Intel
®
Core
TM
i7-620LE/UE, i7-610E, i5-520E and Intel
®
Celeron
®
Processor P4500, P4505 Series
April 2010
Datasheet Addendum
Document Number: 323178-002
81
Processor Configuration Registers
Reserved and Preserved:
1. Reserved for future RW implementations; software must preserve value read for
writes to bits.
2. Reserved and Zero: Reserved for future R/WC/S implementations; software must
use 0 for writes to bits.
Unless explicitly documented as Reserved and Zero, all bits marked as reserved are
part of the Reserved and Preserved type, which have historically been the typical
definition for Reserved.
It is important to note that most (if not all) control bits in this device cannot be
modified unless the link is down. Software is required to first Disable the link, then
program the registers, and then re-enable the link (which will cause a full-retrain with
the new settings).
Table 23. PCI Device 6 Register (Sheet 1 of 3)
Register Name
Register
Symbol
Register Start
Register End
Default Value
Access
Vendor
Identification
VID6
0
1
8086h
RO
Device
Identification
DID6
2
3
0047h
RO
PCI Command
PCICMD6
4
5
0000h
RO; RW
PCI Status
PCISTS6
6
7
0010h
RO; RWC
Revision
Identification
RID6
8
8
10h
RO
Class Code
CC6
9
B
060400h
RO
Cache Line Size
CL6
C
C
00h
RW
Header Type
HDR6
E
E
01h
RO
Primary Bus
Number
PBUSN6
18
18
00h
RO
Secondary Bus
Number
SBUSN6
19
19
00h
RW
Subordinate Bus
Number
SUBUSN6
1A
1A
00h
RW
I/O Base Address
IOBASE6
1C
1C
F0h
RO; RW
I/O Limit Address
IOLIMIT6
1D
1D
00h
RO; RW
Secondary Status
SSTS6
1E
1F
0000h
RWC; RO
Memory Base
Address
MBASE6
20
21
FFF0h
RO; RW
Memory Limit
Address
MLIMIT6
22
23
0000h
RO; RW
Prefetchable
Memory Base
Address
PMBASE6
24
25
FFF1h
RO; RW