Hitachi HDS725050KLA360 Specifications - Page 251

Time-out values

Page 251 highlights

13.0 Time-out values The timing of BSY and DRQ in Status Register are shown in the table below. Table 175: Time-out values INTERVAL START STOP Power On Device Busy After Power Power On On Device Ready After Power On Power On Software Reset Device Busy After Soft- Device Control Register ware Reset RST=1 Device Ready After Soft- Device Control Register ware Reset RST=0 After RST=1 Hard Reset Device Busy After Hard Bus RESET Signal Reset Asserted Device Ready After Hard Bus RESET Signal Reset Asserted Data In Com- Device Busy After Com- OUT To Command Reg- mand mand Code Out ister Interrupt, DRQ For Data Status Register BSY=1 Transfer In Device Busy After Data 256th Read From Data Transfer In Register Data Out Com- Device Busy After Com- OUT to Command Reg- mand mand Code Out ister Device Busy After Data 256th Write From Data Transfer Out Register Interrupt For Data Trans- Status Register BSY=1 fer Out Non-Data Command Device Busy After Com- OUT to Command Reg- mand Code Out ister Interrupt For Command Status Register BSY=1 Complete DMA Data Device Busy After Com- OUT to Command Reg- Transfer Com- mand Code Out ister mand 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 TIME-OUT 400 ns 31 sec 400 ns 31 sec 400 ns 31 sec 400 ns 30 sec 10 µs 400 ns 5 µs 30 sec 400 ns 30 sec 400 ns Command category is referred to in section 11.0, "Command protocol" on page 101. The abbreviations "ns", "µs", "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 7K500 and Deskstar E7K500 Hard Disk Drive Specification 237

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Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
237
13.0
Time-out values
The timing of BSY and DRQ in Status Register are shown in the table below.
Command category is referred to in section 11.0, "Command protocol" on page 101.
The abbreviations "ns", "
µ
s
", "ms," and "sec" mean nanoseconds, microseconds, milliseconds, and sec-
onds, 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.
.
Table 175: 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=1
and RDY=1
31 sec
Software
Reset
Device Busy After Soft-
ware Reset
Device Control Register
RST=1
Status Register BSY=1
400 ns
Device Ready After Soft-
ware Reset
Device Control Register
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 Reg-
ister
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 Trans-
fer Out
Status Register BSY=1
Status Register BSY=0
and RDY=1 Interrupt
30 sec
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
DMA Data
Transfer Com-
mand
Device Busy After Com-
mand Code Out
OUT to Command Reg-
ister
Status Register BSY=1
400 ns