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TMS320F28335 32bit external memory design

Adrian Bostan
Prodigy 125 points

Hi, im developing a test board  for this DSC and im not sure if my desing is corect, i made some changes from the initial design sprc541

I wanna use a 32 bits external memory interface

Memory 1------>    DSC

A0......A17------>XA1.....XA18

D0.....D15------>XD0......XD15

CS---------------->XZCS6

WE---------------->XWE0

OE---------------->XRD

 

 

Memory 2------>    DSC

A0......A17------>XA1.....XA18

D0.....D15------>XD16......XD31

CS---------------->XZCS7

WE---------------->XA0

OE---------------->XRD

 

 

 

I atach my design

2022.PCB_Project2.pdf

  • 0
    TI__Guru* 93800 points

    Adrian Bostan said:

    I wanna use a 32 bits external memory interface

    Memory 1------>    DSC

    A0......A17------>XA1.....XA18

    D0.....D15------>XD0......XD15

    CS---------------->XZCS6

    WE---------------->XWE0

    OE---------------->XRD

     

     

    Memory 2------>    DSC

    A0......A17------>XA1.....XA18

    D0.....D15------>XD16......XD31

    CS---------------->XZCS7

    WE---------------->XA0

    OE---------------->XRD

     

    Adrian,

    The only thing I've noticed is you have the two memories on different zones.  Both memories should be connected to the same chip select signal - either XZCS7 or XZCS6. 

    -Lori