P89C51X2 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

P89C51X2

8-bit Flash microcontroller family 4K/8K/16K/32K Flash

Philips Electronics 

Philips Semiconductors

80C51 8-bit Flash microcontroller family

4K/8K/16K/32K Flash

Preliminary data

P89C51X2/52X2/54X2/58X2

Table 1.

SYMBOL

ACC*

AUXR#

AUXR1#

B*

CKCON

DPTR:

DPH

DPL

IE*

IP*

IPH#

P0*

P1*

P2*

P3*

Special Function Registers

DESCRIPTION

DIRECT

BIT ADDRESS, SYMBOL, OR ALTERNATIVE PORT FUNCTION

ADDRESS MSB

LSB

Accumulator

E0H

E7

E6

E5

E4

E3

E2

E1

E0

Auxiliary

8EH

–

–

–

–

–

–

–

AO

Auxiliary 1

A2H

–

–

–

–

WUPD

0

–

DPS

B register

F0H

F7

F6

F5

F4

F3

F2

F1

F0

Clock Control Register 8FH

–

–

–

–

–

–

–

X2

Data Pointer (2 bytes)

Data Pointer High

83H

Data Pointer Low

82H

AF

AE

AD

AC

AB

AA

A9

A8

Interrupt Enable

A8H

EA

–

ET2

ES

ET1 EX1 ET0 EX0

BF

BE

BD

BC

BB

BA

B9

B8

Interrupt Priority

B8H

–

–

PT2

PS

PT1 PX1 PT0 PX0

Interrupt Priority High

B7H

–

–

PT2H PSH PT1H PX1H PT0H PX0H

87

86

85

84

83

82

81

80

Port 0

80H

AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0

97

96

95

94

93

92

91

90

Port 1

90H

–

–

–

–

–

– T2EX T2

A7

A6

A5

A4

A3

A2

A1

A0

Port 2

A0H AD15 AD14 AD13 AD12 AD11 AD10 AD9 AD8

B7

B6

B5

B4

B3

B2

B1

B0

Port 3

B0H

RD

WR

T1

T0

INT1 INT0 TxD RxD

RESET

VALUE

00H

xxxxxxx0B

xxx000x0B

00H

xxx00000B

00H

00H

0x000000B

xx000000B

xx000000B

FFH

FFH

FFH

FFH

PCON#1 Power Control

87H SMOD1 SMOD0

–

POF GF1 GF0 PD

IDL

D7

D6

D5

D4

D3

D2

D1

D0

PSW*

Program Status Word

D0H

CY

AC

F0

RS1

RS0

OV

–

P

RACAP2H# Timer 2 Capture High

RACAP2L# Timer 2 Capture Low

CBH

CAH

SADDR# Slave Address

A9H

SADEN# Slave Address Mask

B9H

SBUF

Serial Data Buffer

99H

9F

9E

9D

9C

9B

9A

99

98

SCON*

Serial Control

98H SM0/FE SM1 SM2 REN

TB8

RB8

TI

RI

SP

Stack Pointer

81H

8F

8E

8D

8C

8B

8A

89

88

TCON*

Timer Control

88H

TF1

TR1

TF0

TR0

IE1

IT1 IE0

IT0

CF

CE

CD

CC

CB

CA

C9

C8

T2CON* Timer 2 Control

C8H

TF2 EXF2 RCLK TCLK EXEN2 TR2 C/T2 CP/RL2

T2MOD# Timer 2 Mode Control

C9H

–

–

–

–

–

– T2OE DCEN

TH0

Timer High 0

8CH

TH1

Timer High 1

8DH

TH2#

Timer High 2

CDH

TL0

Timer Low 0

8AH

TL1

Timer Low 1

8BH

TL2#

Timer Low 2

CCH

TMOD

Timer Mode

89H GATE C/T

M1

M0 GATE C/T M1

M0

NOTE:

Unused register bits that are not defined should not be set by the user’s program. If violated, the device could function incorrectly.

* SFRs are bit addressable.

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

– Reserved bits.

1. Reset value depends on reset source.

00xx0000B

000000x0B

00H

00H

00H

00H

xxxxxxxxB

00H

07H

00H

00H

xxxxxx00B

00H

00H

00H

00H

00H

00H

00H

2002 Jun 06

10

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