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MSP430FR5849: MSP430FR5849 replace MSP430FR5859

Part Number: MSP430FR5849
Other Parts Discussed in Thread: MSP430FR5859


Good Day.

Customer is currently using a 32.768Khz external crystal with the MSP430FR5849, but he can only source the MSP430FR5859. He assume if he use the MSP430FR5859, he will need to replace the external crystal to a 4MHz crystal. Other than this, should he expect any change in functionality if he use the same code?

Please advise. Thank you very much.

Best Regards,

Ray Vincent

  • Hi 

    LFXT is only in FR584x and HFXT is only in FR585x. It is the difference between these two devices. RTC-B module is not support on FR585x device with HFXT only. If the low frequency is not for RTC usage, both devices have an internal VLO clock which is around 10KHz. If you want use a lower clock to reduce the power consumption you can use this low power clock.

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