Figure 28 Power Conditions - Hitachi HTS541616J9AT00 - Travelstar 160 GB Hard Drive Specifications

2.5 inch ata/ide hard disk drive
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12.5.5 Interface Capability for Power Modes
Each power mode affects the physical interface as defined in the following table:
Mode
Active
Idle
Standby
Sleep

Figure 28 Power conditions

Ready(RDY) is not a power condition. A device may post ready at the interface even though the media may not be
accessible.
Though the interface is inactive in sleep mode, the access to the interface registers and the validity of INTRQ is
guaranteed for two seconds after Sleep command is completed. After this period, the contents of interface registers
may be lost. Since the contents of interface registers may be invalid,
host should NOT check Status register nor Alternate Status register prior to issuing soft reset to wake up a device.
12.5.6 Initial Power Mode at Power On
After power on or hard reset the device goes to IDLE mode or STANDBY mode depending on the option. Refer
Functional Specification Part for the initial power mode selection.
Travelstar 5K160 (PATA) Hard Disk Drive Specification
BSY
x
0
0
x
RDY
Interface active
x
Yes
1
Yes
1
Yes
x
No
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Media
Active
Active
Inactive
Inactive

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