Hitachi 7K100 Hard Drive Specifications - Page 60
Device Terminating Read DMA
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7.9.4 Device Terminating Read DMA DMARQ DMACKSTOP HDMARDYDSTROBE DD(15:0) tSS tLI tMLI tACK tLI tACK tLI tIORDYZ tAZ xxxxx tZAH tDH tDS xxxxxxxxxxxxxxxxxx CRC xxxxxxxxxx Device drives DD Host drives DD Table 32: Ultra DMA cycle timings (Device Terminating Read) tSS tLI tAZ tZAH tMLI tDS tDH tACK tIORDYZ PARAMETER DESCRIPTION Time from DSTROBE edge to negation of DMARQ Limited interlock time Maximum time allowed for output drivers to release Maximum delay time required for output Interlock time with minimum CRC word setup time at device CRC word hold time at device Hold time for DMACKnegation Maximum time before releasing IORDY MODE 0 MIN MAX (ns) (ns) 50 - 0 150 - 10 20 - 20 - 15 - 5 - 20 - - 20 MODE 1 MIN MAX (ns) (ns) 50 - 0 150 - 10 20 - 20 - 10 - 5 - 20 - - 20 MODE 2 MIN MAX (ns) (ns) 50 - 0 150 - 10 20 - 20 - 7 - 5 - 20 - - 20 MODE 3 MIN MAX (ns) (ns) 50 - 0 100 - 10 20 - 20 - 7 - 5 - 20 - - 20 MODE 4 MIN MAX (ns) (ns) 50 - 0 100 - 10 20 - 20 - 5 - 5 - 20 - - 20 MODE 5 MIN MAX (ns) (ns) 50 - 0 75 - 10 20 - 20 - 4 - 4.6 - - - - 20 Travelstar 7K100 Hard Disk Drive Specification 46