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Use EMIF2 on F28377D for HPI

Michael Pumberger
Prodigy 180 points

Hello guys,

I was just checking out the datasheet of the F28377D, looking for the right connection EMIF <==> HPI to a C6747, but I am not able to find some signals at the EMIF2 interface (which are present on the EMIF1):

- EM2OE
- EM2WAIT
- EM2CSn

are missing, so my question is, why are this signals missing, and is it possible to use this EMIF as a HPI master?

My connection would look like this currently:

- HCNTL[1:0] <==> EM2A[2:1]
- HR/W <==> EM2RNW
- HHWIL <==> EM2A[0]
- HAS <==> Logic High
- HDS1 <==> EM2WE
- HD[15:0] <==> EM2D[15:0]

But what about:

- HCS <==> should be EM2CSn
- HDS2 <==> should be EM2OE
- HRDY <==> should be EM2WAIT

Where may I connect them to? Especially the WAIT signal looks like an important signal to me.

Also, can you give me a hint, how to configure the EMIF correctly, because there is no example project and the reference manual does not state any information about HPI through the EMIF.

BR,
Michael

  • 0
    TI__Guru** 117001 points

    Hi Michael,

    The missing singnals of EMIF2 in datasheet is an error and we'll be correcting this in next datasheet release.

    Following is the mapping of missing signals.

    - EM2OE      <-> GPIO121
    - EM2WAIT  <-> GPIO110
    - EM2CSn    <-> GPIO116

    All of these are in same GPIOMUX group ("3") as other EMIF2 signals.

    Regarding HPI mode of EMIF, as of today, this is not supported on F28377D device hence this is not documented in TRM.

    Regards,

    Vivek Singh

     

  • 0 in reply to Vivek Singh
    Prodigy 180 points

    Thank you for the mapping of the signals.

    What do you mean with "not supported"? Do you mean "Not possible", or "not documented yet"?

    We currently use a F28335 as HPI master over the Xternal Interface and it may be replaced by the F28377D, so how to deal with this HPI issue here? We definitly need HPI or the F28377D would be a no-go.

    I cannot believe, you design a successor for the single core C2000 with less functionality at this point.

    br
    Michael

  • 0 in reply to Michael Pumberger
    Prodigy 180 points

    Could you provide more information on this HPI over EMIF topic, because this is very urgent for me.

    BR,
    Michael