Kinetis Microcontrollers中的主题 Re: Running KL16 @ 49MHz

Running KL16 @ 49MHz

ScottKerstein — Thu, 30 Mar 2017 21:29:32 GMT

Using the slow 32.7KHz Internal RC for clocking, and using FLL to boost core clock up to 47.98. In the specification, it states the max core clock is 48MHz, but when using IRC and FLL, there is up to 3% error in the clocking, resulting in a core clock of ~49MHz, which exceeds the max of 48MHz.

What are the adverse effects at running the KL16 @ 49MHz?

Thanks, in advance

Scott

Re: Running KL16 @ 49MHz

Jonathan_Iglesias — Mon, 03 Apr 2017 19:27:27 GMT

Dear Scott Kerstein,

I do not think that you will have problems with this, you may have problems if you exceed for more. but 1Mhz above is not a problem.

Best regards.

Jonathan

Re: Running KL16 @ 49MHz

ScottKerstein — Mon, 03 Apr 2017 19:35:43 GMT

Thanks. Is this documented?

Re: Running KL16 @ 49MHz

Jonathan_Iglesias — Mon, 03 Apr 2017 20:21:03 GMT

Dear Scott Kerstein, this ± 3% that you see may vary depending on the voltage and temperature so you will not have always a 3% error. if you are working on the range of 0-70°C and you have a fixed voltage your max error will be ±1.5%.

if you exceed the MCU specifications you will be more susceptible to fails.

All this information is in the Data sheet.

please check the MCG specifications and the 8.5 Result of exceeding a rating sections. for this information.

Have a great day !

Jonathan