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Is DM643x DDR2SDRAM controller supported "Posted CAS" ?

rs3301
Intellectual 270 points

Hello,

I have one quetion.

Is DM643x's DDR2SDRAM controller supported "Posted CAS"?

 

  • 0
    TI__Mastermind 41665 points

    rs said:
    Is DM643x's DDR2SDRAM controller supported "Posted CAS"?

    I am not really an expert on DDR2 specifically, so if someone can find a more conclusive answer by all means correct me, however my impression is that the DM643x DDR controller does not support 'posted CAS' based on the description from here. I say so because the DDR2 user's guide here mentions that the additive latency is always set to 0 for reads.

  • 0 in reply to Bernie Thompson TI
    Intellectual 270 points

    Thank you for your reply.

    I understood like that,

    "posted CAS" required "additive latency"

    But according to spru986b page 17, DM643x's DDR memory controller does not support (always zero) "additive latency".

    Thank you very much.