Philips Semiconductors

Product specification

OM5232

CMOS single-chip 8-bit microcontroller

December 1994

4

Table 1.

OM5232 Special Function Registers

SYMBOL

DESCRIPTION

DIRECT

ADDRESS

BIT ADDRESS, SYMBOL, OR ALTERNATIVE PORT FUNCTION

MSB

LSB

RESET

VALUE

ACC*

Accumulator

E0H

E7

E6

E5

E4

E3

E2

E1

E0

00H

B*

B Register

F0H

F7

F6

F5

F4

F3

F2

F1

F0

00H

DPTR:

DPH

DPL

Data Pointer

(2 bytes)

Data Pointer High

Data Pointer Low

83H

82H

00H

00H

AF

AE

AD

AC

AB

AA

A9

A8

IE*#

Interrupt Enable

A8H

EA

ES1

ES0

ET1

EX1

ET0

EX0

0x000000B

BF

BE

BD

BC

BB

BA

B9

B8

IP*#

Interrupt Priority

B8H

–

PS1

PS0

PT1

PX1

PT0

PX0

xx000000B

87

86

85

84

83

82

81

80

P0*

Port 0

80H

AD7

AD6

AD5

AD4

AD3

AD2

AD1

AD0

FFH

97

96

95

94

93

92

91

90

P1*#

Port 1

90H

SDA

SCL

FFH

A7

A6

A5

A4

A3

A2

A1

A0

P2*

Port 2

A0H

A15

A14

A13

A12

A11

A10

A9

A8

FFH

B7

B6

B5

B4

B3

B2

B1

B0

P3*

Port 3

B0H

RD

WR

T1

T0

INT1

INT0

TXD

RXD

FFH

PCON

Power Control

87H

SMOD

–

–

–

GF1

GF0

PD

IDL

0xxx0000B

9F

9E

9D

9C

9B

9A

99

98

S0CON*#

Serial 0 Port Control

98H

SM0

SM1

SM2

REN

TB8

RB8

TI

RI

00H

S0BUF#

Serial 0 Data Buffer

99H

xxxxxxxxB

D7

D6

D5

D4

D3

D2

D1

D0

PSW*

Program Status Word

D0H

CY

AC

F0

RS1

RS0

OV

F1

P

00H

reserved (Note 1)

DAH

00H

SP

Stack Pointer

81H

07H

reserved (Note 1)

DBH

00H

reserved (Note 1)

D9H

F8H

reserved (Note 1)

D8H

00000000B

8F

8E

8D

8C

8B

8A

89

88

TCON*

Timer Control

88H

TF1

TR1

TF0

TR0

IE1

IT1

IE0

IT0

00H

TH1

Timer High 1

8DH

00H

TH0

Timer High 0

8CH

00H

TL1

Timer Low 1

8BH

00H

TL0

Timer Low 0

8AH

00H

TMOD

Timer Mode

89H

GATE

C/T

M1

M0

GATE

C/T

M1

M0

00H

*

SFRs are bit addressable.

#

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

NOTE