ECC algorithm of DDR SDRAM

[yansongzhu]

What is the ECC algorithm of DDR SDRAM on P2020 platform? It seems not the normal Hamming code.

[ufedor · Accepted solution]

The ECC is a (72,64) Hsiao odd-weight-column code which is modified(shortened) (127,120) Hamming code - refer to the following document (Figure 3, (c)):

https://pdfs.semanticscholar.org/dd97/ac9c9d9267793054aa38782f03342e4ccb32.pdf