LPC MicrocontrollersのトピックMax allowed function clock to MCAN module(s) in LPC5428

Max allowed function clock to MCAN module(s) in LPC5428

carstengroen — Fri, 07 Nov 2025 14:40:26 GMT

What is the maximum allowed clock to the MCAN module in the LPC54628 devices ?

I can't seem to locate the actual number in UM/DS, the samples from SDK shows often 220MHz/11 => 20 MHz, but interested in knowing what the max allowed clock is.

Re: Max allowed function clock to MCAN module(s) in LPC5428

Omar_Anguiano — Thu, 13 Nov 2025 21:42:34 GMT

In theory, the MCAN source clock supports higher frequency, it is limited by the mainclk.
MCAN functional clock for LPC546xx is 20 MHz, supports timing configurations for up to 5 Mbps data phase when using proper segment settings and prescalers. This limit is limited by the maximum supported CAN bit rate and protocol timings.

BR,
Omar

Re: Max allowed function clock to MCAN module(s) in LPC5428

carstengroen — Fri, 14 Nov 2025 06:49:59 GMT

@Omar_Anguiano many thanks for your answer. I see from the SDK samples that 20 MHz is selected in all of them, but I was not able to find a number in either the DS or UM.