IBM DTLA-305040 Hard Drive Specifications - Page 205

Timings, Time-out, Start, Interval, Function

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13.0 Timings The timing of BSY and DRQ in Status Register are 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 Power On After 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 Data Request For Status Register Data Transfer Out BSY=1 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=0 and DRQ=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 700 us 5 us 30 sec 400 ns 30 sec 400 ns Figure 147. Time-out values Command category is referred to in 11.0 , "Command Protocol" on page 30. The abbreviations "ns", "us", "ms," and "sec" mean nanoseconds, microseconds, milliseconds, and seconds, respectively. If the host detects a timeout while waiting for a response from the device, we recommend that the host system execute a Soft reset and then retry the command. Deskstar 40GV & 75GXP hard disk drive specifications 193

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13.0
Timings
The timing of BSY and DRQ in Status Register are shown in the figure below.
400 ns
Status Register
BSY=1
OUT to Command
Register
Device Busy After
Command Code Out
DMA Data
Transfer
Command
30 sec
Interrupt
Status Register
BSY=1
Interrupt For
Command Complete
400 ns
Status Register
BSY=1
OUT to Command
Register
Device Busy After
Command Code Out
Non-Data
Command
30 sec
Status Register
BSY=0 and RDY=1
Interrupt
Status Register
BSY=1
Interrupt For
Data Transfer Out
5 us
Status Register
BSY=1
256th Write From
Data Register
Device Busy After
Data Transfer Out
700 us
Status Register
BSY=0 and DRQ=1
Status Register
BSY=1
Data Request For
Data Transfer Out
400 ns
Status Register
BSY=1
OUT to Command
Register
Device Busy After
Command Code Out
Data Out
Command
10 us
Status Register
BSY=1
256th Read From
Data Register
Device Busy After
Data Transfer In
30 sec
Status Register
BSY=0 & DRQ=1,
Interrupt
Status Register
BSY=1
Interrupt, DRQ
For Data Transfer
In
400 ns
Status Register
BSY=1
OUT To Command
Register
Device Busy After
Command Code Out
Data In
Command
31 sec
Status Register
BSY=0 and RDY=1
Bus RESET Signal
Asserted
Device Ready
After Hard Reset
400 ns
Status Register
BSY=1
Bus RESET Signal
Asserted
Device Busy After
Hard Reset
Hard
Reset
31 sec
Status Register
BSY=0 and RDY=1
Device Control
Register RST=0
After RST=1
Device Ready
After Software
Reset
400 ns
Status Register
BSY=1
Device Control
Register RST=1
Device Busy After
Software Reset
Software
Reset
31 sec
Status Register
BSY=1 and RDY=1
Power On
Device Ready
After Power On
400 ns
Status Register
BSY=1
Power On
Device Busy After
Power On
Power On
Time-out
Stop
Start
Interval
Function
Figure 147. Time-out values
Command category is referred to in 11.0
, “Command Protocol” on page 30.
The abbreviations "ns", "us", "ms," and "sec" mean nanoseconds, microseconds, milliseconds, and
seconds, respectively.
If the host detects a timeout while waiting for a response from the device, we recommend that the host
system execute a Soft reset and then retry the command.
Deskstar 40GV & 75GXP hard disk drive specifications
193