AT89S8253_08 datasheet(3/59 Pages) ATMEL

Part #	AT89S8253

Description	8-bit Microcontroller with 12K Bytes Flash and 2K Bytes EEPROM

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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3

3286L–MICRO–8/08

AT89S8253

2.3

44J – 44-lead PLCC

2.4

42PS6 – PDIP

3.

Pin Description

3.1

VCC

Supply voltage (all packages except 42-PDIP).

3.2

GND

Ground (all packages except 42-PDIP; for 42-PDIP GND connects only the logic core and the

embedded program/data memories).

3.3

VDD

Supply voltage for the 42-PDIP which connects only the logic core and the embedded pro-

gram/data memories.

3.4

PWRVDD

Supply voltage for the 42-PDIP which connects only the I/O Pad Drivers.

The application board must connect both VDD and PWRVDD to the board supply voltage.

7

8

9

10

11

12

13

14

15

16

17

39

38

37

36

35

34

33

32

31

30

29

(MOSI) P1.5

(MISO) P1.6

(SCK) P1.7

RST

(RXD) P3.0

NC

(TXD) P3.1

(INT0) P3.2

(INT1) P3.3

(T0) P3.4

(T1) P3.5

P0.4 (AD4)

P0.5 (AD5)

P0.6 (AD6)

P0.7 (AD7)

EA/VPP

NC

ALE/PROG

PSEN

P2.7 (A15)

P2.6 (A14)

P2.5 (A13)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

RST

(RXD) P3.0

(TXD) P3.1

(INT0) P3.2

(INT1) P3.3

(T0) P3.4

(T1) P3.5

(WR) P3.6

(RD) P3.7

XTAL2

XTAL1

GND

PWRGND

(A8) P2.0

(A9) P2.1

(A10) P2.2

(A11) P2.3

(A12) P2.4

(A13) P2.5

(A14) P2.6

(A15) P2.7

P1.7 (SCK)

P1.6 (MISO)

P1.5 (MOSI)

P1.4 (SS)

P1.3

P1.2

P1.1 (T2EX)

P1.0 (T2)

VDD

PWRVDD

P0.0 (AD0)

P0.1 (AD1)

P0.2 (AD2)

P0.3 (AD3)

P0.4 (AD4)

P0.5 (AD5)

P0.6 (AD6)

P0.7 (AD7)

EA/VPP

ALE/PROG

PSEN

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AT89S8253 Datasheet(PDF) 3 Page - ATMEL Corporation

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