P80C31 View Datasheet(PDF) - Philips Electronics

Part Name

Description

View to exact match

P80C31

80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless low voltage (2.7V–5.5V), low power, high speed (33 MHz)

Philips Electronics 

Philips Semiconductors

80C51 8-bit microcontroller family

4K/128 OTP/ROM/ROMless, low voltage (2.7V–5.5V),

low power, high speed (33 MHz)

Product specification

80C51/87C51/80C31

Table 1.

SYMBOL

ACC*

AUXR#

AUXR1#

B*

DPTR:

DPH

DPL

IE*

IP*

IPH#

P0*

P1*

P2*

P3*

8XC51/80C31 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

Auxiliary 1

8EH

–

–

–

–

–

–

–

AO

A2H

–

–

–

LPEP2 WUPD3 0

–

DPS

B register

F0H

F7

F6

F5

F4

F3

F2

F1

F0

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

B7

B6

B5

B4

B3

B2

B1

B0

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

00H

00H

0x000000B

xx000000B

xx000000B

FFH

FFH

FFH

FFH

PCON#1 Power Control

87H SMOD1 SMOD0

–

POF GF1 GF0 PD

IDL 00xx0000B

D7

D6

D5

D4

D3

D2

D1

D0

PSW*

Program Status Word

D0H

CY

AC

F0

RS1

RS0

OV

–

P

000000x0B

RACAP2H# Timer 2 Capture High

CBH

00H

RACAP2L# Timer 2 Capture Low

CAH

00H

SADDR# Slave Address

A9H

00H

SADEN# Slave Address Mask

B9H

00H

SBUF

Serial Data Buffer

99H

xxxxxxxxB

9F

9E

9D

9C

9B

9A

99

98

SCON*

Serial Control

98H SM0/FE SM1 SM2 REN

TB8

RB8

TI

RI 00H

SP

Stack Pointer

81H

07H

8F

8E

8D

8C

8B

8A

89

88

TCON*

Timer Control

88H

TF1

TR1

TF0

TR0

IE1

IT1 IE0

IT0 00H

CF

CE

CD

CC

CB

CA

C9

C8

T2CON* Timer 2 Control

C8H

TF2 EXF2 RCLK TCLK EXEN2 TR2 C/T2 CP/RL2 00H

T2MOD# Timer 2 Mode Control

C9H

–

–

–

–

–

– T2OE DCEN xxxxxx00B

TH0

Timer High 0

8CH

00H

TH1

Timer High 1

8DH

00H

TH2#

Timer High 2

CDH

00H

TL0

Timer Low 0

8AH

00H

TL1

Timer Low 1

8BH

00H

TL2#

Timer Low 2

CCH

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.

– Reserved bits.

1. Reset value depends on reset source.

2. LPEP – Low Power EPROM operation (OTP/EPROM only)

3. Not available on 80C31.

2000 Jan 20

7

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