Time-Out Values; Figure 136. Time-Out Values - IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive Specifications

14.0 Time-out values

The timing of BSY and DRQ in Status Register are shown in the table below.
INTERVAL
Power On Device Busy
After Power On
Device Ready
After Power On
Software Device Busy
Reset After Software
Reset
Device Ready
After Software
Reset
Hard Reset Device Busy
After Hard
Reset
Device Ready
After Hard
Reset
Data In Device Busy
Command After Command
Code Out
Interrupt, DRQ
For Data
Transfer In
Device Busy
After Data
Transfer In
Data Out Device Busy
Command After Command
Code Out
Data Request
For Data
Transfer Out
Device Busy
After Data
Transfer Out
Interrupt For
Data Transfer
Out
Non-Data Device Busy
Command After Command
Code Out
Interrupt For
Command
Complete
DMA Data Device Busy
Transfer After Command
Command Code Out

Figure 136. Time-out values

Command category is referred to in Section 12.0, "Command protocol" on page 103.
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.
START
Power On
Power On
Device Control
Register RST=1
Device Control
Register RST=0
After 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
OUT to Command
Register
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
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
Status Register
BSY=1
197
TIME-OUT
400 ns
31 sec
400 ns
31 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.)
400 ns