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CC3220S: Pin Unavailablity

Collin P
Prodigy 141 points
Part Number: CC3220S
Other Parts Discussed in Thread: CC3200, SYSCONFIG

According to the CC3220S datasheet, pin 1 can be used as UART1_TX and pin2 can be used as UART1_RX. however, in my *.syscfg file I am not able to select pin 1 for TX or pin 2 for RX. THe diagram says the pins are available and I am not using them form anything else. Am I missing something? I need to use those pins to match our hardware design; we are upgrading from a CC3200 and those pins work fine for the CC3200 and should for the CC3220S as well.

  • 0
    TI__Mastermind 38980 points

    Hi Collin,

    I see pin 2 in your UART RX drop-down, it's labeled "P02/10 (LaunchPad I2C)". This corresponds to the LaunchPad layout (header 10 on the LaunchPad and tied to the on-board I2C sensors).

    By default, the SysConfig metadata is tied to the LaunchPad hardware limitations. To open up all options for the device, there should be a "Use Custom Board" button in that SysConfig menu on the right.

    Best regards,

    Sarah

  • 0 in reply to Sarah P
    Prodigy 141 points

    Thank you for the input, you are right on the I2C portion. I figured out the part that was messing me up. The wording of the drop down is inverted to what I had thought.
    I thought...
    P08 was the MCU Pin 8, and 18 was the header labeled P18. It must have been a longer week than I had realized...
    Turns out P08 meant P08 on the MCU and the header labeled P08, which is the 18th pin in this arrangement...