Author Topic: NHD-0420DZW-AY5 to replace NHD-0420DZ-FSW-FBW  (Read 1023 times)

BenFR30

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NHD-0420DZW-AY5 to replace NHD-0420DZ-FSW-FBW
« on: January 16, 2018, 08:03:09 AM »
Dear,

We developp few years ago a board to command a LCD character display (4x20), NHD-0420DZ-FSW-FBW.
It works perfectly.
After some researches, I found NHD-0420DZW-AY5, the OLED characters display.
In the datasheet we can see that is compatible with LCD display, but, when i replace my LCD display with the OLED display, it doesn't work.

Is it this OLED display 100% compatible to replace LCD display, with no firmware modification ?

That is the point i'm searching for.

Many thanks in advance for your feedback, I am stuck :(
Benjamin

Saurabh_B

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Re: NHD-0420DZW-AY5 to replace NHD-0420DZ-FSW-FBW
« Reply #1 on: January 17, 2018, 08:18:15 AM »
The display should be compatible for the most part, however a few minor adjustments for the firmware might be necessary.
The instruction execution time for the Oled is a fair amount slower so you might need to add a few delays or check for the busy flag before sending consecutive instructions.

The OLED does also require a larger current input through the +5V (VDD) Input as well, can you check to see if you are limited as to how much current you would be able to supply?

BenFR30

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Re: NHD-0420DZW-AY5 to replace NHD-0420DZ-FSW-FBW
« Reply #2 on: January 18, 2018, 04:30:00 AM »
Hi,

Thank you for your feedback,
I have an external supply, so i have enough poower.

I'm now trying to improve delay.
Thank you for your help.

 

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