Hitachi 7K100 Hard Drive Specifications - Page 213
Time-out values
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14.0 Time-out values The timing of BSY and DRQ in Status Register are shown in the table below. Table 137: Time-out values INTERVAL START STOP Power On Device Busy After Power On Power On Status Register BSY=1 Device Ready After Power On Power On Status Register BSY=0 and RDY=1 Software Reset Device Busy After Soft- Device Control Regis- ware Reset ter RST=1 Status Register BSY=1 Device Ready After Software Reset Device Control Regis- Status Register BSY=0 ter RST=0 After RST=1 and RDY=1 Hard Reset Device Busy After Hard Bus RESET Signal Reset Asserted Status Register BSY=1 Device Ready After Hard Reset Bus RESET Signal Asserted Status Register BSY=0 and RDY=1 Data In Command Device Busy After Com- OUT To Command mand Code Out Register Status Register BSY=1 Interrupt, DRQ For Data Status Register BSY=1 Status Register BSY=0 Transfer In and DRQ=1 Interrupt Device Busy After Data 256th Read From Data Status Register BSY=1 Transfer In Register Data Out Com- Device Busy After Com- OUT to Command Reg- Status Register BSY=1 mand mand Code Out ister Device Busy After Data 256th Write From Data Status Register BSY=1 Transfer Out Register Interrupt For Data Transfer Out Status Register BSY=1 Status Register BSY=0 and RDY=1 Interrupt Non-Data Command Device Busy After Com- OUT to Command Reg- Status Register BSY=1 mand Code Out ister Interrupt For Command Status Register BSY=1 Interrupt Complete DMA Data Transfer Command Device Busy After Com- OUT to Command Reg- mand Code Out ister Status Register BSY=1 TIME-OUT 400 ns 31 sec 400 ns 31 sec 400 ns 31 sec 400 ns 30 sec 10 µs 400 ns 5 µs 30 sec (Note 1) 400 ns 30 sec (Note 2) 400 ns The abbreviations "ns", "µs", "ms" and "sec" mean nanoseconds, microseconds, milliseconds, and seconds, respectively. We recommend that the host system execute Soft reset and then retry to issue the command if the host system time-out would occur for the device. Travelstar 7K100 Hard Disk Drive Specification 197