ATA R
EGISTERS
SSD-P
XXX
(I)-3100 D
ATA
S
HEET
S
ILICON
S
YSTEMS
P
ROPRIETARY
This document and the information contained within it is confidential and proprietary to SiliconSystems, Inc.
All unauthorized use and/or reproduction is prohibited.
3100P-06DSR
P
AGE
58
F
EBRUARY
2, 2009
D
EVICE
A
DDRESS
R
EGISTER
The Device Address register is used to maintain compatibility with ATA disk
drive interfaces.
Table 45: Device Address Register
Operation
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
Read/Write
-
nWTG nHS3 nHS2 nHS1 nHS0 nDS1 nDS0
Default Value
0
0
1
1
1
1
1
0
Bit(s)
Description
7
Reserved bit.
6
Write Gate (nWTG).
Low when a write to the device is in process.
5-2
nHS3 to nHS0.
The negated binary address of the currently selected
head.
1
nDS1.
Low when drive 1 is selected and active.
0
nDS0.
Low when drive 0 is selected and active.