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MSP430FR2475: which crystal used for test?

GR
Expert 2311 points
Part Number: MSP430FR2475

Hi

May I have question about MSP430 MFCLK test condition?

I want to know which crystal used for  8.12.3.2 DCO FLL, Frequency test?

I find suggested crystal in this document, but I can not find which used for DS test.

MSP430 32-kHz Crystal Oscillators (Rev. D)
https://www.ti.com/lit/an/slaa322d/slaa322d.pdf

Thanks,

GR

  • +1
    TI__Mastermind 21475 points

    Hi GR

    Yes. The MSP430 32-kHz Crystal Oscillators (Rev. D) is the correct document on 32KHz crystal selection.

    Please check 2 Crystal Selection chaptor and Table 3. Safety Factor Test Results on this document

    I think anyone part number on this table should be OK.

    or another part number and vendors following the 2 Crystal Selection chaptor should be OK

    Thanks

  • 0 in reply to Xiaodong LI
    Expert 2311 points

    Hi Li,

    Thanks for your information.

    I would like to know the error condition of external crystal where the error of MFCLK is ±0.5% maximum.
    Is it correct to recognize the error of ±0.5% maximum with 30ppm precision crystal which is presented in the common crystal of "32 kHz crystal oscillator (Rev. D)"?

    Best regards,

    GR

  • +1 in reply to GR
    TI__Mastermind 21475 points

    Hi GD

    ±0.5% error is FLL based on the external crystal.

    30ppm error on crystal (room temperature) which is 3/100000 is much smaller than 0.5%.

    I think the error from crystal has been included inside of ±0.5%

    Thanks

  • 0 in reply to Xiaodong LI
    Expert 2311 points

    Hi LI

    Thanks for your information.

    I understand it.

    Best regards,

    GR

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