Appendix A. Library Specifications

Pin

Signal

Pin

Signal

 

 

 

 

25

SR/+RST

59

-RST/-RST

 

 

 

 

26

SR/+MSG

60

-MSG/-MSG

 

 

 

 

27

SR/+SEL

61

-SEL/-SEL

 

 

 

 

28

SR/+C/D

62

-C/D/-C/D

 

 

 

 

29

SR/+REQ

63

-REQ/-REQ

 

 

 

 

30

SR/+I/O

64

-I/O/-I/O

 

 

 

 

31

SR/+DB8

65

-DB8/-DB8

 

 

 

 

32

SR/+DB9

66

-DB9/-DB9

 

 

 

 

33

SR/+DB10

67

-DB10/-DB10

 

 

 

 

34

SR/+DB11

68

-DB11/-DB11

 

 

 

 

We recommend using active SCSI terminators on fast single-ended SCSI busses. The active terminator helps maintain a high degree of signal integrity and improves noise immunity.

A minus sign (-) next to the signal indicates an active low signal.

All passive terminators use a 220Ω pull-up resistor and 330Ω pull-down resistor for each signal. Resistor tolerances in the terminator network are ±5%, or less. Use resistors with ±1% tolerance for improved noise margins.

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Spectra Logic 10000 manual Sr/+Rst Rst/-Rst Sr/+Msg Msg/-Msg Sr/+Sel Sel/-Sel Sr/+C/D