I want to know, does the KL26 MCU support 'USB clock recovery' when using the IRC? I havn't find the information in 'KL26P121M48SF4RM'.
If supported, please give me the corresponding documents or example code projects that would accelerate the development.
Thanks.
Hi
The KL26 doesn't have IRC48M and so doesn't support crystal-less USB device.
The KL27 is needed instead.
Regards
Mark
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Dear Mark,
Thanks for your reply.
I have another question about this.
In the spec of KL26 chapter 3.8.1, there is a note says " The MCGFLLCLK does not meet the USB jitter
specifications for certification. ". Is there a method to ensure the MCGFLLCLK meets the USB jitter spec for certification when using the IRC?
Hi
The only way to ensure reliable USB operation and fulfill certification requirements is to use a crystal/oscillator source for the external clock or on the dedicated USB clock input.
It is impossible with MCGFFLCLK.
Regards
Mark
OK.
It's clear about the question. Thanks.