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MULTI 8255/8253 CARD

DECISION COMPUTER INTERNATIONAL CO., LTD.

MULTI 8255/8253 CARD

Card Type

Data acquisition

Chip Set

NEC 8253, 8255

I/O Options

Digital I/O ports (4), counter port

Data Bus

8-bit ISA

CONNECTIONS

Function

Label

Function

Label

Digital I/O port 1 (see pinout below)

CN1

8255 chip for port 4 (channel 7)

U3

Digital I/O port 2 (see pinout below)

CN2

8255 chip for port 4 (channel 8)

U4

Digital I/O port 3 (see pinout below)

CN3

8255 chip for port 1 (channel 1)

U6

Digital I/O port 4 (see pinout below)

CN4

8255 chip for port 1 (channel 2)

U7

8253 counter port (see pinout below)

CN5

8255 chip for port 2 (channel 3)

U8

8255 chip for port 3 (channel 5)

U1

8255 chip for port 2 (channel 4)

U9

8255 chip for port 3 (channel 6)

U2

   

CN1-CN4 PINOUT

Function

Pin

Function

Pin

Channel 1A bit 0

1

Channel 1C bit 2

19

Channel 1A bit 1

2

Channel 1C bit 3

20

Channel 1A bit 2

3

Channel 1C bit 4

21

Channel 1A bit 3

4

Channel 1C bit 5

22

Channel 1A bit 4

5

Channel 1C bit 6

23

Channel 1A bit 5

6

Channel 1C bit 7

24

Channel 1A bit 6

7

Ground

25

Channel 1A bit 7

8

Ground

26

Channel 1B bit 0

9

Channel 2A bit 0

27

Channel 1B bit 1

10

Channel 2A bit 1

28

Channel 1B bit 2

11

Channel 2A bit 2

29

Channel 1B bit 3

12

Channel 2A bit 3

30

Channel 1B bit 4

13

Channel 2A bit 4

31

Channel 1B bit 5

14

Channel 2A bit 5

32

Channel 1B bit 6

15

Channel 2A bit 6

33

Channel 1B bit 7

16

Channel 2A bit 7

34

Channel 1C bit 0

17

Channel 2B bit 0

35

Channel 1C bit 1

18

Channel 2B bit 1

36

CN1-CN4 PINOUT (CONT)

Function

Pin

Function

Pin

Channel 2B bit 2

37

Channel 2C bit 1

44

Channel 2B bit 3

38

Channel 2C bit 2

45

Channel 2B bit 4

39

Channel 2C bit 3

46

Channel 2B bit 5

40

Channel 2C bit 4

47

Channel 2B bit 6

41

Channel 2C bit 5

48

Channel 2B bit 7

42

Channel 2C bit 6

49

Channel 2C bit 0

43

Channel 2C bit 7

50

Note:CN2 through CN4 are wired identically to CN1. CN1 has the signals for channels 1 and 2. CN2 through CN4 have the signals for channels 3 through 8, respectively.

CN5 PINOUT

Function

Pin

Function

Pin

Ground

1

Counter 2B clock signal in

18

Counter 1A clock signal in

2

Gate 2B signal

19

Gate 1A signal

3

Counter 2B clock signal out

20

Counter 1A clock signal out

4

Ground

21

Ground

5

Counter 2C clock signal in

22

Counter 1B clock signal in

6

Gate 2C signal

23

Gate 1B signal

7

Counter 2C clock signal out

24

Counter 1B clock signal out

8

Ground

25

Ground

9

+5V DC power

26

Counter 1C clock signal in

10

Ground

27

Gate 1C signal

11

-5V DC power

28

Counter 1C clock signal out

12

Ground

29

Ground

13

+12V DC power

30

Counter 2A clock signal in

14

Ground

31

Gate 2A signal

15

-12V DC power

32

Counter 2A clock signal out

16

Ground

33

Ground

17

Ground

34

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Counter 1A uses internal clock source

JP1/A

Closed

 

Counter 1A uses external clock source

JP1/A

Open

Counter 1B uses internal clock source

JP1/B

Closed

 

Counter 1B uses external clock source

JP1/B

Open

Counter 1C uses internal clock source

JP1/C

Closed

 

Counter 1C uses external clock source

JP1/C

Open

Counter 2A uses internal clock source

JP2/A

Closed

 

Counter 2A uses external clock source

JP2/A

Open

Counter 2B uses internal clock source

JP2/B

Closed

 

Counter 2B uses external clock source

JP2/B

Open

Counter 2C uses internal clock source

JP2/C

Closed

 

Counter 2C uses external clock source

JP2/C

Open

Base I/O address set to 140h

JP3

Closed

 

Base I/O address set to 100h

JP3

Open