Kinetis Microcontrollers中的主题 Re: frdm-kw40z component couldn't detect

frdm-kw40z component couldn't detect

shinezen — Fri, 29 Jul 2016 11:15:23 GMT

I change component MK20DX128VFM5 and kw40z from frdm-kw40z. and then my computer couldn't detect frdm-kw40z.

how can i do to solution this problem?

thanks

vicentegomez — Mon, 01 Aug 2016 16:15:41 GMT

First, why did you change the two MCUs? Was damaged? is there any other device damage?

The K20 has the Open SDA, did you load the firmware on it?

You need it to program the KW40

regards

Vicente Gomez

shinezen — Tue, 02 Aug 2016 02:05:35 GMT

i base on frdm-kw40z to design the board. i found out k20 no Oscillator and no usb_dp usb_dn when i connect computer by usb port.

vicentegomez — Tue, 02 Aug 2016 16:10:59 GMT

Sorry I did not understand

You create you own design based on the freedom?

shinezen — Wed, 03 Aug 2016 06:10:32 GMT

No, i would like to make board , just like frdm-kw40z + Charging circuit.

and then MK20DX128VFM5 can not work. so i check power is ok but Oscillator pin no work .

1.i would like to know how to programming MK20DX128VFM5 ?

2. New component (MK20DX128VFM5) could programming by usb port?

thanks for your help

vicentegomez — Wed, 03 Aug 2016 15:26:26 GMT

To program the K20 you need a j-link or o SDA

Please check the KQRUG

Regards

Vicente Gomez