NHD-0420CW-AY3 and 2.8 V Power Supply

hodoe

• April 26, 2021 22:35

Hello, I had asked here before about the correct wiring of the 5 V power supply.

But what about 2.8 V? I find the data sheet confusing and do not want to break anything. To which pins do I connect the 2.8 V and do I still need a special code for this?

Thanks in advance

Holger

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  Zach P

  NHD Staff

  • April 28, 2021 10:54

  Hi Holger,
  
  When using 2.8V for your Vdd, the REGVdd pin needs to be 0V (Grounded) for proper functionality. Wiring pinouts will be the exact same as when using 5V elsewhere. For the code just make sure to disable the internal Vdd regulator after function selection A (Command (0x71);. On page 21 of the datasheet an example Initialization Sequence is given to provide visual help.
  
  NHD-0420CW-AY3 Datasheet: https://www.newhavendisplay.com/specs/NHD-0420CW-AY3.pdf
  
  Hope this helps!
  
  ZP

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