IBM DTLA-305040 Hard Drive Specifications - Page 47
Device Terminating Read DMA, DSTROBE, HDMARDY, DMACK, DMARQ, DD15:00, Host drives DD
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7.2.4.4 Device Terminating Read DMA DMARQ DMACKSTOP HDMARDYDSTROBE DD(15:00) tSS tMLI tLI tACK tLI tLI tACK tIORDYZ tAZ xxxxx Tzah tDS tDH xxxxxxxxxxxxxxxxxx CRC xxxxxxxxxx Host drives DD Device drives DD Figure 32. Ultra DMA cycle timing chart (Device terminating Read) tSS tLI tAZ tZAH tMLI tDS tDH tACK tIORDYZ PARAMETER DESCRIPTION MODE0 MODE1 MODE2 MODE3 MODE4 MODE5 (all values in ns) MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX Time from strobe to stop assertion 50 - 50 - 50 - 50 - 50 - 50 - Limited interlock time 0 150 0 150 0 150 0 100 0 100 0 75 Output release time - 10 - 10 - 10 - 10 - 10 - 10 Output enable time 20 - 20 - 20 - 20 - 20 - 20 - Interlocking time 20 - 20 - 20 - 20 - 20 - 20 - Data setup time (at device side) 15 - 10 - 7 - 7 - 5 - 4.0 - Data hold time (at device side) 5 - 5 - 5 - 5 - 5 - 4.6 - Hold time after -DMACK negation 20 - 20 - 20 - 20 - 20 - 20 - Pull-up time before DSTROBE release - 20 - 20 - 20 - 20 - 20 - 20 Figure 33. Ultra DMA cycle timings (Device Terminating Read) Deskstar 40GV & 75GXP hard disk drive specifications 35
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