General Operation Descriptions; Reset Response - IBM IC25N020ATDA04 - Travelstar 20 GB 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 59 on page 78.
The device executes a series of electrical circuitry diagnostics, spins up
the HDA, 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
requirement.
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
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