IBM DTCA-24090 Hard Drive Specifications - Page 179

13.0 Timings The timing of BSY and D R Q in Status Register are shown in Figure 108 FUNCTION Power On Software Reset Hard Reset Data In Command Data Out Command Non Data 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 START Power On Power On Device Control Register RST=1 Device Control Register RST=1 Bus RESET Signal Asserted Bus RESET Signal Asserted OUT to Command Register Status Register BSY=1 256th Read From Data Register OUT to Command Register Status Register BSY=1 256th Write From Data Register Status Register BSY=1 OUT to Command Register Status Register BSY=1 STOP Status Register BSY=1 Status Register BSY=0 and RDY=1 Status Register BSY=1 Status Register BSY=0 and RDY=1 Status Register BSY=1 Status Register BSY=0 and RDY=1 Status Register BSY=1 Status Register BSY=0 and DRQ=1, Interrupt Status Register BSY=1 Status Register BSY=1 Status Register BSY=0 and DRQ=1 Status Register BSY=1 Status Register BSY=0 and RDY=1 Interrupt Status Register BSY=1 Interrupt TIMEOUT 400 ns 31 sec 400 ns 6 sec 400 ns 31 sec 400 ns 30 sec 10 us 400 ns 700 us (Note.3) 5 us 30 sec (Note.1) 400 ns 30 sec (Note.2) Figure 108. Timeout Values © Copyright IBM Corp. 1997 171