• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 98 subscribers
  • Views 371 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

About restriction of RDCYCLETIME in GPMC of AM335x

RY9983
Guru 10570 points

Hello.
There is a description about restriction of RDCYCLETIME on TRM spruh73g(P279) :

7.1.3.3.9.8.1 Access Time on Read Access
GPMC_CONFIG5_i[4-0] RDCYCLETIME must be greater than RDACCESSTIME
in order to let the GPMC latch the last return data using the internally retimed GPMC_CLK.

Is it applied for asynchronous read mode?
Because, since it seems to be for only synchronous read mode, I would like to confirm it.

Best regards, RY

  • 0
    TI__Guru**** 393215 points
    Hi RY,
     
    The whole paragraph is this:
     
    "GPMC_CLK which is sent to the memory device for synchronization with the GPMC controller, is internally retimed to correctly latch the returned data. PMC_CONFIG5_i[4-0] RDCYCLETIME must be greater than RDACCESSTIME in order to let the GPMC latch the last return data using the internally retimed GPMC_CLK."
     
    GPMC_CLK is sent to synchronous memories only.