Intel I7-900 DESKTOP PROCESSOR - DATASHEET VOLUME 2 Datasheet page 97

Register Description
2.13.11 MC_DDR_THERM_STATUS0
MC_DDR_THERM_STATUS1
MC_DDR_THERM_STATUS2
This register contains the status portion of the DDR_THERM# functionality as described
in the processor datasheet (i.e., what is happening or has happened with respect to the
pin).
Device:
Function: 3
Offset:
Access as a Dword
Bit
2
1
0
2.14 Integrated Memory Controller Miscellaneous
Registers
2.14.1 MC_DIMM_CLK_RATIO_STATUS
This register contains status information about DIMM clock ratio.
Device:
Function: 4
Offset:
Access as a Dword
Bit
28:24
4:0
Datasheet
4, 5, 6
A4h
Reset
Type
Value
ASSERTION.
RO 0
An assertion edge was seen on DDR_THERM#. Write-1-to-clear.
DEASSERTION.
RO 0
A de-assertion edge was seen on DDR_THERM#. Write-1-to-clear.
STATE.
Present logical state of DDR_THERM# bit. This is a static indication of the pin,
and may be several clocks out of date due to the delay between the pin and the
RO 0
signal.
STATE = 0 means DDR_THERM# is deasserted
STATE = 1 means DDR_THERM# is asserted
3
50h
Reset
Type
Value
MAX_RATIO. Maximum ratio allowed by the part.
Value = Qclk
00000 = RSVD
RO 0
00110 = 800 MHz
01000 = 1066 MHz
01010 = 1333 MHz
QCLK_RATIO. Current ratio of Qclk.
Value = Qclk.
00000 = RSVD
RO 0
00110 = 800 MHz
01000 = 1066 MHz
01010 = 1333 MHz
Description
Description
97