Config Baudrate for LPUART0 to 10 Mbaud, MK22FN128VLH10

[stephaniestollb]

Hi,

We want to config the LPUART of the MK22. We need a baudrate of 10 Mbaud.

As clock base we prefer to use the IRC48M. How to Config the MCG to get a higher Frequenz (80 Mhz)?

And how config the LPUART (SBR, OSR)?

[kerryzhou]

Hi Stephanie,

1. 10M baud rate configuration:

    From the reference manual of K22FN128VLH10, you can get that:

  Baud rate= LPCUART module clock/(SBR[12:0]*(OSR+1))

  If you choose the module clock = MCGFLLCLK =80Mhz, then you can get that:

SBR[12:0]*(OSR+1) = 80MHZ/10MHZ=8.

Then you can choose OSR=3, SBR=2;

2. As clock base we prefer to use the IRC48M. How to Config the MCG to get a higher Frequenz (80 Mhz)?

You can use the KDS Processor expert to configure it:

Wish it helps you!

If you still have question, please contact me~

Have a great day,

Jingjing

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