Clock
CKN[3:0], CKP[3:0]
Contol
CKE[3:0]
Command
MA[16:0], BG[1:0], BA[1:0], ACT#, PAR
Strobe
DQSP[7:0], DQSN[7:0]
ECC Strobe
DQSP[8], DQSN[8]
DATA
DQ[63:0]
ECC DATA
DQ[71:64]
Alert
ALERT#
Reset
DRAM_RESET#
Rcomp
DDR_RCOMP[2:0]
Guideline Terminology Descriptions
Via Count
Motherboard Layer Signal Transition Via Placement Locations. For SO-DIMM designs this identifies the
PTH Via Placement Locations. For DRAM Down designs this doesn’t identify the total count of micro-vias
or buried vias on a signal.
Total max length
Total length refers to the signal trace length calculated from Processor die pad to each DRAM ball or each
DIMM connector pin Which include Processor inner PKG trace length, Break-out, Main and Break-in trace
segments of each DRAM
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