Register Description
48
Datasheet
8
RW
0
CHANNEL0_ACTIVE
When set, indicate MC channel 0 is active. This bit is controlled (set/reset) by
software only. This bit is required to be set for any active channel when
INIT_DONE is set by software. Channel 0 AND Channel 1 active must both be
set for a lockstep or mirrored pair.
7
WO
0
INIT_DONE
MC initialize complete signal. Setting this bit will exit the training mode of the
Integrated Memory Controller and begin normal operation including all
enabled maintenance operations. Any CHANNNEL_ACTIVE bits not set when
writing a 1 to INIT_DONE will cause the corresponding channel to be
disabled.
6
RW
0
DIVBY3EN
Divide By 3 enable. When set, MAD would use the longer pipeline for
transactions that are 3 or 6 way interleaved and shorter pipeline for all other
transactions. The SAG registers must be appropriately programmed as well.
5
RW
0
CHANNELRESET2
Reset only the state within the channel. Equivalent to pulling warm reset for
that channel.
4
RW
0
CHANNELRESET1
Reset only the state within the channel. Equivalent to pulling warm reset for
that channel.
3
RW
0
CHANNELRESET0
Reset only the state within the channel. Equivalent to pulling warm reset for
that channel.
2
RW
0
AUTOPRECHARGE.
Autoprecharge enable. This bit should be set with the closed page bit. If it is
not set with closed page, address decode will be done without setting the
autoprecharge bit.
1
RW
0
ECCEN: ECC Enable
ECC Checking enables. When this bit is set in lockstep mode the ECC
checking is for the x8 SDDC. ECCEN without Lockstep enables the x4 SDDC
ECC checking.
0
RW
0
CLOSED_PAGE
When set, the MC supports a Closed Page policy. The default is Open Page
but BIOS should always configure this bit.
Device:
3
Function: 0
Offset:
48h
Access as a Dword
Содержание I7-900 DEKSTOP SPECIFICATION
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