
11
AT89C51CC03
4182O–CAN–09/08
SFR Mapping
The Special Function Registers (SFRs) of the AT89C51CC03 fall into the following
categories:
Mnemonic
Add
Name
7
6543
210
ACC
E0h
Accumulator
–––
––
B
F0h
B Register
–––
––
PSW
D0h Program Status Word
CY
AC
F0
RS1
RS0
OV
F1
P
SP
81h
Stack Pointer
–––
––
DPL
82h
Data Pointer Low
byte
LSB of DPTR
–––
––
DPH
83h
Data Pointer High
byte
MSB of DPTR
–––
––
Mnemonic
Add
Name
7
6543
210
P0
80h
Port 0
–––
––
P1
90h
Port 1
–––
––
P2
A0h
Port 2
–––
––
P3
B0h
Port 3
–––
––
P4
C0h Port 4 (x5)
–
P4.4 /
MOSI
P4.3 /
SCK
P4.2 /
MISO
P4.1 /
RxDC
P4.0 /
TxDC
Mnemonic
Add
Name
7
6543
210
TH0
8Ch
Timer/Counter 0 High
byte
–––
––
TL0
8Ah
Timer/Counter 0 Low
byte
–––
––
TH1
8Dh
Timer/Counter 1 High
byte
–––
––
TL1
8Bh
Timer/Counter 1 Low
byte
–––
––
TH2
CDh
Timer/Counter 2 High
byte
–––
––
TL2
CCh
Timer/Counter 2 Low
byte
–––
––
TCON
88h
Timer/Counter 0 and
1 control
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
TMOD
89h
Timer/Counter 0 and
1 Modes
GATE1
C/T1#
M11
M01
GATE0
C/T0#
M10
M00