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PocketBeagle floating inputs should have RX disabled #201

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jadonk opened this issue Apr 6, 2019 · 2 comments
Open

PocketBeagle floating inputs should have RX disabled #201

jadonk opened this issue Apr 6, 2019 · 2 comments
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@jadonk
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jadonk commented Apr 6, 2019

The pinmux for P1.2 and P2.35 should be set to RX disabled for the case where an analog input is provided on those pins floating between 0V and 3.3V. Otherwise, there is extra I/O cell leakage.

http://processors.wiki.ti.com/index.php/AM335x_Schematic_Checklist
@jadonk jadonk self-assigned this Apr 6, 2019
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pdp7 commented Jun 9, 2020

@jadonk do you mean disabled by kernel driver?

@pdp7 pdp7 added the pocket PocketBeagle label Jun 10, 2020
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pdp7 commented Jul 8, 2020

@jadonk I think you mean setting the mux mode to have RX disabled in the device tree
Per the cape header pins sheet, I believe P1.02 / AIN6 / GPIO87 is:

  • mode0: lcd hsync
  • mode7: gpio 2.23

and P2.35 / AIN5 / GPIO86 is:

  • mode0: lcd vsync
  • mode7: gpio 2.22

Does that look right?

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