• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 99 subscribers
  • Views 436 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.

EMIF16

Eric Eiben
Prodigy 10 points

1.  The initial set of timing diagrams (Figure 2-4 and Figure 2-5) do NOT represent a mode of operation, they are just a set of generic timing diagrams.  Correct?  There are only two modes of operation, Select Strobe and WE modes. 

2.  The Async Config Registers (A1CR - A4CR) have a reset value of 0x0 for the SS mode bit field, disabling the Select Strobe mode.  Since the WE strobe mode is the default mode for only CE3 (page 2-3), do the other CEs default to a different mode or are they just inactive?  Also, how does the WE strobe mode get enabled for CE3?  

3.  Reiterating what I thought I read in a previous thread, all four CEs can be used to access NOR Flash - correct?

  • 0
    TI__Expert 6815 points

    1.  The initial set of timing diagrams (Figure 2-4 and Figure 2-5) do NOT represent a mode of operation, they are just a set of generic timing diagrams.  Correct?  There are only two modes of operation, Select Strobe and WE modes. 

    [AK]: No, if SS mode and WE strobe mode are not used, these represent the default asynchronous operating mode. SS and WE strobe modes can be considered to be special cases.

    2.  The Async Config Registers (A1CR - A4CR) have a reset value of 0x0 for the SS mode bit field, disabling the Select Strobe mode.  Since the WE strobe mode is the default mode for only CE3 (page 2-3), do the other CEs default to a different mode or are they just inactive?  Also, how does the WE strobe mode get enabled for CE3?  

    [AK]: By default, CE0-CE2 operate in the default async operating mode. SS mode can be enabled for CE0-CE2 by software. WE strobe mode is not supported on CE0-CE2.

    CE3 defaults to WE strobe mode. it does not support default async mode. You can however override WE strobe mode by enabling SS mode for CE3.

    3.  Reiterating what I thought I read in a previous thread, all four CEs can be used to access NOR Flash - correct?

    [AK]: That is correct.