IBM DJSA-210 Hard Drive Specifications - Page 66
Device Terminating Read DMA, DSTROBE, HDMARDY, DMACK, DMARQ, DD15:0, Device drives DD, Host drives DD
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7.9.2 Device Terminating Read DMA DMARQ DMACKSTOP HDMARDYDSTROBE DD(15:0) tSS tLI tMLI tACK tLI tACK tLI tIORDYZ tAZ xxxxxx tZAH tDH tDS xxxxxxxxxxxxxxxxxx CRC xxxxxxxxxx Device drives DD Host drives DD 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 DMACKMaximum time before releasing IORDY MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) 50 - 50 - 50 - 50 - 50 - 0 150 0 150 0 150 0 100 0 100 - 10 - 10 - 10 - 10 - 10 20 - 20 - 20 - 20 - 20 - 20 - 20 - 20 - 20 - 20 - 15 - 10 - 7 - 7 - 5 - 5-5-5-5-5- 20 - 20 - 20 - 20 - 20 - - 20 - 20 - 20 - 20 - 20 Figure 41. Ultra DMA cycle timings (Device Terminating Read) Travelstar 32GH/30GT/20GN hard disk drive specifications 52