NHD-0420CW-Ax3 I2C VDD level

tumbleweed

• March 14, 2018 18:01

Can the NHD-0420CW-Ax3 work with VDD=5V in I2C mode?

In the datasheet I2C interface section it states:
Supply Voltage for OLED and Logic
VDD = 2.8V for 2.8V operation ONLY, 5V mode not supported

Looking at the datasheet for the US2066 controller I don't see any such limit:
Section 10.5 I2C characteristics Ta=25degC, VDDIO = 2.4-3.6 / 4.5-5.5V, VSS =0V

The display datasheet seems pretty clear that it can't, but I was wondering what the limitation is.

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  Ted M.

  NHD Staff

  • March 15, 2018 09:35

  Please refer to this post for clarification on the issue of using I2C mode at 5v:

  https://support.newhavendisplay.com/hc/en-us/community/posts/10846682660247-Problem-with-NHD-0420CW-AY3-Display 

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