Hitachi HDS728080PLAT20 Specifications - Page 49
Device Terminating Read DMA
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6.8.4 Device Terminating Read DMA Table 30: Ultra DMA cycle timing chart (Host pausing Read) 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 Table 31: Ultra DMA cycle timings (Device Terminating Read) PARAMETER DESCRIP- MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 TION MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX (all values in ns) tSS Time from DSTROBE edge 50 - 50 - 50 - 50 - 50 - 50 - 50 - to negation of DMARQ tLI Limited interlock time 0 150 0 150 0 150 0 100 0 100 0 75 0 60 tAZ Maximum time allowed for - 10 - 10 - 10 - 10 - 10 - 10 - 10 output drivers to release tZAH Maximum delay time 20 - 20 - 20 - 20 - 20 - 20 - 20 - required for output tMLI Interlock time with minimum 20 - 20 - 20 - 20 - 20 - 20 - 20 - tCS CRC word setup time at 15 - 10 - 7 - 7 - 5 - 5 - 5 - device tCH CRC word hold time at 5-5-5-5-5-5-5- device tACK Hold time for DMACK- 20 - 20 - 20 - 20 - 20 - 20 - 20 - tIORDYZ Maximum time before - 20 - 20 - 20 - 20 - 20 - 20 - 20 releasing IORDY Deskstar 7K80 Hard Disk Drive Specification 45