EP80579 Datasheet, PDF (833/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
23.1.2.6 Offset 54h: IIOC – IDE I/O Configuration Register
Table 23-24. Offset 54h: IIOC – IDE I/O Configuration Register
Description:
View: PCI
BAR: Configuration
Bus:Device:Function: 0:31:2
Offset Start: 54h
Offset End: 57h
Size: 32 bit
Default: 00000000h
Power Well: Core
Bit Range
31 : 24
23 : 20
19 : 18
17 : 16
15 : 12
11
10
09 : 08
07 : 04
03 : 00
Bit Acronym
Bit Description
Sticky
Reserved
SP2
SSM
PSM
FSBCE
Reserved
Reserved
Reserved
SP1
SBC
Reserved
Scratchpad (SP2): No hardware action taken on these
bits.
Secondary Signals Mode (SSM): Controls the
secondary signals for swap bays.
00 = Normal
01 = Tri-state
10 = Drive Low
11 = Reserved
If BUC.PRS in chipset configuration space is ‘1’, then the
reset states of these bits will be ‘01’ (tri-state) instead of
‘00’ (normal).
Primary Signals Mode (PSM): Controls the primary
signals for swap bays.
00 = Normal
01 = Tri-state
10 = Drive Low
11 = Reserved
If BUC.PRS in chipset configuration space is ‘1’, then the
reset states of these bits will be ‘01’ (tri-state) instead of
‘00’ (normal).
Fast Synchronous Base Clock Enable (FSBCE): When
set, enables fast ATA modes. This overrides the state of
the SCB[3:0] bits in this register.
Reserved
Reserved
Reserved – these were the secondary and primary
command posting enable bits. These do not exist when
parallel ATA is mapped as part of serial ATA, because the
command posting BAR has been removed.
Scratchpad (SP1): No hardware action taken on these
bits.
Synchronous Base Clock (SBC): Clock used to
determine CT and RP timings for synchronous DMA
timings. ‘0’ = 33 MHz clock used, ‘1’ = 66 MHz clock used.
Bit 3 controls the secondary slave device, bit 2 controls
the secondary master device, bit 1 controls the primary
slave device, and bit 0 controls the primary master device.
Bit Reset
Value
0h
0h
00h
00h
0h
0h
0h
0h
0h
0h
Bit Access
RO
RW
RW
RW
RW
RO
RO
RO
RW
RW
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
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