Hitachi 7K250 Specifications - Page 73
Host Terminating Write DMA
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7.8.8 Host Terminating Write DMA DMARQ DMACKSTOP DDMARDYHSTROBE DD(15:0) tLI tSS tLI tMLI tIORDYZ tACK tLI tACK tCH tCS xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx CRC xxxxxxxxxx Host drives DD tSS tLI tMLI tCS tCH tACK tIORDYZ PARAMETER DESCRIPTION (all values in ns) Time from HSTROBE edge to assertion of STOP Limited interlock time Interlock time with minimum CRC word setup time at device CRC word hold time at device Hold time for DMACK- Maximum time before releasing IORDY MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX 50 - 50 - 50 - 50 - 50 - 50 - 0 150 0 150 0 150 0 100 0 100 0 75 20 - 20 - 20 - 20 - 20 - 20 - 15 - 10 - 7 - 7 - 5 - 5 - 5-5-5-5-5-5- 20 - 20 - 20 - 20 - 20 - 20 - - 20 - 20 - 20 - 20 - 20 - 20 Figure 9: Ultra DMA cycle timings (Host Terminating Write) Deskstar 7K250 Hard Disk Drive Specification 59
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