What is the highest flow control baud rate by S32KXX?

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What is the highest flow control baud rate by S32KXX?

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Contributor III

What is the highest flow control baud rate by S32KXX?

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1 Solution
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NXP TechSupport

Hi 建宽高,

According Baud rate generation section from Reference Manual, Baud rate can be calculated as:

Baud Rate = LPUART ASYNCH Module Clock / (SBR * (OSR + 1))

Minimum value for OSR is 3 and SBR is 1, so, Maximum Baud rate can be simplified  to:

Max Baud Rate = LPUART ASYNCH Module Clock / (1*4) = LPUART ASYNCH Module Clock / 4.

LPUART can use clock from SPLLDIV2_CLK, FIRCDIV2_CLK, SIRCDIV2_CLK, SOSCDIV2_CLK.

The maximum frequencies of those *DIV2_CLKs are specified as below in the RM.

Thus:

Max Baud Rate = 48 MHz / 4 = 12 Mbps (RUN mode)

Max Baud Rate = 56 MHz / 4 = 14 Mbps (HSRUN mode)

Best Regards,

Robin

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2 Replies
551 Views
Contributor III

you are so cool

552 Views
NXP TechSupport

Hi 建宽高,

According Baud rate generation section from Reference Manual, Baud rate can be calculated as:

Baud Rate = LPUART ASYNCH Module Clock / (SBR * (OSR + 1))

Minimum value for OSR is 3 and SBR is 1, so, Maximum Baud rate can be simplified  to:

Max Baud Rate = LPUART ASYNCH Module Clock / (1*4) = LPUART ASYNCH Module Clock / 4.

LPUART can use clock from SPLLDIV2_CLK, FIRCDIV2_CLK, SIRCDIV2_CLK, SOSCDIV2_CLK.

The maximum frequencies of those *DIV2_CLKs are specified as below in the RM.

Thus:

Max Baud Rate = 48 MHz / 4 = 12 Mbps (RUN mode)

Max Baud Rate = 56 MHz / 4 = 14 Mbps (HSRUN mode)

Best Regards,

Robin

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