IBM DTLA-305040 Hard Drive Specifications - Page 48
Initiating Write DMA, DSTROBE, HDMARDY, DMACK, DMARQ, tZIORDY, t2CYC, DD15:00, Host drives DD
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7.2.4.5 Initiating Write DMA DMARQ DMACKSTOP HDMARDY- tUI tACK tZIORDY tACK tENV tLI tUI t2CYC tCYC tCYC DSTROBE DD(15:00) tDS tDH xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx WT Data xxx WT Data xxx WT Data Host drives DD Figure 34. Ultra DMA cycle timing chart (Initiating Write) tUI tACK tENV tZIORDY tLI tCYC t2CYC tDS tDH PARAMETER DESCRIPTION MODE0 MODE1 MODE2 MODE3 MODE4 MODE5 (all values in ns) MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX Unlimited interlock time 0-0-0- 0-0-0- Setup time before -DMACK assertion 20 - 20 - 20 - 20 - 20 - 20 - Envelope time 20 70 20 70 20 70 20 55 20 55 20 50 Wait time before driving DSTROBE 0-0-0- 0-0-0- Limited interlock time 0 150 0 150 0 150 0 100 0 100 0 75 Cycle time 112 - 73 - 54 - 39 - 25 - 16.8 - 2 Cycle time 230 - 153 - 115 - 86 - 57 - 38 - Data setup time (at device side) 15 - 10 - 7 - 7 - 5 - 4.0 - Data hold time (at device side) 5 - 5 - 5 - 5 - 5 - 4.6 - Figure 35. Ultra DMA cycle timings (Initiating Write) Deskstar 40GV & 75GXP hard disk drive specifications 36