IBM IC25N040ATCS04 Hard Drive Specifications - Page 65
Host Terminating Read DMA, DSTROBE, HDMARDY, DMACK, DMARQ, DD15:0, Device drives DD - driver 0
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7.9.3 Host Terminating Read DMA DMARQ DMACKSTOP HDMARDYDSTROBE DD(15:0) tLI tRP tMLI tACK tACK tRFS tLI tIORDYZ tAZ xxx RD Data xxxxxxxxxxxxxxxxxx tDH tDS xxx CRC xxxxxxxxxxx tZAH Device drives DD Host drives DD tRFS tRP tLI tAZ tZAH tMLI tDS tDH tACK tIORDYZ MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 PARAMETER DESCRIPTION MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) HDMARDY- to final DSTROBE time - 75 - 70 - 60 - 60 - 60 - 50 Ready to pause time 160 - 125 - 100 - 100 - 100 - 85 - Limited interlock time 0 150 0 150 0 150 0 100 0 100 0 75 Maximum time allowed for output drivers to release - 10 - 10 - 10 - 10 - 10 - 10 Minimum delay time required for output 20 - 20 - 20 - 20 - 20 - 20 - Interlock time with minimum 20 - 20 - 20 - 20 - 20 - 20 - CRC word setup time at device 15 - 10 - 7 - 7 - 5 - 4 - CRC word hold time at device 5 - 5 - 5 - 5 - 5 - 4.6 - Hold time for DMACK- 20 - 20 - 20 - 20 - 20 - 20 - Maximum time before releasing IORDY - 20 - 20 - 20 - 20 - 20 - 20 Figure 42. Ultra DMA cycle timings (Host Terminating Read) Travelstar 60GH & 40GN hard disk drive specifications 52