Thermal/Mechanical Specifications and Design Guide 63
PECI Interface
Table 7-6. RdPkgConfig() & WrPkgConfig() DRAM Thermal Services Summary
Service
Decimal
Index
Value
(byte)
Parameter
Value
(word)
RdPkgConfig()
Data
(dword)
WrPkgConfig()
Data
(dword)
Description
DRAM Thermal
Estimation
Configuration
Data Read
15 0x0000
DRAM Thermal
Estimation Configu-
ration Data
N/A
Read the DRAM Thermal
Estimation configuration
parameters.
DRAM Thermal
Estimation
Configuration
Data Write
15 0x0000 N/A
DRAM Thermal
Estimation Config-
uration Data
Configure the DRAM Thermal
Estimation parameters.
DRAM Rank
Tem p e ra tur e
Write
18
Channel Index &
DIMM Index
N/A
Absolute
temperature in
Degrees Celsius
for ranks 0, 1, 2 &
3
Write temperature for each
rank within a single DIMM.
DIMM
Tem p e ra tur e
Read
14 Channel Index
Absolute
temperature in
Degrees Celsius for
DIMM 0
N/A
Read temperature of each
DIMM within a channel.
DIMM Ambient
Tem p e ra tur e
Write
19 0x0000 N/A
Absolute
temperature in
Degrees C to be
used as ambient
temperature
reference
Write ambient temperature
reference for activity-based
rank temperature estimation.
DIMM Ambient
Tem p e ra tur e
Read
19 0x0000
Absolute
temperature in
Degrees C to be
used as ambient
temperature
reference
N/A
Read ambient temperature
reference for activity-based
rank temperature estimation.
DRAM Channel
Tem p e ra tur e
Read
22 0x0000
Maximum of all rank
temperatures for
each channel in
Degrees Celsius
N/A
Read the maximum DRAM
channel temperature.
Accumulated
DRAM Energy
Read
04
Channel Index
0x00FF - All
Channels
DRAM energy
consumed by the
DIMMs
N/A
Read the DRAM energy
consumed by all the DIMMs
in all the channels or all the
DIMMs within a specified
channel.
DRAM Power Info
[LOW] Read
35 0x0000
Typical and minimum
DRAM power
settings
N/A
Read DRAM power settings
info to be used by power
limiting entity.
DRAM Power Info
[HIGH] Read
36 0x0000
Maximum DRAM
power settings &
maximum time
window
N/A
Read DRAM power settings
info to be used by power
limiting entity
DRAM Power
Limit Write
34 0x0000 N/A
DRAM Plane Power
Limit Data
Write DRAM Power Limit Data
DRAM Power
Limit Read
34 0x0000
DRAM Plane Power
Limit Data
N/A
Read DRAM Power Limit Data
DRAM Power
Limit
Performance
Status Read
33 0x0000
Accumulated DRAM
throttle time
N/A
Read sum of all time
durations for which each
DIMM has been throttled.
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