MSP430FR2475: which crystal used for test?

Expert 2411 points

Part Number: MSP430FR2475

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,

5 months ago

+1 Xiaodong LI 5 months ago

TI__Mastermind 21535 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 GR 5 months ago in reply to Xiaodong LI

Expert 2411 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,

+1 Xiaodong LI 5 months ago in reply to GR

TI__Mastermind 21535 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 GR 5 months ago in reply to Xiaodong LI

Expert 2411 points

Hi LI

Thanks for your information.

I understand it.

Best regards,

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MSP430FR2475: which crystal used for test?