Hitachi HDT725025VLA380 Specifications - Page 48
Host Terminating Read DMA
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6.9.3 Host Terminating Read DMA Table 23: Ultra DMA cycle timing chart (Host pausing Read) DMARQ DMACKSTOP tLI tRP tMLI tACK tACK HDMARDYDSTROBE DD(15:0) tRFS tLI tIORDYZ tCH tAZ tCS xxx RD Data xxxxxxxxxxxxxxxxxx xxx CRC xxxxxxxxxxx tZAH Device drives DD Host drives DD Table 24: Ultra DMA cycle timings (Host pausing Read) PARAMETER DESCRIP- MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 TION (all values in ns) MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX tRFS HDMARDY- to final DSTROBE time - 75 - 70 - 60 - 60 - 60 - 50 - 50 tRP Ready to pause time 160 - 125 - 100 - 100 - 100 - 85 - 85 - tLI Limited interlock time 0 150 0 150 0 150 0 100 0 100 0 75 0 60 tAZ Maximum time allowed for output drivers to release - 10 - 10 - 10 - 10 - 10 - 10 - 10 tZAH Minimum delay time required for output 20 - 20 - 20 - 20 - 20 - 20 - 20 - tMLI Interlock time with minimum 20 - 20 - 20 - 20 - 20 - 20 - 20 - tCS CRC word setup time at device 15 - 10 - 7 - 7 - 5 - 5 - 5 - tCH CRC word hold time at device 5-5-5-5-5-5-5- tACK Hold time for DMACK- 20 - 20 - 20 - 20 - 20 - 20 - 20 - tIO- Maximum time before RDYZ releasing IORDY - 20 - 20 - 20 - 20 - 20 - 20 - 20 Deskstar T7K500 Hard Disk Drive Specification 34