Hitachi 7K250 Specifications - Page 63
PIO timings
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UPC - 000004558972
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7.6 PIO timings The PIO cycle timings meet Mode 4 of the ATA/ATAPI-6 description. CS(1:0)DA(2:0) DIOR-, DIOW W rite data DD(15:0) Read data DD(15:0) IOCS16-(*) IORDY t9 t1 t0 t2 t2i t3 t4 t7(*) tA t5 t6 t6z t8(*) tRD tB (*) Up to ATA-2 (mode-0,1,2) PARAMETER DESCRIPTION t0 Cycle time t1 Address valid to DIOR-/DIOW- setup t2 DIOR-/DIOW- pulse width t2i DIOR-/DIOW- recovery time t3 DIOW- data setup t4 DIOW- data hold t5 DIOR- data setup t6 DIOR- data hold t9 DIOR-/DIOW- to address valid hold tA IORDY setup width tB IORDY pulse width MIN (ns) 120 25 70 25 20 10 20 5 10 - - MAX (ns 35 1250 Figure 2: PIO cycle timings 7.6.1 Write DRQ interval time For write sectors and write multiple operations 3.8 ms is inserted from the end of negation of the DRQ bit until setting of the next DRQ bit. Deskstar 7K250 Hard Disk Drive Specification 49
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