topic Re: Hi in Kinetis Microcontrollers

Hi

kirankumars — Thu, 16 Jul 2015 12:32:52 GMT

1)i am using TRK-KEA128 board can you tell how to configure bus clock for 16M. I am using internal oscillator right no it is 20M.

2)How to calculate the CAN baud rate for 125K with bus clock of 20M and also for 16M..?

david_diaz — Mon, 20 Jul 2015 16:40:52 GMT

Hello,

I am afraid that 20 MHz is the closest bus frequency value you can get using the internal oscillator.

In case you need to get 16 MHz bus frequency, I recommend using an external oscillator.

The KEA128 supports 32.768 kHz crystal or 4 MHz to 24 MHz crystal or ceramic resonator.

Regarding the CAN bit rate, please refer to the Clock system at chapter 32.4.5.2 from the Reference Manual at the following link:

Hope this information will be useful for you.

Have a great day.

David

egoodii — Mon, 20 Jul 2015 16:54:16 GMT

It is not possible to get any derivation from the internal clock to be accurate enough to enable proper CAN bit tolerance.