Go Down

Topic: UNO Ethernet Reserved Pins (Read 762 times) previous topic - next topic


I wasn't sure where to post this, so I hope this works.

I've got an UNO Ethernet, and I know that pins 10-13 are reserved and can't be used for I/O, but what about pin 4?

Pin 4 is reserved for the SD card... but what if I don't want to use the SD card?  Can I use pin 4 for I/O?

I can't seem to find anything telling me that I can't use pin 4. 

Anyone know?


You can use pin 4 for I/O if there is no SD in the socket.  Pin 4 is only connected to the high-Z input of a level shifter IC. 

Go Up

Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

via Egeo 16
Torino, 10131