General Operation Descriptions; Reset Response; Table 29: Reset Response Table - Hitachi HTS541010G9AT00 - Travelstar 100 GB Hard Drive Specifications

10.0 General operation descriptions

10.1 Reset response

ATA has the following three types of resets:
Power On Reset (POR)
COMRESET
Soft Reset (Software Reset)
The actions of each reset are shown in the table below.

Table 29: Reset response table

Aborting Host interface
Aborting Device operation
Initialization of hardware
Internal diagnostic
Spinning spindle
Initialization of registers (*2)
Reverting programmed parameters to default
Number of CHS (set by Initialize
Device Parameters)
Multiple mode
Write Cache
Read look-ahead
ECC bytes
Disable Standby timer
Power mode
O – execute
Notes:
(*1) Execute after the data in write cache has been written.
(*2) The default value on POR is shown in Table 30: "Default Register Values" on page 52.
(*3) The Set Features command with Feature register = CCh enables the device to revert these parameters to the
power on defaults.
(*4) In the case of Sleep mode, the device goes to Standby mode. In other cases, the device does not change current
mode.
(*5) Idle when Power-Up in Standby feature set is disabled. Standby when Power-Up in Standby feature set is
enabled.
(*6) See section Software Setting Preservation feature.
The device executes a series of electrical circuitry diagnostics, spins up the
head disk assembly, tests speed and other mechanical parametric, and sets
default values.
COMRESET- signal is negated in Serial ATA Bus.
The device resets the interface circutitry as well as Soft Reset.
The SRST bit in the Device Control Register is set and then is reset. The device
resets the interface circuitry according to the Set Features requirement.
X – does not execute
Travelstar 5K100 (Serial ATA) Hard Disk Drive Specification
POR
-
-
O
O
O
O
O
0
(*5)
51
Comreset soft reset
O O
(*1) (*1)
X X
X X
X X
O O
(*6) (*3)
x x
(*4) (*4)