Timings - Hitachi 7K80 - Deskstar - Hard Drive Specifications

13.0 Timings

The timing of BSY and DRQ in Status Register are shown in the table below.
Table 169: Time-out values
Power On Device Busy After
Power On
Device Ready After
Power On
Software Device Busy After Soft-
Reset ware Reset
Device Ready After
Software Reset
Hard Reset Device Busy After Hard
Reset
Device Ready After
Hard Reset
Data In Com- Device Busy After Com-
mand mand Code Out
Interrupt, DRQ For Data
Transfer In
Device Busy After Data
Transfer In
Data Out Device Busy After Com-
Command mand Code Out
Device Busy After Data
Transfer Out
Interrupt For Data
Transfer Out
Non-Data Device Busy After Com-
Command mand Code Out
Interrupt For Command
Complete
DMA Data Device Busy After Com-
Transfer mand Code Out
Command
Command category is referred to in section 11.0, "Command protocol" on page 109.
The abbreviations "ns", "
onds, respectively.
If the host detects a time-out while waiting for a response from the device, it is recommend that the host
system execute a Soft reset and then retry the command.
.
INTERVAL
Power On
Power On
Device Control Regis-
ter RST=1
Device Control Regis-
ter 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 Reg-
ister
256th Write From Data
Register
Status Register BSY=1
OUT to Command Reg-
ister
Status Register BSY=1
OUT to Command Reg-
ister
µ s
", "ms," and "sec" mean nanoseconds, microseconds, milliseconds, and sec-
Deskstar 7K80 Hard Disk Drive Specification
START
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
247
STOP TIME-OUT
400 ns
31 sec
400 ns
31 sec
400 ns
31 sec
400 ns
30 sec
10 µ s
400 ns
5 µ s
30 sec
400 ns
30 sec
400 ns