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MSP 432 & USB

Gary Chen18
Prodigy 50 points

I am new to MSP 432 family and this forum. 

Tried to find application notes or User Guide in regards to the implementation of USB port with UART port on MSP 432 without any luck.

Any suggestions or comments will be greatly appreciated!

  • 0
    Guru 303850 points
    At the moment, there is no MSP432 with built-in USB support.

    The UART signals are plain standard UART signals (often called "TTL", although they aren't); you can use any random USB/UART converter chip or adapter.
  • 0 in reply to Clemens Ladisch
    Prodigy 50 points
    Thanks for your comment. There are many converter chips. Found one "FT234XD" that seems to be able to do the job. Since it is 3.3 v on both sides, my understanding is that it can be used directly without the level shifting to RS232. Correct?
  • 0 in reply to Gary Chen18
    Guru 74080 points

    Gary Chen18 said:
    level shifting to RS232

    When using the FT23x (most used part might be the FT232), the signal's voltage has nothing to do with RS232 leves. On the microcontroller side you normally have 3.3V UART when using a MSP430. The "PC side" is somehow "don't care" for you. The IC will handle all communication betwenn PC<->MSP.

    Dennis

  • 0 in reply to Dennis Eichmann
    Prodigy 50 points
    Thanks for your comments, which confirms my understanding, i.e., it can be connected directly to MSP432.

    The difference between FT232 and 234 seems to be only FT232 does not use the 27 ohm resistors at the USB side; however, FT232 is bigger and comes with 28 pins compared to 12 pins for FT234. Any other differences of significance?

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