原帖由 KSC 於 2007-7-15 23:11 發表
即是說上邊的字是這樣看?
MI = “H”: 6800 series MPU interface
MI = “L”: 8080 series MPU interface
RW_WR
[ ...
YES.
I found out why I mis-coded the LCD bias as A2 instead of A3. Orginally, I wrote the driver based on ST7565 which has A2=1/9 and A3=1/7. For KS0713, A3=1/9 and A2=1/7. To match the KS0713 datasheet, I updated the post on #37 to avoid confusion.
I tried 1/7 and 1/9 bias, the difference is the LCD driving voltages V1-V4, both settings worked but with different contrast/brightness and I could use V5 ratio and Electronics Volume to balance them. Anyway, for this 18pin LCD, A3 (1/9) is more appropriate (to match its specification). |