Hitachi HDS725050KLA360 Specifications - Page 251
Time-out values
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13.0 Time-out values The timing of BSY and DRQ in Status Register are shown in the table below. Table 175: Time-out values INTERVAL START STOP Power On Device Busy After Power Power On On Device Ready After Power On Power On Software Reset Device Busy After Soft- Device Control Register ware Reset RST=1 Device Ready After Soft- Device Control Register ware Reset RST=0 After RST=1 Hard Reset Device Busy After Hard Bus RESET Signal Reset Asserted Device Ready After Hard Bus RESET Signal Reset Asserted Data In Com- Device Busy After Com- OUT To Command Reg- mand mand Code Out ister Interrupt, DRQ For Data Status Register BSY=1 Transfer In Device Busy After Data 256th Read From Data Transfer In Register Data Out Com- Device Busy After Com- OUT to Command Reg- mand mand Code Out ister Device Busy After Data 256th Write From Data Transfer Out Register Interrupt For Data Trans- Status Register BSY=1 fer Out Non-Data Command Device Busy After Com- OUT to Command Reg- mand Code Out ister Interrupt For Command Status Register BSY=1 Complete DMA Data Device Busy After Com- OUT to Command Reg- Transfer Com- mand Code Out ister mand Status Register BSY=1 Status Register BSY=1 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=1 Status Register BSY=0 and RDY=1 Interrupt Status Register BSY=1 Interrupt 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 400 ns 30 sec 400 ns Command category is referred to in section 11.0, "Command protocol" on page 101. The abbreviations "ns", "µs", "ms," and "sec" mean nanoseconds, microseconds, milliseconds, and seconds, respectively. If the host detects a time-out while waiting for a response from the device, we recommend that the host system execute a Soft reset and then retry the command. . Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification 237
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