P87LPC778 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

P87LPC778

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

I2CON* I2C-bus control register

D8h/RD RDAT

ATN

DRDY

ARL

STR

STP MASTER

-

80h

D8h/WR CXA

IDLE

CDR

CARL

CSTR

CSTP

XSTR

XSTP

I2DAT I2C-bus data register

D9h/RD RDAT

0

0

0

0

0

0

0

80h

D9h/WR XDAT

x

x

x

x

x

x

x

Bit address AF

AE

AD

AC

AB

AA

A9

A8

IEN0* Interrupt enable 0

A8h

EA

EWD

EBO

ES

ET1

EX1

ET0

EX0 00H

Bit address EF

EE

ED

EC

EB

EA

E9

E8

IEN1* Interrupt enable 1

E8h

ETI

-

EC1

EAD

-

EC2

EKB

EI2 00H

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]

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