topic Re: MK64FN1M0VMD12 tri-state in Kinetis Microcontrollers

MK64FN1M0VMD12 tri-state

larsarntz — Tue, 16 Jun 2015 12:30:16 GMT

If I hold the Kinetis MK64FN1M0VMD12 in reset, will the processor go in tri-state mode/high impedance? I couldn't find this in the datasheet (I might have missed it)

Thanks in advance!

Re: MK64FN1M0VMD12 tri-state

egoodii — Tue, 16 Jun 2015 15:56:38 GMT

From K64P144M120SF5RM.pdf:

55.2.6, the definition for Port Data Direction Registers (GPIOx_PDDR) shows all reset to 'all zero', so that defines all GPIO-mode-pins as 'input' (high impedance).

The next question is 'which pins are GPIO at reset', and for that we jump over to table 10-2, and more particularly 10.3.1 'default' column, to see that 'most port pins' default to the analog-input modes, crystal, or disabled (ALT0). So, NOT GPIO, but high-impedance nonetheless.

Re: MK64FN1M0VMD12 tri-state

egoodii — Wed, 17 Jun 2015 20:35:22 GMT

Are you expecting more information?

Re: MK64FN1M0VMD12 tri-state

adriancano — Thu, 18 Jun 2015 01:03:15 GMT

Hi,

During the reset, besides of JTAG pins, EzPort pins, power pins and external oscillator pins are enabled, other pins are high-impedance(disable).

Hope this information can help you

Best Regards,
Adrian Sanchez Cano
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