Hitachi 7K250 Specifications - Page 68
Host Terminating Read DMA
UPC - 000004558972
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7.8.3 Host Terminating Read DMA DMARQ DMACKSTOP HDMARDYDSTROBE DD(15:0) tLI tRP tMLI tACK tACK tRFS tLI tIORDYZ tAZ xxx RD Data xxxxxxxxxxxxxxxxxx tCH tCS xxx CRC xxxxxxxxxxx tZAH Device drives DD Host drives DD tRFS tRP tLI tAZ tZAH tMLI tCS tCH tACK tIORDYZ PARAMETER DESCRIPTION (all values in ns) HDMARDY- to final DSTROBE time Ready to pause time Limited interlock time Maximum time allowed for output drivers to release Minimum delay time required for output Interlock time with minimum CRC word setup time at device CRC word hold time at device Hold time for DMACKMaximum time before releasing IORDY MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX - 75 - 70 - 60 - 60 - 60 - 50 160 - 125 - 100 - 100 - 100 - 85 - 0 150 0 150 0 150 0 100 0 100 0 75 - 10 - 10 - 10 - 10 - 10 - 10 20 - 20 - 20 - 20 - 20 - 20 - 20 - 20 - 20 - 20 - 20 - 20 - 15 - 10 - 7 - 7 - 5 - 5 - 5-5-5-5-5-5- 20 - 20 - 20 - 20 - 20 - 20 - - 20 - 20 - 20 - 20 - 20 - 20 Figure 6: Ultra DMA cycle timings (Host Terminating Read) Deskstar 7K250 Hard Disk Drive Specification 54