REVISION HISTORY
Revision Author Date Status and Description
Rev0.1 B.Gervasi
05/25/
17
DDR5 Initial Format Rev0.1, Changed all timing values to 16-
bit values with fixed time-
base, Removed references to LPDDR5
Rev0.7 C.Cox 2/28/18
Update to file, moved to book format. Removed DRAM parametric values that were
sta
tic in the DRAM specification. With the adoption of 1024B SPD size, content locations
and areas were move to allow co-location of block regions. Since the module definitions
are still not solidified in the module TG, the Module Appendix are being moved to
independent files in the books system, allowing them to be balloted later as their specs
are defined. The full draft spec will not be published until at least the first draft of the core
appendixes are completed (UDIMM, RDIMM, LRDIMM and likely NVDIMM).
Rev 0.8 B. Gervasi
10/30/
18
Moved all examples to a separate page derived from the
master spreadsheet. Added
bytes for VDD, VDDQ, VPP. Deleted tRCD, tCCD, tFAW. Assert that NVDIMM will be its
own module type instead of overlay as in DDR4. Expanded Manufacturing Part Number
to 30 bytes.
Rev 0.8
ballot com-
ments
B. Gervasi 11/8/18
Added RFU blocks and renumbered all bytes accor
dingly. Repaired many errors in mod-
ule annexes.
Rev 0.81 B. Gervasi 2/21/19 Added PMIC bytes to all annexes
Rev 0.82 B. Gervasi 4/9/19 Corrected per ballot comments: pointer
to revision byte, module thickness
Rev 0.86 B. Gervasi
10/28/
19
Moved thermal byte to DIMM common annex
Cleaned up symmetrical/asymmetrical DIMM diagr
ams
Added module calculation
Removed duplicated I/O width parameter
Added temperature grades per JESD402-1
Corrected typo in byte 6, 8
Rev 0.87 B. Gervasi
10/29/
19
Removed redundant wording, cleaned up capacity calculation to match byte content
names
Rev 0.88 B. Gervasi
10/29/
19
Corrected thermal byte typo
Renamed Primary and Secondary SDRAMs as First and Second
Cleaned up color coding in examples section
Rev 0.89 B. Gervasi 1/20/20
Removed DDP
Cleaned up first/second DRAM references
Rev 0.90 B. Gervasi 1/21/20 Changed rounding algorithm to match JC42.3
Rev 0.90a B. Gervasi 1/27/20
Changed coding for die per package for
consistency to old coding
Updated examples per new spreadsheet
Rev 0.90b B. Gervasi 1/28/20
Reconciled UDIMM and RDIMM module types between byte 3, base co
nfiguration, and
annexes, corrected some copy and paste errors in timing examples section
Rev 0.91 B. Gervasi 3/9/20 Fixed numbering of row and column encodings, bytes 5 and 9
Rev 0.92 B. Gervasi 3/17/20 Updated all examples per spreadsheet 3/11/20
Rev 0.92 B. Gervasi 4/27/20 Single CRC for blocks 0-7
Rev. 0.93 B. Gervasi 4/29/20 Changed SO-DIMM to SODIMM, 72b- to ECC
Document Formating Legend
Colors used in this Document and what they mean:
RED - All Red text is defined as something that is NEW
BLACK - Is considered the standard or the current Ballot.
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