topic Re: In Kinetis K27, does PORTE support high-drive mode? in Kinetis Microcontrollers

In Kinetis K27, does PORTE support high-drive mode?

masahirokiniwa — Mon, 15 Jan 2018 04:36:48 GMT

Hi,

Could you tell me can I use IO group 4(PORTE) for high-drive pins?

In its data sheet, IO group 3 and 4 look like high-drive pins, however reference manual is written that only eight GPIOs in IO group 3 are supporting high-drive mode.

Which is the correct definition?

Best regards,

M.Kiniwa

Re: In Kinetis K27, does PORTE support high-drive mode?

Robin_Shen — Wed, 17 Jan 2018 08:51:59 GMT

Hi Masahiro,

Please download the latest version Data Sheet and Reference Manual.

PTB0, PTB1, PTC3, PTC4, PTD6, and PTD7 I/O have both high drive and normal drive capability selected by the associated PTx_PCRn[DSE] control bit. All other GPIOs are normal drive only.

PORTE does not suppor thigh-drive mode.

Best Regards,

Robin

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Re: In Kinetis K27, does PORTE support high-drive mode?

masahirokiniwa — Thu, 18 Jan 2018 02:57:08 GMT

HI Robin,

Thank you for your answer.

But I use K27.(not KL27), and I confirmed K27 data sheet and reference manual as below.

https://www.nxp.com/docs/en/data-sheet/K27P169M150SF5V2.pdf

https://www.nxp.com/docs/en/reference-manual/K27P169M150SF5RM.pdf

Could you re-confirm it?

Best regards,

M.Kiniwa

Re: In Kinetis K27, does PORTE support high-drive mode?

Robin_Shen — Thu, 18 Jan 2018 08:11:21 GMT

Sorry for my last reply.
I have report it to internal team. And I will inform you as soon as I get any feedback.

Best Regards,

Robin

Re: In Kinetis K27, does PORTE support high-drive mode?

Robin_Shen — Mon, 22 Jan 2018 01:41:34 GMT

In Kinetis K27, PORTE support high-drive mode.

According to chapter "11.2.1 Port control and interrupt module features" of K27 Reference manual , you can find the correct information.

Best Regards,

Robin

Re: In Kinetis K27, does PORTE support high-drive mode?

masahirokiniwa — Tue, 23 Jan 2018 02:22:53 GMT

Hi Robin,

Thank you for your reply.

I confirmed the Table 11-2 in K27 reference manual and I see that Port C supporting drive strength control.

However I got an additional question about drive strength control of Port C.

In this table, PTC3, 4 and 24 to 29 support drive strength enable control, but PTC 24 to 29 are assigned IO group 2 as below.

And IO group 2 looks like they don't support high drive strength.

If PTC24 to 29 supported high drive strength, could tell me their drive current?

Best regards,

M.Kiniwa

Re: In Kinetis K27, does PORTE support high-drive mode?

Robin_Shen — Thu, 01 Feb 2018 08:51:49 GMT

See the feedback below:

So, Design did confirm that Port E and PTC24-29 do support high-drive. There was some confusion as these pins use a slightly different pad cell than the other PTB0,PTB1,PTC3,PTC4, PTD4-7. I am already addressing the discrepancies found within the RM and DS and submitting the changes to the Tech Docs team.

In summary, Table 11-2 is correct regarding the high drive functionality.