4 Replies Latest reply on Aug 30, 2020 6:39 AM by DaEr_349131

    UART (scb) pin/drive type

    DaEr_349131

      Hi,

       

      When using UART (scb mode), the most use case is that one would use the built-in pull-up on the TX-line (not adding an external pull-resistor).

       

      Questions:

       

      - What is the pin/drive type for the UART TX pin?

      - Can this be changed?

       

      - Use case is to connect two UART's in parallel (software knows when it's ok to send).

        Would it be safe to just tie them together or should I wire the TX coming from "CPU 2" to an input of "CPU 1" to achieve a buffer, and also the option of adding a simple logic block that checks if uart_tx on "CPU 1" is driving, thus disabling incoming TX, not passing it through.