IBM IC35L040AVVN07-0 Hard Drive Specifications - Page 207
Timings
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12.0 Timings The timing of BSY and DRQ in Status Register is shown in the figure below. Function Power On Software Reset Hard Reset Data In Command Data Out Command Non-Data Command DMA Data Transfer Command Interval Start Device Busy After Power On Power On Device Ready After Power On Power On Device Busy After Device Control Software Reset Register RST=1 Device Ready Device Control After Software Register RST=0 Reset After RST=1 Device Busy After Bus RESET Signal Hard Reset Asserted Device Ready Bus RESET Signal After Hard Reset Asserted Device Busy After OUT To Command Command Code Out Register Interrupt, DRQ For Data Transfer In Status BSY=1 Register Device Busy After 256th Read From Data Transfer In Data Register Device Busy After OUT to Command Command Code Out Register Device Busy After 256th Write From Data Transfer Out Data Register Interrupt For Status Register Data Transfer Out BSY=1 Device Busy After OUT to Command Command Code Out Register Interrupt For Status Register Command Complete BSY=1 Device Busy After OUT to Command Command Code Out Register Stop 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 & 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 us 400 ns 5 us 30 sec 400 ns 30 sec 400 ns Figure 160. Time-out values Command category is referred to in Section 10.0 , "Command Protocol" on page 95. The abbreviations "ns", "us", "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 120GXP hard disk drive specifications 193