EW31244SL7QV Datasheet, PDF (168/252 Pages) Intel Corporation – Intel® 31244 PCI-X to Serial ATA Controller

Intel^® 31244 PCI-X to Serial ATA Controller
Programming Interface
5.10.3.3
Table 96.
SU IDE Features Register - SUIFR
The SU IDE Features Register is a write-only register. When this address is read, instead the SU
IDE Error Register is read. The content of the SU IDE Features Register is a command parameter.
the content of this register must be loaded before the SU IDE Command Register is written. The
content of the SU IDE Features Register is command dependent. Refer to the AT Attachment with
Packet Interface-6 (ATA/ATAPI-6) Specification.
SU IDE Features Register - SUIFR
PCI
Attributes
7
4
0
wo wo wo wo wo wo wo wo
Bit
07:00
PCI IDE Mode BAR0/BAR2 Offset
= 01H
Attribute Legend:
RV = Reserved
PR = Preserved
RS = Read/Set
WO = Write Only
RW = Read/Write
RC = Read Clear
RO = Read Only
NA = Not Accessible
Default
00H
Description
Features - This register is command dependent. For example, it may be a parameter as an extension to
the SU IDE Command Register. In the AT Attachment with Packet Interface-6 (ATA/ATAPI-6)
Specification, this register acts as a 2-byte FIFO in order to implement a 16-bit Feature register.
168
April 2004
Developer’s Manual