P87LPC779 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

P87LPC779

CMOS single-chip 8-bit 80C51 microcontroller with 128-byte data RAM, 8 kB OTP

Philips Electronics 

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Table 3: Special function registers…continued

* indicates SFRs that are bit addressable.

Name Description

SFR Bit functions and addresses

addr.

Reset

value

MSB

LSB Hex

Bit address BF

BE

BD

BC

BB

BA

B9

B8

IP0*

Interrupt priority 0

B8h

-

PWD

PBO

PS

PT1

PX1

PT0

PX0 00H

IP0H

Interrupt priority 0 HIGH

B7h

-

PWDH PBOH

PSH

PT1H

PX1H

PT0H

PX0H 00H

Bit address FF

FE

FD

FC

FB

FA

F9

F8

IP1*

Interrupt priority 1

F8h

PTI

-

PC1

PAD

-

PC2

PKB

PI2 00H

IP1H

Interrupt priority 1 HIGH

F7h

PTIH

-

PC1H

PADH

-

PC2H

PKBH

PI2H 00H

KBI

Keyboard Interrupt

86h

00H

Bit address 87

86

85

84

83

82

81

80

P0*

Port 0

80h

T1

CMP1 CMPREF CIN1A

CIN1B

CIN2A

CIN2B

CMP2 [1]

Bit address 97

96

95

94

93

92

91

90

P1*

Port 1

90h

DAC0 DAC1

RST

INT1

INT0

T0

RxD

TxD [1]

Bit address A7

A6

A5

A4

A3

A2

A1

A0

P2*

Port 2

A0h

-

-

-

-

-

-

X1

X2

[1]

P0M1 Port 0 output mode 1

84h (P0M1.7) (P0M1.6) (P0M1.5) (P0M1.4) (P0M1.3) (P0M1.2) (P0M1.1) (P0M1.0) 00H

P0M2 Port 0 output mode 2

85h (P0M2.7) (P0M2.6) (P0M2.5) (P0M2.4) (P0M2.3) (P0M2.2) (P0M2.1) (P0M2.0) 00H

P1M1 Port 1 output mode 1

91h (P1M1.7) (P1M1.6)

-

(P1M1.4)

-

-

(P1M1.1) (P1M1.0) 00H

P1M2 Port 1 output mode 2

92h (P1M2.7) (P1M2.6)

-

(P1M2.4)

-

-

(P1M2.1) (P1M2.0) 00H

P2M1 Port 2 output mode 1

A4h

P2S

P1S

P0S

ENCLK ENT1

ENT0 (P2M1.1) (P2M1.0) 00H

P2M2 Port 2 output mode 2

A5h

-

-

-

-

-

-

(P2M2.1) (P2M2.0) 00H

PCON Power control register

87h SMOD1 SMOD0

BOF

POF

GF1

GF0

PD

IDL

[2]

Bit address D7

D6

D5

D4

D3

D2

D1

D0

PSW* Program status word

D0h

CY

AC

F0

RS1

RS0

OV

F1

P

00H

PT0AD Port 0 digital input disable

F6h

00H

Bit address 9F

9E

9D

9C

9B

9A

99

98

SCON* Serial port control

98h

SM0

SM1

SM2

REN

TB8

RB8

TI

RI 00H

SBUF Serial port data buffer register

99h

xxh

SADDR Serial port address register

A9h

00H

SADEN Serial port address enable

B9h

00H

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