Hitachi HTS541010G9AT00 Specifications - Page 63

General operation descriptions

Page 63 highlights

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 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. 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 POR O O O O O Comreset O (*1) X X X O (*6) soft reset O (*1) X X X O (*3) 0 (*5) x (*4) x (*4) O - execute X - does not execute Notes: (*1) (*2) (*3) (*4) (*5) (*6) Execute after the data in write cache has been written. The default value on POR is shown in Table 30: "Default Register Values" on page 52. The Set Features command with Feature register = CCh enables the device to revert these parameters to the power on defaults. In the case of Sleep mode, the device goes to Standby mode. In other cases, the device does not change current mode. Idle when Power-Up in Standby feature set is disabled. Standby when Power-Up in Standby feature set is enabled. See section Software Setting Preservation feature. Travelstar 5K100 (Serial ATA) Hard Disk Drive Specification 51

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Travelstar 5K100 (Serial ATA) Hard Disk Drive Specification
51
10.0 General operation descriptions
10.1
Reset response
ATA has the following three types of resets:
The actions of each reset are shown in the table below.
O – execute
X – does not execute
Notes:
Power On Reset (POR)
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
COMRESET- signal is negated in Serial ATA Bus.
The device resets the interface circutitry as well as Soft Reset.
Soft Reset (Software 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.
Table 29: Reset response table
POR
Comreset
soft reset
Aborting Host interface
-
O
O
Aborting Device operation
-
(*1)
(*1)
Initialization of hardware
O
X
X
Internal diagnostic
O
X
X
Spinning spindle
O
X
X
Initialization of registers (*2)
O
O
O
Reverting programmed parameters to default
Number of CHS (set by Initialize
Device Parameters)
Multiple mode
Write Cache
Read look-ahead
ECC bytes
O
(*6)
(*3)
Disable Standby timer
0
x
x
Power mode
(*5)
(*4)
(*4)
(*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.