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Topics - tseyfarth

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OLEDs / Questions regarding NHD‐0220DZW‐AY5 & NHD‐0420DZW‐AY5
« on: August 17, 2015, 12:04:31 AM »
Hello all,

I have several questions regarding the two above captions OLED displays.  I have been using the LCD versions of both of these [NHD-0220DZ-FL-YBW & NHD-0420DZ-FL-YBW].  The OLED's appear to work, but over time a character is lost on the left, like the display is shifted or something.

I would like to know:
1)  May I please have a list of compatible Chipsets?  I know the OLED is proprietary and is "based on the LCD version".  But that is not helping me much.  I would like to use either 8bit or 4 bit, I have all pins connected to uC.  A Selection of Chipsets would be very helpful for my engineering team.

I believe we *think* these are compatible chip sets but not sure since we cannot find any real answers.
ST7066U
HD44780
KS0063
KS0065B

2)  May I please have sample start up code for these OLED's
3) On another post, the respondant said that there is a timing issue - can anyone elaborate on that - ie the difference(s) between the LCD and OLED displays for Chipset x?
4) Does anyone have any idea why the chars on the left would be disappearing over time?  On a power cycle, they all appear properly (saved in EEPROM).  However, even with clear screen and reinitialization, this still occurs - it takes up to 3 weeks to become evident.

Thank you in advance!
Tim

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OLEDs / NHD‐0220DZW‐AY5 loosing columns
« on: August 05, 2015, 05:22:15 PM »
Hello all,

I am using an Atmel ATMEGA32A to drive an OLED -  NHD‐0220DZW‐AY5 (2x20 and 4x20).  The same code is also used to drive an LCD  NHD‐0220GZ‐FL‐GBW again, either a 2x20 or 4x20.  With the OLED, over time, characters are lost. Seems to be on the left side of the screen.  It takes several weeks for this to happen and only happens with the OLED.

For code development we use BASCOM by MCS Electronics.   
The enclosed screen shot shows the display - the top line is missing the "W"  for "Welcome"; the second line is missing the "T" for "Titan".  Over time, it gets worse with more characters missing from the left side.

Can anyone suggest what is wrong and how to fix it?
Thank you,
Tim

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