000 0000
CCAPL2H
CCAPL2L
0000 0000
0000 0000
CCAPM2
TL2
TH0
4/C
4/C
XXXX XXXX
XXXX XXXX
X000 0000
CCAPL3H
0000 0000
0000 0000
CCAPL3L
CCAPM3
TH2
TH1
5/D
5/D
T89C51RD2
XXXX XXXX
XXXX XXXX
XXXX XXXX
XX0X 1000
X000 0000
CCAPL4H
CCAPL4L
CCAPM4
WDTRST
AUXR
6/E
6/E
XXXX X000
X000 0000
X000 0000
00X1 0000
1111 1111
WDTPRG
CKCON
PCON
IPH
P5
7/F
7/F
DFh
AFh
FFh
EFh
E7h
D7h
CFh
C7h
BFh
B7h
A7h
F7h
9Fh
97h
8Fh
87h
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