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DP8496 Datasheet(PDF) 81 Page - National Semiconductor (TI) |
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DP8496 Datasheet(HTML) 81 Page - National Semiconductor (TI) |
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81 / 92 page  70 AC Specifications (Continued) 721 SCSI SELECTION AS TARGET TLF11212 – 55 ID Symbol Parameter Optimal BCLK Worst Case Units Min Max Min Max 211 bihbol BSY In Deasserted to BSY Out Asserted (Note 1) 400 800 400 1300 ns 212 blsh BSY Out Asserted to SEL In Hold 0 0 ns 213 blih BSY In Asserted to SCSI ID Hold 0 0 ns 214 shiov SEL In Deasserted to IO CD MSG Asserted 100 100 ns Note 1 This time starts when BSY is deasserted AND SEL is asserted AND IO is asserted AND the logical OR of SCSI ID is valid All SCSI signals are active-high on the DP8497 722 SCSI RESELECTION AS TARGET TLF11212 – 56 ID Symbol Parameter Optimal BCLK Worst Case Units Min Max Min Max 221 bobv BSY Out Deasserted to BSY In Valid (Note 1) 400 400 ns 222 blsu BSY In Asserted to SEL Out Deasserted 90 90 ns 223 sliv SEL Out Asserted to SCSI ID Out Valid 12 14 12 21 m s 224 ivbo SCSI ID Out Valid to BSY Out Deasserted 90 230 90 350 ns 225 shdz SEL Out Deasserted to SCSI Data Deasserted b 30 30 b 30 30 ns 226 sliol SEL Out Asserted to IO Asserted 12 14 12 21 m s 227 blidi BSY in Asserted to SCSI ID Out In Valid 90 90 ns Note 1 BSY may be asserted sooner but it will not be detected until (bobv) time has passed All SCSI signals are active-high on the DP8497 81 |
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