Note: The + 3.3 V pins are tied together and decoupled with high frequency bypass capacitors to ground. No current from these 3.3 V pins is used on the board. The PCI portion of the LSI53C875J chip is powered from the 3 V/5 V pins.

Table 3.2 PCI Connector JI (Top)

Signal Name1

Pin

Signal Name1

Pin

Signal Name1

Pin

Signal Name1

Pin

 

 

 

 

 

 

 

 

-12 V

1

GND

17

C_BE2/

33

GND

49

 

 

 

 

 

 

 

 

TCK

2

REQ/

18

GND

34

KEYWAY

50

 

 

 

 

 

 

 

 

GND

3

3 V/5 V

19

IRDY/

35

KEYWAY

51

 

 

 

 

 

 

 

 

TDO

4

AD31

20

+3.3 V

36

AD08

52

 

 

 

 

 

 

 

 

+5 V

5

AD29

21

DEVSEL/

37

AD07

53

 

 

 

 

 

 

 

 

+5 V

6

GND

22

GND

38

+3.3 V

54

 

 

 

 

 

 

 

 

INTB/

7

AD27

23

LOCK/

39

AD05

55

 

 

 

 

 

 

 

 

INTD/

8

AD25

24

PERR/

40

AD03

56

 

 

 

 

 

 

 

 

GND (PRSNT1/)

9

+3.3 V

25

+3.3 V

41

GND

57

 

 

 

 

 

 

 

 

RESERVED

10

C_BE3/

26

SERR/

42

AD01

58

 

 

 

 

 

 

 

 

GND (PRSNT2/)

11

AD23

27

+3.3 V

43

3 V/5 V

59

 

 

 

 

 

 

 

 

KEYWAY

12

GND

28

C_BE1/

44

ACK64/

60

 

 

 

 

 

 

 

 

KEYWAY

13

AD21

29

AD14

45

+5 V

61

 

 

 

 

 

 

 

 

RESERVED

14

AD19

30

GND

46

+5 V

62

 

 

 

 

 

 

 

 

GND

15

+3.3 V

31

AD12

47

 

 

 

 

 

 

 

 

 

 

CLK

16

AD17

32

AD10

48

 

 

 

 

 

 

 

 

 

 

1. Shaded signals are not connected.

3-4

Technical Specifications