Philips Semiconductors

Product specification

83C750/87C750

80C51 8-bit microcontroller family

1K/64 OTP/ROM, low pin count

1998 May 01

6

Table 2.

87C750 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)

High byte

Low byte

83H

82H

00H

00H

AF

AE

AD

AC

AB

AA

A9

A8

IE*#

Interrupt enable

A8H

EA

–

–

–

–

EX1

ET0

EX0

00H

82

81

80

P0*#

Port 0

80H

–

–

–

–

–

–

–

–

xxxxx111B

97

96

95

94

93

92

91

90

P1*

Port 1

90H

T0

INT1

INT0

–

–

–

–

–

FFH

P3*

Port 3

B0H

B7

B6

B5

B4

B3

B2

B1

B0

FFH

PCON#

Power control

87H

–

–

–

–

–

–

PD

IDL

xxxxxx00B

D7

D6

D5

D4

D3

D2

D1

D0

PSW*

Program status word

D0H

CY

AC

F0

RS1

RS0

OV

–

P

00H

SP

Stack pointer

81H

07H

8F

8E

8D

8C

8B

8A

89

88

TCON*#

Timer/counter control

88H

GATE

C/T

TF

TR

IE0

IT0

IE1

IT1

00H

TL#

Timer low byte

8AH

00H

TH#

Timer high byte

8CH

00H

RTL#

Timer low reload

8BH

00H

RTH#

Timer high reload

8DH

00H

*

SFRs are bit addressable.

#

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

PARAMETER

RATING

UNIT

Storage temperature range

–65 to +150

°C

–0.5 to +6.5

V

V

Power dissipation

1.0

W

0 to +13.0

V

10

mA

NOTES:

1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and

functional operation of the device at these or any conditions other than those described in the AC and DC Electrical Characteristics section

of this specification is not implied.

2. This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive static

charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maxima.