Samsung SpinPoint M8 - Idle (E3 H); Idle Immediate (E1 H); Table 8-6 Automatic Standby Timer Periods

Spinpoint M8 Product Manual REV 2.7
55
Word
Content
Description
2 1= Security locked
1 1= Security enabled
0 1= Security supported
129-159
0000h
Vendor specific
160
0000h
CFA power mode 1
161-175
0000h
Reserved for CFA
176-205
0000h
Current media serial number
206-254
0000h
Reserved
255
xxxxh
Integrity word
15-8 Checksum
5 Signature (A5h)
8.2.8 Idle (E3h)
This command causes the drive to enter the Idle Mode, clear BSY, and generate an interrupt. The interrupt is
generated even though the drive may not have fully transitioned to Idle Mode.
If the drive is already spinning, the spin-up sequence is not executed.
If the Sector Count register is non-zero, then the automatic Idle Mode sequence is enabled, and the timer
begins counting down immediately. If the Sector Count register is zero, the automatic power down sequence
is disabled
.
After the drive enters Idle Mode, it automatically transitions to Standby Mode upon expiration of a prescribed
1 minute spin-down timer.
Table 8-6 Automatic Standby Timer Periods
Sector Count Register Contents
Corresponding Time-Out Period
0 (00h)
Timeout Disabled
1-240 (01h-FOh)
(value * 5) seconds
241-251 (F1h-FBh)
(value - 240) * 30 minutes
252 (FCh)
21 minutes
253 (FDh)
8 hours
254 (FEh) Reserved
255 (FFh)
21 minutes 15 seconds
8.2.9 Idle Immediate (E1h)
This command causes the drive to enter Idle Mode, clear BSY, and generate an interrupt. The interrupt is
generated even though the drive may not have fully transitioned to Idle Mode.