• State
  • Locked Locked
  • Replies 4 replies
  • Subscribers 79 subscribers
  • Views 489 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

MSP430F149: Ceramic resonator not working

MSP430FG6626: Ceramic Resonator Selection

Matt McConnell
Prodigy 150 points
Part Number: MSP430FG6626
Other Parts Discussed in Thread: EVM430-FR6043

I am implementing USB on the MSP430FG6626 and wish to use a ceramic resonator for XT2.  Application notes mention that TI commonly uses 4MHZ resonator for XT2 in EVM kits, but I cannot find example circuit and parts?  In particular, are the resistive components are required in parallel, and/or series with the resonator.  

  • 0
    TI__Mastermind 26046 points

    Hello Matt,

    Please check the Starting a USB Design Using MSP430 MCUs App Note, section 4.3 Selecting a Clock Configuration. It compares external clock sources, crystals, and ceramic resonators. Although ceramic resonators do not achieve the required tolerance, in mentions that some parts within the Murata CERALOCK® family can meet the required specifications.

    Section 6 of the CERALOCK datasheet shows the application circuits with an IC, so feel free to use that information from the vendor. 

  • 0 in reply to Aaron Barrera
    Prodigy 150 points

    Yes, I have reviewed cited references.  TI mentions using these devices in many of their EVM's, however I cannot not locate the pertinent schematics and BOMs.  In particular, what resistive components and final resonator part number are used in these EVM's?

  • 0 in reply to Matt McConnell
    TI__Mastermind 26046 points

    Hi Matt,

    Can you please share examples of where "TI commonly uses 4MHZ resonator for XT2 in EVM kits"? On the web pages, the EVM kits include the design files and BOMs in the downloadable tool folders.

    You may want to refer to the EVM430-FR6043, this one has an 8MHz resonator onboard (Y3). You can use the schematic to see an example of how to implement the ceramic resonator there.

  • 0 in reply to Matt McConnell
    TI__Mastermind 26046 points

    Hi Matt,

    Can you please share examples of where "TI commonly uses 4MHZ resonator for XT2 in EVM kits"? On the web pages, the EVM kits include the schematics and BOMs in the downloadable tool folders.

    You may want to refer to the EVM430-FR6043, this one has an 8MHz resonator onboard (Y3). You can use the schematic to see an example of how to implement the ceramic resonator there.

**Attention** This is a public forum