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TMS320F28388D: EtherCAT + External memory interface; pin reassignment

Tim De Bondt
Prodigy 130 points
Part Number: TMS320F28388D
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Hello,

I want to use the F28388SPTPS and I want to connect both an EtherCAT module and an external memory (DRAM). For this both ESC_PHY_RESETn and EMIF1_D8 are on pin 143. I was wondering if I could remap the ESC_PHY_RESETn to another GPIO pin (not used in my code (only at init)). I could also pull it up with a resistor, but for future proofing I would like to have it connected to a GPIO. 

Greetings,

Tim

  • 0
    TI__Mastermind 45606 points

    Hi Tim,

    Sorry for the delay.

    It seems there are more pins that overlap between EMIF and eCAT than just ESC_PHY_RESETn signal when checking quickly with sysconfig pinmux tool. Unless you altered which EMIF signals you are using in some way.

    A common way to move signals to other pins is using both INPUT and OUTPUT X-BARs. If you can connect the ESC_PHY_RESETn signal from an un-bonded GPIO (like 155 or 76 missing on 176-pin package) to the INPUT X-BAR and then out to another pin using the OUTPUT X-BAR then that may work.

    Best,

    Kevin