Hitachi 7K250 Specifications - Page 69
Device Terminating Read DMA
UPC - 000004558972
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7.8.4 Device Terminating Read DMA DMARQ DMACKSTOP HDMARDY- tSS tLI tLI DSTROBE DD(15:0) tAZ xxxxxx tZAH Device drives DD tMLI tACK tACK tLI tIORDYZ tCH tCS xxxxxxxxxxxxxxxxxx CRC xxxxxxxxxx Host drives DD tSS tLI tAZ tZAH tMLI tCS tCH tACK tIORDYZ PARAMETER DESCRIPTION (all values in ns) 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 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 50 - 50 - 50 - 50 - 50 - 50 - 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 12 : Ultra DMA cycle timings (Device Terminating Read) Deskstar 7K250 Hard Disk Drive Specification 55