Specifications

Start Idle and
Standby Timers
Restart
Standby Timer
and Idle Timer
Set Standby
Timer Value
Set Idle
Timer Value
Set Idle
Timer Value
Set Standby
Timer Value
Sect Cnt = 00
Sect Cnt = FF
FD
H
98
H
/E5
H
99
H
/E6
H
Soft Reset
Sect Cnt = 00
Sect Cnt = FF
98
H
/E5
H
FD
H
99
H
/E6
H
Disc Access Command
98
H
/E5
H
/FD
H
99
H
/E6
H
Hard Reset
FA
H
96
H
/E2
H
FA
H
FA
H
96
H
/E2
H
94
H
/E0
H
or Standby Timer Expired
Disc Access Command or Hard Reset
F9
H
FB
H
97
H
/E3
H
Soft Reset
Hard Reset or Disc Access Command
95
H
/E1
H
/F8
H
or Idle Timer Expired
F9
H
97
H
/E3
H
FB
H
Soft Reset
Soft Reset
96
H
/E2
H
Sect Cnt = FF
97
H
/E3
H
95
H
/E1
H
/F8
H
94
H
/E0
H
or Standby Timer Expired
ACTIVE
Mode
IDLE
Mode
STANDBY
Mode
SLEEP
Mode
Figure 9. Power mode transition diagram
ATA Interface Reference Manual, Rev. C 57