Black Box SC122A, Manual

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CHAPTER 6: SCSI Technical Information
• DB(0 through 15,P,P1) (DATA BUS) : Eight data-bit signals, plus a parity-bit
signal that form a data bus. DB(7) is the most significant bit and has the
highest priority during the Arbitration phase. Bit number, significance, and
priority decrease downward to DB(0). A data bit is defined as one when the
signal value is true and is defined as zero when the signal value is false. Data
parity DB(P) shall be odd.
Table 6-1. SCSI connector assignments single-ended (SE)
16-bit SCSI (wide)
Signal Name Pin Number Signal Name Pin Number
Ground 1 -DB12 35
Ground 2 -DB13 36
Ground 3 -DB14 37
Ground 4 -DB15 38
Ground 5 -DBP1 39
Ground 6 -DB0 40
Ground 7 -DB1 41
Ground 8 -DB2 42
Ground 9 -DB3 43
Ground 10 -DB4 44
Ground 11 -DB5 45
Ground 12 -DB6 46
Ground 13 -DB7 47
Ground 14 -DBP 48