General Operation Descriptions; Reset Response - Hitachi IC25N040ATCS04-0 - Travelstar 40GN 40GB UDMA/100 4200RPM 2MB 2.5" IDE Hard Drive Specifications

11.0 General operation descriptions

11.1 Reset response

ATA has the following three types of resets:
Power On Reset (POR)
Hard Reset (Hardware Reset)
Soft Reset (Software Reset)
The actions of each reset are shown in Figure 57 on page 74.
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.
The RESET signal is negated in the ATA Bus. The device resets the
interface circuitry and sets the default values.
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 require-
ment.
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
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