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francescatodiego2
Visitor II
August 12, 2005
Question

Upsd33xx power supply

  • August 12, 2005
  • 2 replies
  • 701 views
Posted on August 12, 2005 at 14:56

Upsd33xx power supply

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    2 replies

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    francescatodiego2Author
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 12:06

    I am working with uPSD32xx (5V model) and I plan to migrate to uPSD33xx but I have a problem:

    5V supply is only for PSD, microcontroller work with 3.3V, is true ?

    If yes, I must work with microcontroller bus at 3.3V and external peripheral chip select from port B at 5V ?

    Demo board DK3300-ELCD work with PSD3.3V or PSD 5V?

    thanks for help

    G
    gbillard9
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 12:06

    Yes, uPSD core is 3.3 V

    If you work with external peripheral port at 5V you have to route the pin of the bus on a PSD port and to adapt the level of rd/ an wr/. The second solution is to find a componant to adapt the 3.3V bus to 5V

    Demo board DK3300 work with 3.3V for MCU

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