lcd become less visible

[spartekus]

hi all,

i am using EA DOGM128W-6 lcd. when i send program to microtroller.
i see data on lcd screen only for a second normally, then it becomes less visible.
i checked its power supply and it has 3,3V as it should be.

what would you suggest me to do?
thank you

 

[FvM]

I presume you mean DOGM128W-6. Everything connected according to datasheet, e.g. external capacitors?

 

[cl10greg]

How are you setting the contrast? What is your power supply? System schematic or code?

 

[spartekus]

when i start program step by step(with button of mplap x), lcd doesnt look less visible.
should i change speed of spi interface? or what can be reason?

3.3 power supply
https://www.lcd-module.de/pdf/grafik/dogm128.pdf

contrast settings was decided on datasheet, i wrote as on data sheet.

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when i changed speed of microcontroller, lcd worked normally.
thanks for answers.