Table 6. Mrc Progress Codes - Intel R1000SPO series Service Manual

Intel ® Server System R1000SPO Product Family System Integration and Service Guide
POST Memory Initialization MRC Diagnostic Codes
There are two types of POST Diagnostic Codes displayed by the MRC during memory initialization; Progress
Codes and Fatal Error Codes.
The MRC Progress Codes are displays to the Diagnostic LEDs that show the execution point in the MRC
operational path at each step.
LED #
Upper Nibble
Checkpoint
Lower Nibble
MRC Progress Codes
Upper Nibble
B0h
Lower Nibble
Upper Nibble
B1h
Lower Nibble
Upper Nibble
B2h
Lower Nibble
Upper Nibble
B3h
Lower Nibble
Upper Nibble
B4h
Lower Nibble
Upper Nibble
B5h
Lower Nibble
Upper Nibble
B6h
Lower Nibble
Upper Nibble
B7h
Lower Nibble
Upper Nibble
B8h
Lower Nibble
Upper Nibble
B9h
Lower Nibble
Upper Nibble
BAh
Lower Nibble
Upper Nibble
BBh
Lower Nibble
Upper Nibble
BCh
Lower Nibble

Table 6. MRC Progress Codes

Diagnostic LED Decoder
LED 3 LED 2 LED 1
8h (MSB) 4h 2h
8h (MSB) 4h 2h
ON off ON
off off off
ON off ON
off off off
ON off ON
off off ON
ON off ON
off off ON
ON off ON
off ON off
ON off ON
off ON off
ON off ON
off ON ON
ON off ON
off ON ON
ON off ON
ON off off
ON off ON
ON off off
ON off ON
ON off ON
ON off ON
ON off ON
ON off ON
ON ON off
LED 0
1h (LSB)
1h (LSB)
ON
Detect DIMM population
off
ON
ON
ON
Gather remaining SPD data
off
ON
Program registers on the memory controller level
ON
ON
Evaluate RAS modes and save rank information
off
ON
Program registers on the channel level
ON
ON
Perform the JEDEC defined initialization sequence
off
ON
ON
ON
off
ON
Hardware memory test and init
ON
ON
Execute software memory init
off
ON
Program memory map and interleaving
ON
ON
Program RAS configuration
off
Description
Set DDR4 frequency
Train DDR4 ranks
Initialize CLTT/OLTT
79