Intel Xeon L3406 CM80616005010AA User Manual
Product codes
CM80616005010AA
Processor Uncore Configuration Registers
224
Datasheet, Volume 2
4.7.8
MC_CFG_LOCK
BIOS must write the MC_CFG_LOCK bit after configuration is complete to allow the
Integrated Memory Controller to start accepting requests.
Integrated Memory Controller to start accepting requests.
3:2
RW
0
MAXNUMRANK. Maximum Number of Ranks
00 = Single Ranked
01 = Double Ranked
10 = Quad Ranked
00 = Single Ranked
01 = Double Ranked
10 = Quad Ranked
1:0
RW
0
MAXNUMDIMMS. Maximum Number of DIMMs
00 = 1 DIMM
01 = 2 DIMMs
10 = 3 DIMMs
11 = Reserved
00 = 1 DIMM
01 = 2 DIMMs
10 = 3 DIMMs
11 = Reserved
Device:
3
Function:
0
Offset:
64h
Access as a DWord
Bit
Attr
Default
Description
Device:
3
Function:
0
Offset:
68h
Access as a DWord
Bit
Attr
Default
Description
31:2
RO
0
Reserved
1
WO
0
MC_CFG_UNLOCK
This bit unlocks the Integrated Memory Controller configuration registers
This bit unlocks the Integrated Memory Controller configuration registers
without processor reset. This bit does NOT unlock any other lock type
without a processor reset.
0
WO
0
MC_CFG_LOCK
This bit locks the Integrated Memory Controller configuration registers.
This bit locks the Integrated Memory Controller configuration registers.
Writes are no longer allowed to the configuration registers.