IBM IC35L020 Hard Drive Specifications - Page 50
Initiating Write DMA, DSTROBE, HDMARDY, DMACK, DMARQ, tZIORDY, t2CYC, DD00-DD15, Host drives DD
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9.1.7.5 Initiating Write DMA DMARQ DMACKSTOP HDMARDY- tUI tACK tZIORDY tACK tENV tLI tUI t2CYC tCYC tCYC DSTROBE tDS tDH DD00-DD15 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx WT Data xxx WT Data xxx WT Data Host drives DD Signal names tUI tACK tENV tZIORDY tLI tCYC t2CYC tDS tDH MODE0 MODE1 MODE2 MODE3 MODE4 MODE5 Parameter descriptions 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 - 17 - 2 Cycle time 230 - 153 - 115 - 86 - 57 - 38 - Data setup time (at device side) 15 - 10 - 7 - 7 - 5 - 4 - Data hold time (at device side) 5 - 5 - 5 - 5 - 5 - 5 - (all values are in ns) Figure 31. Ultra DMA cycle timings-Initiating Write Deskstar 60 GXP Hard disk drive specification 36