topic Re: MKW30Z Oscillators in Kinetis Microcontrollers

MKW30Z Oscillators

michaelperreca — Fri, 13 Jan 2017 14:41:56 GMT

Hello All,

I'm in the process of bringing up an MKW30Z and doing the hardware checkout. One of the things I like to do with any hardware is confirm that the clocks and voltages are working as needed before I give the board to my programmers. While all my voltages check out, my clocks don't seem to work. I've used the same crystals as the freedom board so I know the crystal is sufficient and even tried adjusting the load capacitors. I'm not a software guy but reading the development guide, it appears you can turn on and off the clocks. Should a new, blank chip, start the oscillators on power-up with the RESET (PTA2) line held high? Or do I have to wait for the software guys to get in there an enable the clocks in code through JLINK?

Thanks.

Re: MKW30Z Oscillators

jorge_a_vazquez — Mon, 16 Jan 2017 21:51:57 GMT

Hi Michael Perreca

Yes OSC module need to be enable. The OSC module in conjunction with an external crystal will generates reference clock. In this case you will see a wave with noise in your out if this module hasn't been enabled by software, it need a time to start-up and stabilized.

Hope this information helps you
Have a great day,
Jorge Alcala

Re: MKW30Z Oscillators

michaelperreca — Thu, 26 Jan 2017 21:04:38 GMT

Once I hooked up the JTAG device and inserted code, everything fired up as it should. Thanks for the help