topic K64 (MK64FN1M0VLL12) debuger/programmer header connection in Kinetis Microcontrollers

K64 (MK64FN1M0VLL12) debuger/programmer header connection

fzhang — Thu, 30 Jun 2016 14:25:30 GMT

Planning to use the UMulitlink for debugger probe on my K64 board.

Here is the schematics following the K64 Tower board.

But on the document below:

The 20-pin connector is showing like:

My question is

pin 9 is ground on the probe definition but on the tower board schematic is left going nowhere. Do I have to ground pin 9? or it doesn't matter.

Thanks.

fzhang — Thu, 30 Jun 2016 19:48:01 GMT

It seems like doesn't matter per reference manual:

Robin_Shen — Wed, 06 Jul 2016 04:11:32 GMT

Hi Fubin,

It doesn't matter. You can left it floating.

PTA4 is default as NMI_b/EZP_CS_b function.

If you don't need EzPort and Non-maskable Interrupt function, an external 4.7 kΩ to 10 kΩ pullup is recommended.

Or you can disable these function by using FOPT[NMI_DIS] bit and FOPT[EZPORT_DIS] bit.

Best Regards,

Robin

fzhang — Wed, 06 Jul 2016 15:13:53 GMT

Robin,

Thank you for the confirmation. We will get the board made soon after the layout.