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TMS320F28075: Use of GPIO72

Howard Zou
Genius 12365 points

Part Number: TMS320F28075

Hi,

GPIO72 is the default boot pin.

Since we need GET MODE so GPIO72 need to be high.

And we are also using GPIO72 as /SPISTEC in our application software and we will pull it low.

So in hardware we pull up GPIO72 to 3.3V through 4.7k pull up resistor.

So in theory it's high when the device is powered up, and then we can pull it low by software when using SPI.

Are there any risk of this configuration?

  • 0
    TI__Guru** 117281 points

    Hi Zou,

    I don't see any issue with this but please note that user can change the BOOTMODE mode pin to avoid such conflict by programming Z1OTP_BOOTCTRL/Z2OTP_BOOTCTRL location in USER OTP, if needed.

    Please refer section "Configuring Boot Mode Pins" of TRM for more detail on this.

    Regards,

    Vivek Singh