AT89C51IC2 Datasheet, PDF (5/147 Pages) ATMEL Corporation – 8-bit Flash Microcontroller with 2-wire Interface

AT89C51IC2
Table 2. C51 Core SFRs
Mnemonic Add Name
ACC
E0h Accumulator
B
F0h B Register
PSW
D0h Program Status Word
SP
81h Stack Pointer
DPL
82h Data Pointer Low byte
DPH
83h Data Pointer High byte
Table 3. System Management SFRs
Mnemonic Add Name
PCON
87h Power Control
AUXR
8Eh Auxiliary Register 0
AUXR1
CKRL
CKSEL
OSCON
CKCKON0
CKCKON1
A2h Auxiliary Register 1
97h Clock Reload Register
85h Clock Selection Register
86h Oscillator Control Register
8Fh Clock Control Register 0
AFh Clock Control Register 1
7
6
5
4
3
2
1
0
CY
AC
F0
RS1
RS0
OV
F1
P
7
6
5
4
SMOD1 SMOD0
-
-
-
-
M0
-
-
-
-
TWIX2
-
-
ENBOO
T
-
-
-
-
-
-
WDTX2 PCAX2
-
-
-
-
-
-
SIX2
-
3
2
1
0
GF1
GF0
PD
IDL
XRS1
XRS0
EXTRA
M
AO
GF3
0
-
DPS
-
-
-
T2X2
-
-
-
-
-
-
CKS
SCLKT0 OscBEn OscAEn
T1X2
T0X2
X2
-
-
SPIX2
Table 4. Interrupt SFRs
Mnemonic Add Name
7
6
5
4
3
2
1
0
IEN0
A8h Interrupt Enable Control 0
EA
EC
ET2
ES
ET1
EX1
ET0
EX0
IEN1
B1h Interrupt Enable Control 1
-
-
-
-
-
ESPI
ETWI
KBD
IPH0
B7h Interrupt Priority Control High 0
-
PPCH
PT2H
PHS
PT1H
PX1H
PT0H
PX0H
IPL0
B8h Interrupt Priority Control Low 0
-
PPCL
PT2L
PLS
PT1L
PX1L
PT0L
PX0L
IPH1
B3h Interrupt Priority Control High 1
-
-
-
-
-
SPIH
TWIH KBDH
IPL1
B2h Interrupt Priority Control Low 1
-
-
-
-
-
SPIL
TWIL
KBDL
5
4301C–8051–06/06