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
79
Processor Configuration Registers
6.1.7
C1WRDATACTRL - Channel 1 Write Data Control
B/D/F/Type:
0/0/0/MCHBAR
Address Offset:
64D-64Fh
Default Value:
004111h
Access:
RW
Size:
24 bits
BIOS Optimal Default
00h
6.1.8
C1ECCERRLOG - Channel 1 ECC Error Log
B/D/F/Type:
0/0/0/MCHBAR
Address Offset:
680 -687h
Default Value:
0000000000000000h
Access:
RO; RO-V-S
Size:
64 bits
This register is used to store the error status information in ECC enabled
configurations, along with the error syndrome and the rank/bank/row/column address
information of the address block of main memory of which an error (single bit or multi-
bit error) has occurred. Note that the address fields represent the address of the first
single or the first multiple bit error occurrence after the error flag bits in the ERRSTS
register have been cleared by software. A multiple bit error will overwrite a single bit
error. Once the error flag bits are set as a result of an error, this bit field is locked and
doesn't change as a result of a new error until the error flag is cleared by software.
Same is the case with error syndrome field, but the following priority needs to be
followed if more than one error occurs on one or more of the 4 QWs. MERR on QW0
MERR on QW1 MERR on QW2 MERR on QW3 CERR on QW0 CERR on QW1 CERR on
QW2 CERR on QW3.
Table 21. Channel 1 Write Data Control Registers
Bit
Access
Default
Value
RST/
PWR
Description
23:16
RW
00h
Core
ECC bit invert vector (C1sd_cr_eccbitinv):
This vector operates individually for every ECC
bit in the selected 64b ECC block, during write
to DRAM. For all k between 0 and 7, when
bit(k) is set to 1, the value for the k ECC bit
(which corresponds with k data byte lane) is
inverted. Otherwise, the value for the k ECC bit
is not affected.
15
RW
0b
Core
ECC Diagnostic Enable
(C1sd_cr_eccdiagen):
1: The ECC bit invert vector is used to invert
selected ECC bits, during writes to DRAM.
0: The diagnostic feature is turned off.
14:0
RW
4110h
Core
Reserved