0

According to the Arduino pin Mapping 

20 PB12 SDA 3 6
21 PB13 SCL 3 6
70 PA17 SDA1 3 6
71 PA18 SCL2 15 9

The first one seems pretty obvious, the second one though is confusing. They have different labels. I also do not see other SDA or SCL in the table. So is this a typo?

dda
1,5951 gold badge12 silver badges17 bronze badges
asked Jan 10, 2020 at 19:49

1 Answer 1

1

According to the Wire library documentation https://forum.arduino.cc/index.php?topic=132130.0:

The Arduino Due has two I2C / TWI interfaces SDA1 and SCL1 are near to the AREF pin and the additional one is on pins 20 and 21.

And the table:

Arduino Due: 20 (SDA), 21 (SCL), SDA1, SCL1

So it seems in your table SCL2 should be SCL1.

answered Jan 10, 2020 at 19:59
2
  • 1
    It would seem that arduino has a typo in their documentation Commented Jan 10, 2020 at 20:42
  • Fully agree on that, note that my link is also from Arduino itself, and it's contradictory with your Arduino link. Probably you can write to them about it. Commented Jan 10, 2020 at 20:49

Your Answer

Draft saved
Draft discarded

Sign up or log in

Sign up using Google
Sign up using Email and Password

Post as a guest

Required, but never shown

Post as a guest

Required, but never shown

By clicking "Post Your Answer", you agree to our terms of service and acknowledge you have read our privacy policy.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.