AT89C51RB2-3CSUM Ver la hoja de datos (PDF) - Atmel Corporation

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AT89C51RB2-3CSUM

8-bit Microcontroller with 16K/32K Bytes Flash

Atmel Corporation 

AT89C51RB2/RC2

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

7

6

5

4

3

2

1

0

CY

AC

F0

RS1

RS0

OV

F1

P

Table 3. System Management SFRs

Mnemonic Add Name

PCON

87h Power Control

AUXR

8Eh Auxiliary Register 0

AUXR1

A2h Auxiliary Register 1

CKRL

97h Clock Reload Register

CKCKON0 8Fh Clock Control Register 0

CKCKON1 AFh Clock Control Register 1

7

SMOD1

DPU

-

CKRL7

-

-

6

SMOD0

-

-

CKRL6

WDTX2

-

5

-

M0

ENBOOT

CKRL5

PCAX2

-

4

POF

XRS2

-

CKRL4

SIX2

-

3

GF1

XRS1

GF3

CKRL3

T2X2

-

2

GF0

XRS0

0

CKRL2

T1X2

-

1

PD

EXTRAM

-

CKRL1

T0X2

-

0

IDL

AO

DPS

CKRL0

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

EI2C

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 IE2CH KBDH

IPL1

B2h Interrupt Priority Control Low 1

-

-

-

-

-

SPIL

IE2CL KBDL

Table 5. Port SFRs

Mnemonic Add Name

P0

80h 8-bit Port 0

P1

90h 8-bit Port 1

P2

A0h 8-bit Port 2

P3

B0h 8-bit Port 3

7

6

5

4

3

2

1

0

5

4180E–8051–10/06

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