topic Re: Input CLK for CAN on LPC5536 in LPC Microcontrollers

Input CLK for CAN on LPC5536

ja_lpc — Thu, 19 Oct 2023 12:30:56 GMT

Currently working on LPC5536uC for one product.

Through the Zephyr LPC5536 was getting configured to internal 96MHZ FRO.

But with the help of clock and pin tool on MCUXpress IDE I made changes to use the external clk via PLL and drive the main clock to 150MHz.

I see in the config tool that by default the CANCLKDIV value is 1 and hence CAN will endup getting fed with 150MHz in my case.

But for a 1Mbps on CAN, how much should be the CAN clock so that I can set the divider accordingly?

Alice_Yang — Mon, 23 Oct 2023 07:30:53 GMT

You can directly config baud rate on configuration tool as below:

Alice

ja_lpc — Mon, 23 Oct 2023 07:49:13 GMT

Would this mean, we don't have to adjust the input frequency?

Alice_Yang — Wed, 25 Oct 2023 08:15:49 GMT

" adjust the input frequency?"

->> Please describe it more detail.

Alice

ja_lpc — Fri, 27 Oct 2023 11:12:47 GMT

The input frequency to the CAN

Alice_Yang — Mon, 30 Oct 2023 07:16:42 GMT

You can choose clock source for CAN, then use CANCLKDIV to get Baud rate. About detail recommend refer to CAN demo under SDK, and

config tool.

Alice