Mem_Trml_Estimation_Config-Memory Thermal Estimation Configuration Register - Intel 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - DATASHEET VOLUME 2 01-2011 Datasheet

Processor Configuration Registers
2.19.1 MEM_TRML_ESTIMATION_CONFIG—Memory Thermal
Estimation Configuration Register
This register contains configuration regarding VTS temperature estimation calculations
that are done by PCODE. For the BW estimation mode, the following formula is used:
VTS temperature estimation = T(n) + VTS_Offset
where T(n) = (1 – VTS_TIME_CONSTANT) * T(n–1) + VTS_MUTXTIPLIER *
(MEM_ACC(n) – MEM_ACC(n–1)), where (MEM_ACC(n) – MEM_ACC(n–1) equals
memory bandwidth
This register is read by PCODE only during Reset Phase 4.
B/D/F/Type:
Address Offset:
Reset Value:
Access:
Size:
BIOS Optimal Default
Bit
31:22
21:12
11:11
10:4
3:3
2
1
0
Datasheet, Volume 2
0/0/0/MCHBAR PCU
5880–5883h
438C8324h
RW
32 bits
0h
Reset RST/
Attr
Value PWR
RW 10Eh Uncore
RW 0C8h Uncore
RO 0h
RW 32h Uncore
RO 0h
RW 1b Uncore
RW 0b Uncore
RW 0b Uncore
Description
VTS multiplier (VTS_MUTXTIPLIER)
The VTS multiplier serves as a multiplier for the translation of the
memory BW to temperature. The units are given in 1 /
power(2,44).
VTS time constant (VTS_TIME_CONSTANT)
This factor is relevant only for BW based temperature estimation.
It is equal to "1 minus alpha".
The value of the time constant (1 – alpha) is determined by
VTS_TIME_CONSTANT / power(2,25) per 1 mSec.
Reserved
VTS offset adder (VTS_OFFSET)
The offset is intended to provide a temperature proxy offset, so the
option of having a fixed adder to VTS output is available.
Reserved
Disable EXTTS (DISABLE_EXTTS)
When set, PCODE should ignore EXTTS indication that is obtained
from the PCH and will rely on PECI or DDR BW estimations.
Disable Bandwidth Estimation (DISABLE_BW_ESTIMATION)
When set, PCODE should ignore DDR BW estimation that is
obtained from the memory controller and will rely on PECI or
EXTTS.
Disable PECI Control (DISABLE_PECI_CONTROL)
When set, PCODE should ignore DDR temperature that is given by
PECI.
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