Processor Configuration Registers
Intel
®
Core
TM
i7-660UE, i7-620LE/UE, i7-610E, i5-520E, i3-330E and Intel
®
Celeron
®
Processor P4505, U3405 Series
Datasheet Addendum
August 2010
72
Document Number: 323178-003
6.1.1
DEVEN - Device Enable
B/D/F/Type:
0/0/0/PCI
Address Offset:
54-57h
Default Value:
0000010Bh
Access:
RW-L; RO; RW
Size:
32 bits
BIOS Optimal Default
000000h
Allows for enabling/disabling of PCI devices and functions that are within the processor.
The table below the bit definitions describes the behavior of all combinations of
transactions to devices controlled by this register. All the bits in this register are Intel
TXT Lockable.
Table 15. DEVEN - Device Enable Register
Bit
Access
Default
Value
RST/
PWR
Description
31:15
RO
0h
Reserved
14
RW-L
0b
Core
Reserved
13
RW-L
0b
Core
PEG1 Enable (D6EN)
0 = Bus 0 Device 6 Function 0 is disabled
and hidden.
1 = Bus 0 Device 6 Function 0 is enabled
and visible.
12:12
RO
0h
Reserved
11
RW-L
0b
Core
Reserved
10
RW-L
0b
Core
Reserved
9:9
RO
0h
Reserved
8
RW-L
1b
Core
Reserved
7:4
RO
0h
Reserved
3
RW-L
1b
Core
Internal Graphics Engine Function 0
(D2F0EN)
0 = Bus 0 Device 2 Function 0 is disabled
and hidden
1 = Bus 0 Device 2 Function 0 is enabled
and visible
2:2
RO
0h
Reserved
1
RW-L
1b
Core
PCI Express Port (D1EN)
0 = Bus 0 Device 1 Function 0 is disabled
and hidden.
1 = Bus 0 Device 1 Function 0 is enabled
and visible.
0
RO
1b
Core
Host Bridge (D0EN)
Bus 0 Device 0 Function 0 may not be
disabled and is therefore hard wired to 1.