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TMS570LC4357: TMS570LC4357 Conflict Pins

Ray Vincent Aranzaso
Mastermind 18180 points

Part Number: TMS570LC4357

Hi,

Good Day. I have a customer is working with TMS570LC4357. Please see below the query of the customer for your reference. Thank you very much.

"I would like to know if it can be possible to have a pin conflict for example configuring J3 and H4 both as GPIO."

Best Regards,

Ray Vincent

  • 0
    TI__Guru**** 199746 points

    Hi Ray,

    If H4 is configured to be a N2HET pin, and J3 a MibSPI1CS3, you can use those two terminals (J3, H4) as two separate GIO pins. 

  • 0 in reply to QJ Wang
    TI__Mastermind 18180 points

    Hi QJ,

    Good Day. Please see below the response of our customer to your reply. Thank you very much.

    "Sorry I did not understand. I need to configure these pins as GIO. Do you mean that I can configure as GIO also if N2HET and MIBSPI1CS3?

    Best Regards,

    Ray Vincent

  • 0 in reply to Ray Vincent Aranzaso
    TI__Guru**** 199746 points

    Hi Ray,

    Yes, both N2HET1[21] (H4) and MibSPI1CS[3] (J3) can be used as GIO pins. To use MibSPI1CS[3] as GIO pin, you needs to configure SPIPC0 and other SPIPCx registers properly.

    If bother H4 and J3 are configured to be N2HET1[21], the H4 and J3 pins have the same output. But the GIO gets input only from one of H4 or J3 (configured through input pinmux).

    PINMMR92[16] = 1, PINMMR92[17] =0,  ---> H4 is selected for input

    PINMMR92[16] = 0, PINMMR92[17] =1,  ---> J3 is selected for input