IBM IC25N040ATCS04 Hard Drive Specifications - Page 208

14.0 Time-out values The timing of BSY and DRQ in Status Register are shown in the table below. Power On Software Reset Hard Reset Data In Command Data Out Command Non-Data Command DMA Data Transfer Command INTERVAL Device Busy After Power On Device Ready After Power On Device Busy After Software Reset Device Ready After Software Reset Device Busy After Hard Reset Device Ready After Hard Reset Device Busy After Command Code Out Interrupt, DRQ For Data Transfer In Device Busy After Data Transfer In Device Busy After Command Code Out Data Request For Data Transfer Out Device Busy After Data Transfer Out Interrupt For Data Transfer Out Device Busy After Command Code Out Interrupt For Command Complete Device Busy After Command Code Out START STOP Power On Power On Status Register BSY=1 Status Register BSY=1 and RDY=1 Device Control Register RST=1 Status Register BSY=1 Device Control Register RST=0 After RST=1 Status Register BSY=0 and RDY=1 Bus RESET Signal Status Register Asserted BSY=1 Bus RESET Signal Status Register Asserted BSY=0 and RDY=1 OUT To Command Register Status Register BSY=1 256th Read From Data Register Status Register BSY=1 Status Register BSY=0 and DRQ=1, Interrupt Status Register BSY=1 OUT to Command Register Status Register BSY=1 Status Register Status Register BSY=1 BSY=0 and DRQ=1 256th Write From Status Register Data Register BSY=1 Status Register BSY=1 Status Register BSY=0 and RDY=1 Interrupt OUT to Command Register Status Register BSY=1 Status Register Interrupt BSY=1 OUT to Command Register Status Register BSY=1 Figure 141. Time-out values Travelstar 60GH & 40GN hard disk drive specifications 195 TIME-OUT 400 ns 31 sec 400 ns 31 sec 400 ns 31 sec 400 ns 30 sec 10 µs 400 ns 700 µs (Note 3) 5 µs 30 sec (Note 1) 400 ns 30 sec (Note 2) 400 ns