AT89C51AC3-S3SUM datasheet(11/143 Pages) ATMEL

Part #	AT89C51AC3-S3SUM

Description	Enhanced 8-bit Microcontroller with 64KB Flash Memory

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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11

AT89C51AC3

4383B–8051–01/05

SFR Mapping

The Special Function Registers (SFRs) of the AT89C51AC3 fall into the following

categories:

Mnemonic

Add Name

765

432

10

ACC

E0h Accumulator

–––

––

B

F0h B Register

–––

––

PSW

D0h Program Status Word

CY

AC

F0

RS1

RS0

OV

F1

P

SP

81h Stack Pointer

–––

––

DPL

82h

Data Pointer Low

byte

LSB of DPTR

–––

––

DPH

83h

Data Pointer High

byte

MSB of DPTR

–––

––

Mnemonic

Add Name

765

432

10

P0

80h Port 0

–––

––

P1

90h Port 1

–––

––

P2

A0h Port 2

–––

––

P3

B0h Port 3

–––

––

P4

C0h Port 4 (x5)

–

P4.4 /

MOSI

P4.3 /

SCK

P4.2 /

MISO

P4.1

P4.0

Mnemonic

Add Name

765

432

10

TH0

8Ch

Timer/Counter 0 High

byte

–––

––

TL0

8Ah

Timer/Counter 0 Low

byte

–––

––

TH1

8Dh

Timer/Counter 1 High

byte

–––

––

TL1

8Bh

Timer/Counter 1 Low

byte

–––

––

TH2

CDh

Timer/Counter 2 High

byte

–––

––

TL2

CCh

Timer/Counter 2 Low

byte

–––

––

TCON

88h

Timer/Counter 0 and

1 control

TF1

TR1

TF0

TR0

IE1

IT1

IE0

IT0

TMOD

89h

Timer/Counter 0 and

1 Modes

GATE1

C/T1#

M11

M01

GATE0

C/T0#

M10

M00

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AT89C51AC3-S3SUM Datasheet(PDF) 11 Page - ATMEL Corporation

AT89C51AC3-S3SUM Datasheet(HTML) 11 Page - ATMEL Corporation

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