Hitachi 7K250 Specifications - Page 72
Device Terminating Write DMA
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UPC - 000004558972
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7.8.7 Device Terminating Write DMA DMARQ DMACKSTOP DDMARDYHSTROBE DD(15:0) tRP tLI tMLI tACK tIORDYZ tRFS tLI tACK tCH tCS xxx WT Data xxxxxxxxxxxxxxxxxxxxxxxxxx CRC xxxxxxxxxx Host drives DD tRFS tRP tLI tMLI tCS tCH tACK tIORDYZ PARAMETER DESCRIPTION (all values in ns) DDMARDY- to final HSTROBE time Ready to pause time Limited interlock time Interlocking time with minimum CRC word setup time at device CRC word hold time at device Hold time for DMACK-negation Maximum 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 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 8: Ultra DMA cycle timings (Device TerminatingWrite) Deskstar 7K250 Hard Disk Drive Specification 58
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