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LCD 5V with 1/8 cycles problem

Question asked by norzilah abu bakar on Nov 30, 2016

Hi Everyone,

I am using the K30 to drive my LCD. My LCD operate at 5V with 8x24 LCD 1/3 bias. 

I am able to run my LCD correctly after for few minutes. The problem comes after that. Some of the segment

that is should be off is turn on. I realize that the segment affected is only those at the BP5-BP8. 

Fyi, I am using charge pump to drive my LCD. 

Is there any register that I  need to define  beside LCD_GCR[DUTY] to make my LCD run properly.