Default Configuration of UART Pins in USB-Serial Devices - KBA229765

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    Version: **

     

    Translation - Japanese: USBシリアルデバイスのUARTピンのデフォルト設定 - KBA229765 - Community Translated (JA)

     

    Question: What is the default configuration of UART pins in USB-Serial devices?

     

    Answer:

    The following is the default configuration of UART pins in USB-Serial devices:

    • Rx, which is an input is left floating for the other communicating peer to drive the pin.
    • RTS, DTR, and Tx are output pins, and strong drive high (VCCIO/VDDD).
    • DSR and CTS are inputs, with default configuration of Active Low, pulled up to VCCIO.

     

    Note: In CY7C65213 the polarities of the UART pins (DCD, RI, RTS, CTS, DTR, and DSR) can be inverted using the USB-Serial Configuration Utility.