General Operation Descriptions; Reset Response - IBM DTTA-351010 - Deskstar 10.1 GB Hard Drive Specifications

10.0 General Operation Descriptions

10.1 Reset Response

There are three types of reset in ATA as follows:
Power On Reset (POR)
Hard Reset (Hardware Reset)
Soft Reset (Software Reset)
The actions of each reset is shown in Figure 62
A b o r t i n g H o s t i n t e r f a c e
A b o r t i n g D e v i c e o p e r a t i o n
I n i t i a l i z a t i o n o f h a r d w a r e
I n t e r n a l d i a g n o s t i c
S p i n n i n g s p i n d l e
I n i t i a l i z a t i o n o f r e g i s t e r s
D A S P h a n d s h a k e
P D I A G h a n d s h a k e
R e v e r t i n g p r o g r a m m e d p a r a m e t e r s t o d e f a u l t
N u m b e r o f C H S
( s e t b y I n i t i a l i z e D e v i c e P a r a m e t e r )
M u l t i p l e m o d e
W r i t e c a c h e
R e a d l o o k a h e a d
E C C b y t e s
D i s a b l e S t a n d b y t i m e r
P o w e r m o d e
o e x e c u t e
x n o t e x e c u t e
Figure 62. Reset Response Table
Note.
(*1) Execute after the data in write cache has been written.
(*2) Default value on P O R is shown in Figure 63 on page 74.
(*3) The Set Features command with Feature register = CCh enables the device to revert these
parameters to the power on defaults.
Copyright IBM Corp. 1998
The device executes a series of electrical circuitry diagnostics, spins up the
HDA, tests speed and other mechanical parametrics, and sets default
values.
RESET- signal is negated in ATA Bus.
The device resets the interface circuitry as well as Soft 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.
( * 2 )
P O R h a r d s o f t
r e s e t r e s e t
o o
( * 1 ) ( * 1 )
o x x
o x x
o x x
o o o
o o x
o o o
o ( * 3 ) ( * 3 )
o x x
I d l e ( * 4 ) ( * 4 )
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