Appendix E: POST Code Diagnostic LED Decoder
Intel® Server Board S2600CW Family TPS
Revision 2.4
182
Table 94. MRC Progress Codes
Progress
Code
Main Sequence
Subsequences /
subfunctions
0xB0
Detect DIMM population
--n/a--
0x B1
Set DDR4 frequency
--n/a--
0x B2
Gather remaining SPD data
--n/a--
0x B3
Program registers on the memory controller level --n/a--
0x B4
Evaluate RAS modes and save rank information
--n/a--
0x B5
Program registers on the channel level
--n/a--
0x B6
Perform the JEDEC defined initialization sequence --n/a--
0x B7
Train DDR4 ranks
--n/a--
0x01
↓
Read DQ/DQS training
0x02
↓
Receive Enable training
0x03
↓
Write leveling training
0x04
↓
Write DQ/DQS training
0x05
↓
DDR Channel training done
0x B8
Initialize CLTT/OLTT
--n/a--
0x B9
Hardware memory test and init
--n/a--
0x BA
Execute software memory init
--n/a--
0x BB
Program memory map and interleaving
--n/a--
0x BC
Program RAS configuration
--n/a--
0x BF
MRC is done
--n/a--
Memory Initialization at the beginning of POST includes multiple functions, including:
discovery, channel training, validation that the DIMM population is acceptable and functional,