IBM DBCA-204860 - Travelstar 4.8 GB Hard Drive, Specifications

Page: 73 / 190

10.0 General Operation Descriptions
10.1 Reset Response
There are three types of reset in ATA as follows:
Power On Reset (POR)
The device executes a series of electrical circuitry diagnostics, spins up the
HDA, tests speed and other mechanical parametric, and sets default
values.
Hard Reset (Hardware Reset) RESET- signal is negated in ATA Bus.
The device executes a series of electrical circuitry diagnostics, spins up the
HDA, tests speed and other mechanical parametric, and sets default
values.
Soft Reset (Software Reset) SRST bit in the Device Control Register is set, then is reset.
The device resets the interface circuitry according to the Set Features
requirement.
The actions of each reset is shown in Figure 45 on page 66.

Copyright IBM Corp. 1998
65