GPIO pins 29, 31, 33 connection on Radxa Zero

#1

Hi there,

while looking for a way to use this https://github.com/nabaztag2018/hardware card (a nabaztag revival card), I noticed pins 29, 31, 33 are marked as NC. Does NC stands for Not Connected or Not Communicated ? In the later case, does anyone know how to access this pin ?

Thanks in advance for your guidance.

Benoît

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#2

NC means Not Connected/No Connection. The pins are not connected to anything and have no purpose.

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#3

Thanks for this answer but having a further look at the schematics here https://dl.radxa.com/zero/docs/hw/RADAX_ZERO_V13_SCH_20210309.pdf it looks like theses pins are routed to GPIOA0-[567].

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Unfortunately, my board is revision 1.4 and the schematics is for rev 1.3.

#4

You cannot control pin 29/31/33 (GPIOAO-[5/6/7] ), marked NC, since these three pins are used for other hardware circuit.