Processor Configuration Registers
Table 2-2.
Register Attribute Modifiers
Attribute
Modifier
Applicable
Attribute
Description
RO (w/ -V)
RW
Sticky: These bits are only re-initialized to their Reset Value by a
"Power Good Reset".
S
Note: Does not apply to RO (constant) bits.
RW1C
RW1S
Key: These bits control the ability to write other bits (identified
-K
-L
RW
RW
WO
RW
with a 'Lock' modifier)
Lock: Hardware can make these bits "Read Only" using a separate
configuration bit or other logic.
Note: Mutually exclusive with 'Once' modifier.
Once: After reset, these bits can only be written by software once,
after which they become "Read Only".
-O
WO
RO
Note: Mutually exclusive with 'Lock' modifier and does not make
sense with 'Variant' modifier.
Firmware Write: The value of these bits can be updated by
firmware (PCU, TAP, and so on).
-FW
-V
Variant: The value of these bits can be updated by hardware.
RO
Note: RW1C and RC bits are variant by definition and therefore
do not need to be modified.
2.2
PCI Devices and Functions
Table 2-3.
PCI Devices and Functions
Description
DID
Device
Function
DRAM Controller
0154h
0151h
0155h
0159h
0156h
015Dh
0
1
1
1
2
6
0
0
1
2
0
0
PCI Express* Controller
PCI Express Controller
PCI Express Controller
Integrated Graphics Device
PCI Express Controller
Note: Not all devices are enabled in all configurations.
16
Datasheet, Volume 2
INTEL [ INTEL ]
