Table 3.3 PCI Connector JI (Bottom)

Signal Name1

Pin

Signal Name1

Pin

Signal Name1

Pin

Signal Name1

Pin

 

 

 

 

 

 

 

 

TRST/

1

GNT/

17

+3.3 V

33

AD09

49

 

 

 

 

 

 

 

 

+12V

2

GND

18

FRAME/

34

KEYWAY

50

 

 

 

 

 

 

 

 

TMS

3

RESERVED

19

GND

35

KEYWAY

51

 

 

 

 

 

 

 

 

TDI

4

AD30

20

TRDY/

36

C_BE0/

52

 

 

 

 

 

 

 

 

+5 V

5

+3.3 V

21

GND

37

+3.3V

53

 

 

 

 

 

 

 

 

INTA/

6

AD28

22

STOP/

38

AD06

54

 

 

 

 

 

 

 

 

INTC/

7

AD26

23

+3.3 V

39

AD04

55

 

 

 

 

 

 

 

 

+5 V

8

GND

24

SDONE

40

GND

56

 

 

 

 

 

 

 

 

RESERVED

9

AD24

25

SBO/

41

AD02

57

 

 

 

 

 

 

 

 

3 V/5 V

10

IDSEL

26

GND

42

AD00

58

 

 

 

 

 

 

 

 

RESERVED

11

+3.3 V

27

PAR

43

3 V/5 V

59

 

 

 

 

 

 

 

 

KEYWAY

12

AD22

28

AD15

44

REQ64/

60

 

 

 

 

 

 

 

 

KEYWAY

13

AD20

29

+3.3 V

45

+5 V

61

 

 

 

 

 

 

 

 

RESERVED

14

GND

30

AD13

46

+5 V

62

 

 

 

 

 

 

 

 

RST/

15

AD18

31

AD11

47

 

 

 

 

 

 

 

 

 

 

3 V/5 V

16

AD16

32

GND

48

 

 

 

 

 

 

 

 

 

 

1. Shaded signals are not connected.

3.2.2 The SCSI Interface

The SCSI interface operates as 16-bit, synchronous or asynchronous, High Voltage Differential (HVD) bus, and supports SCSI-3 protocols and 16-bit arbitration. The signal definitions conform to the SCSI-2 differential standard. The interface is made through connectors J2 and J3. Connector J2 is a 68-pin, high density, right-angle receptacle used for internal connections. Connector J3 is a 68-pin, high density, right-angle receptacle that protrudes through the back panel bracket. SCSI termination is provided through a HVD plug-in terminator. SCSI termination power is also supplied by the board. Table Table 1.4 shows the signal assignments for J2 and J3 SCSI HVD connectors.

Operational Environment

3-5