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P89C51RD

80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM

Philips Electronics 

Philips Semiconductors

80C51 8-bit Flash microcontroller family

8KB/16KB/32KB/64KB ISP/IAP Flash with 512B/512B/512B/1KB RAM

Preliminary data

P89C51RA2/RB2/RC2/RD2xx

Table 1. Special Function Registers

SYMBOL

ACC*

AUXR#

AUXR1#

B*

CCAP0H#

CCAP1H#

CCAP2H#

CCAP3H#

CCAP4H#

CCAP0L#

CCAP1L#

CCAP2L#

CCAP3L#

CCAP4L#

DESCRIPTION

Accumulator

Auxiliary

Auxiliary 1

B register

Module 0 Capture High

Module 1 Capture High

Module 2 Capture High

Module 3 Capture High

Module 4 Capture High

Module 0 Capture Low

Module 1 Capture Low

Module 2 Capture Low

Module 3 Capture Low

Module 4 Capture Low

DIRECT

ADDRESS

E0H

8EH

A2H

F0H

FAH

FBH

FCH

FDH

FEH

EAH

EBH

ECH

EDH

EEH

BIT ADDRESS, SYMBOL, OR ALTERNATIVE PORT FUNCTION

MSB

LSB

E7

E6

E5

E4

E3

E2

E1

E0

–

–

–

–

–

–

EXTRAM

AO

–

–

ENBOOT

–

GF2

0

–

DPS

F7

F6

F5

F4

F3

F2

F1

F0

CCAPM0#

CCAPM1#

CCAPM2#

CCAPM3#

CCAPM4#

Module 0 Mode

Module 1 Mode

Module 2 Mode

Module 3 Mode

Module 4 Mode

DAH

DBH

DCH

DDH

DEH

–

ECOM CAPP CAPN MAT TOG PWM ECCF

–

ECOM CAPP CAPN MAT TOG PWM ECCF

–

ECOM CAPP CAPN MAT TOG PWM ECCF

–

ECOM CAPP CAPN MAT TOG PWM ECCF

–

ECOM CAPP CAPN MAT TOG PWM ECCF

CCON*#

CH#

CKCON#

CL#

CMOD#

PCA Counter Control

PCA Counter High

Clock control

PCA Counter Low

PCA Counter Mode

D8H

F9H

8FH

E9H

D9H

DF

DE

DD

DC

DB

DA

D9

D8

CF

CR

–

CCF4 CCF3 CCF2 CCF1 CCF0

–

WDX2 PCAX2 SIX2 T2X2 T1X2 T0X2

X2

CIDL WDTE

–

–

–

CPS1 CPS0 ECF

DPTR:

DPH

DPL

IE*

Data Pointer (2 bytes)

Data Pointer High

83H

Data Pointer Low

82H

Interrupt Enable 0

A8H

IP*

IPH#

Interrupt Priority

B8H

Interrupt Priority High

B7H

AF

AE

AD

AC

AB

AA

A9

A8

EA

EC

ET2

ES

ET1 EX1 ET0

EX0

BF

BE

BD

BC

BB

BA

B9

B8

–

PPC PT2

PS

PT1 PX1 PT0

PX0

–

PPCH PT2H PSH PT1H PX1H PT0H PX0H

RESET

VALUE

00H

xxxxxx00B

xxxxxxx0B

00H

xxxxxxxxB

xxxxxxxxB

xxxxxxxxB

xxxxxxxxB

xxxxxxxxB

xxxxxxxxB

xxxxxxxxB

xxxxxxxxB

xxxxxxxxB

xxxxxxxxB

x0000000B

x0000000B

x0000000B

x0000000B

x0000000B

00x00000B

00H

x0000000B

00H

00xxx000B

00H

00H

00H

x0000000B

x0000000B

P0*

Port 0

P1*

Port 1

P2*

Port 2

P3*

Port 3

87

86

85

84

83

82

81

80

80H

AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFH

97

96

95

94

93

92

91

90

90H

CEX4 CEX3 CEX2 CEX1 CEX0 ECI T2EX

T2 FFH

A7

A6

A5

A4

A3

A2

A1

A0

A0H AD15 AD14 AD13 AD12 AD11 AD10 AD9 AD8 FFH

B7

B6

B5

B4

B3

B2

B1

B0

B0H

RD

WR

T1

T0

INT1 INT0 TxD RxD FFH

PCON#1 Power Control

87H SMOD1 SMOD0

–

* SFRs are bit addressable.

# SFRs are modified from or added to the 80C51 SFRs.

– Reserved bits.

1. Reset value depends on reset source.

POF GF1 GF0

PD

IDL 00xxx000B

2002 Jul 18

9

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