Specifications
SLEEP
Mode
IDLE
(Power-save)
Mode
STANDBY
Mode
ACTIVE
Mode
Start Power Save
and
Standby Timers
Restart
Standby Timer
and
Power Save Timer
Set Standby
Timer Value
Set Power Save
Timer Value
Set Power Save
Timer Value
Set Standby
Timer Value
Sect Cnt = 00
Sect Cnt = FF
E6
H
Soft Reset
Sect Cnt = 00
Sect Cnt = FF
E5
H
FD
H
E6
H
E5
H
/FD
H
E6
H
Hard Reset
FA
H
E2
H
FA
H
E2
H
E0
H
or Standby Timer Expired
Disc Access Command
E1
H
/F9
H
FB
H
E3
H
F8
H
Disc Access Command
F8 or Power Save Timer Expired
E1
H
/F9
H
E3
H
FB
H
FA
H
Sect Cnt = FF
E3
H
E0
H
or Standby Timer Expired
FB
H
Set Power Save
Timer Value
FD
H
E5
H
E2
H
Disc Access command
Hard Reset
Hard Reset
Figure 10. Alternate power mode transition diagram
ATA Interface Reference Manual, Rev. C 61