IBM DTLA-307075 Hard Drive Specifications - Page 46
Host Terminating Read DMA, DSTROBE, HDMARDY, DMACK, DMARQ, DD15:00, Host drives DD
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7.2.4.3 Host Terminating Read DMA DMARQ DMACKSTOP HDMARDYDSTROBE DD(15:00) tLI tRP tMLI tACK tRFS tLI tACK tIORDYZ tAZ xxx RD Data xxxxxxxxxxxxxxxxxx tDS tDH xxx CRC xxxxxxxxxx tZAH Host drives DD Device drives DD Figure 30. Ultra DMA cycle timing chart (Host terminating Read) PARAMETER DESCRIPTION MODE0 MODE1 MODE2 MODE3 MODE4 MODE5 (all values in ns) MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX tRFS Ready to final strobe time - 75 - 70 - 60 - 60 - 60 - 50 tRP Ready to pause time 160 - 125 - 100 - 100 - 100 - 85 - tLI Limited interlock time 0 150 0 150 0 150 0 100 0 100 0 75 tAZ Output release time - 10 - 10 - 10 - 10 - 10 - 10 tZAH Output enable time 20 - 20 - 20 - 20 - 20 - 20 - tMLI Interlocking time 20 - 20 - 20 - 20 - 20 - 20 - tDS Data setup time (at device side) 15 - 10 - 7 - 7 - 5 - 4.0 - tDH Data hold time (at device side) 5 - 5 - 5 - 5 - 5 - 4.6 - tACK Hold time after -DMACK negation 20 - 20 - 20 - 20 - 20 - 20 - tIORDYZ Pull-up time before DSTROBE release - 20 - 20 - 20 - 20 - 20 - 20 Figure 31. Ultra DMA cycle timings (Host terminating Read) Deskstar 40GV & 75GXP hard disk drive specifications 34