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VAR-SOM-DUAL MUX pin 16 Ethernet as GPIO

Posted: Mon May 22, 2017 11:20 am
by pierrelgcb
Hello,

Working with VAR_SOM_DUAL including Ethernet option (during development step).
I don't need ethernet so I use pin 16 as GPIO1[28] on a custom board. I can' t get 1 or 0 level. I get 2,9V and 0,8V with 3,3V supply.

There is nearly 13kohms between pin 16 and GND.

Can I use pin 16 as GPIO on VAR-SOM-DUAL ?

Regards,
Pierre

Re: VAR-SOM-DUAL MUX pin 16 Ethernet as GPIO

Posted: Wed May 31, 2017 12:30 pm
by pierrelgcb
Answer from support :
On SOM with Ethernet, the signal is connected to 3.3K and to the Ethernet PHY pin which has some internal pull as well.
In a module with a no Ethernet you will have just a 3.3K to 3.3V so you will be able to use it as GPIO.