Hitachi HTS421210H9AT00, Specifications

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Travelstar 4K120 Hard Disk Drive Specification
211
14.0 Timings
The timing of BSY and DRQ in Status Register are shown in the table below.
The abbreviations "ns", "
µ
s", "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 sys-
tem time-out would occur for the device.
Table 145: Time-out values
INTERVAL START STOP TIME-OUT
Power On Device Busy After
Power On Power On Status Register BSY=1 400 ns
Device Ready After
Power On Power On Status Register BSY=0
and RDY=1 31 sec
Software
Reset Device Busy After Soft-
ware Reset Device Control Regis-
ter RST=1 Status Register BSY=1 400 ns
Device Ready After
Software Reset Device Control Regis-
ter RST=0 After RST=1 Status Register BSY=0
and RDY=1 31 sec
Hard Reset Device Busy After Hard
Reset Bus RESET Signal
Asserted Status Register BSY=1 400 ns
Device Ready After
Hard Reset Bus RESET Signal
Asserted Status Register BSY=0
and RDY=1 31 sec
Data In Com-
mand Device Busy After Com-
mand Code Out OUT To Command
Register Status Register BSY=1 400 ns
Interrupt, DRQ For Data
Transfer In Status Register BSY=1 Status Register BSY=0
and DRQ=1 Interrupt 30 sec
Device Busy After Data
Transfer In 256th Read From Data
Register Status Register BSY=1 10
µ
s
Data Out Com-
mand Device Busy After Com-
mand Code Out OUT to Command Reg-
ister Status Register BSY=1 400 ns
Device Busy After Data
Transfer Out 256th Write From Data
Register Status Register BSY=1 5
µ
s
Interrupt For Data
Transfer Out Status Register BSY=1 Status Register BSY=0
and RDY=1 Interrupt 30 sec
(Note 1)
Non-Data
Command Device Busy After Com-
mand Code Out OUT to Command Reg-
ister Status Register BSY=1 400 ns
Interrupt For Command
Complete Status Register BSY=1 Interrupt 30 sec
(Note 2)
DMA Data
Transfer Com-
mand Device Busy After Com-
mand Code Out OUT to Command Reg-
ister Status Register BSY=1 400 ns