IBM IC25N040ATCS04 Hard Drive Specifications - Page 63
Ultra DMA timings, 9.1 Initiating Read DMA - 0 drivers
View all IBM IC25N040ATCS04 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 63 highlights
7.9 Ultra DMA timings The Ultra DMA timings meet Mode 0, 1, 2, 3, 4, and 5 of the Ultra DMA Protocol. 7.9.1 Initiating Read DMA DMARQ DMACKSTOP HDMARDY- tUI tACK tENV tACK tENV tZIORDY DSTROBE tAZ DD(15:0) xxxxxxxxxxxxxxxxxxxxxxxxx Host drives DD t2CYC tFS tCYC tCYC tAZD tDS tDH xxx RD Data xxx RD Data xxx RD Data Device drives DD tUI tACK tENV tZIORDY tFS tCYC t2CYC tAZ tZAD tDS tDH MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 PARAMETER DESCRIPTION MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) (ns) Unlimited interlock time 0 - 0 - 0 - 0 - 0 - 0 - Setup time for DMACK- 20 - 20 - 20 - 20 - 20 - 20 - Envelope time Minimum time before driving IORDY 20 70 20 70 20 70 20 55 20 55 20 50 0-0-0-0-0-0 - First DSTROBE time Cycle time Two cycle time 0 230 0 200 0 170 0 130 0 120 - 90 112 - 73 - 54 - 39 - 25 - 16.8 - 230 - 154 - 115 - 86 - 57 - 38 - Maximum time allowed for output drivers to release - 10 - 10 - 10 - 10 - 10 10 Drivers to assert Data setup time at host Data hold time at host 0-0-0-0-0-0 - 15 - 10 - 7 - 7 - 5 - 4.8 - 5 - 5 - 5 - 5 - 5 - 4.8 - Figure 40. Ultra DMA cycle timings (Initiating Read) Travelstar 60GH & 40GN hard disk drive specifications 50