Hitachi 7K250 Specifications - Page 70
Initiating Write DMA
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UPC - 000004558972
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7.8.5 Initiating Write DMA DMARQ tUI DMACKSTOP tENV tACK tLI tZIORDY DDMARDY- tACK tUI t2CYC tCYC tCYC HSTROBE DD(15:0) xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx tDH tDS WT Data xxx WT Data xxx WT Data Host drives DD PARAMETER DESCRIPTION (all values in ns) tUI tACK tENV tZIORDY Unlimited interlock time Setup time for DMACKEnvelope time Minimum time before driving IORDY tLI tCYC t2CYC Limited interlock time Cycle time Two cycle time tDS Data setup time at device tDH Data Hold time at device MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX 0-0-0-0-0-0- 20 - 20 - 20 - 20 - 20 - 20 - 20 70 20 70 20 70 20 55 20 55 20 55 0-0-0-0-0-0- 0 150 0 150 0 150 0 100 0 100 0 75 112 - 73 - 54 - 39 - 25 - 16.8 - 230 - 154 - 115 - 86 - 57 - 38 - 15 - 10 - 7 - 7 - 5 - 4 - 5 - 5 - 5 - 5 - 5 - 4.6 - Figure 13 : Ultra DMA cycle timing (Initiating Write) Deskstar 7K250 Hard Disk Drive Specification 56
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