Forum Rule: Always post complete source code & details to reproduce any issue!
Results 1 to 4 of 4

Thread: Does the Teensy 4.1 handle the PSRAM refresh time?

  1. #1

    Does the Teensy 4.1 handle the PSRAM refresh time?

    I think the P means it's actually DRAM and so it needs to be refreshed. If this is true, what happens if I try to access data during this refresh time?


  2. #2
    Senior Member PaulStoffregen's Avatar
    Join Date
    Nov 2012
    The DRAM refresh is all done internally and automatically inside the chip.

    Teensy doesn't do any refresh, and couldn't do it even if we wanted, because the PSRAM chip doesn't provide any commands or other mechanisms to control the internal refresh. It's all automatic inside the chip.

  3. #3
    Senior Member
    Join Date
    May 2015
    Looks like it refreshes in the short intervals where CE# is high between operations. If so, then nothing to worry about.

  4. #4
    Thanks to you both, my good buddies.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts