Intel C2518 FH8065501516710 Data Sheet

Product codes
FH8065501516710
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Volume 2—SMBus 2.0 Unit 2 - PECI—C2000 Product Family
DRAM Thermal Capabilities
Intel
®
 Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 2 of 3
September 2014
410
Order Number: 330061-002US
17.8
DRAM Thermal Capabilities
Various DRAM component temperature data can be accessed using the RdPkgConfig() 
and WrPkgConfig() PECI commands addressed to the SoC. See 
 and 
 for the 
format of the commands. The accessible data structures are given in 
 which 
contains the values of the command’s Index, Parameter, and PECI Data fields.
Table 17-24. Summary of DRAM Thermal Services
Service 
Index 
Field 
(Decimal) 
Parameter 
Field 
(Word) 
PECI Data Field
(DWord) 
Description
Alternate 
In-band 
MSR or 
CSR 
Access
Supported
WrPkgConfig()
DRAM Rank 
Temperature 
Write
18
Channel 
Index
and
DIMM 
Index
1
1. See 
Absolute 
temperature in 
Degrees Celsius 
for ranks 0-3
2
2. See 
Write the 
temperature 
for each Rank 
within a 
single DIMM
none
Yes
RdPkgConfig()
DRAM Channel 
Temperature 
Read 
22
0x0000
Maximum of all 
rank 
temperatures for 
each channel in 
Degrees Celsius
Read the 
maximum 
DRAM 
Channel 
Temperature
none
Yes
WrPkgConfig()
RdPkgConfig()
DIMM Ambient 
Temperature 
Write/Read
19
0x0000
Absolute 
temperature in 
Degrees C to be 
used as ambient 
temperature 
reference
Write/Read 
ambient 
temperature 
reference for 
activity-based 
Rank 
Temperature 
estimation
none
No
Figure 17-9. Channel Index and DIMM Index Parameter Word
Table 17-25. Channel Index and DIMM Index
Index 
Encoding
Physical
Channel Number
Physical
DIMM Number
000 0  0 
001 1  1 
010 Reserved
011 Reserved
3
15
6
2
0
Reserved
Channel 
Index
DIMM 
Index
5
3