Cfag12864b-wgh-v

D

dynamicone

New member
I'm having a little trouble connecting the CFAG12864B to an 8051 board, does anyone know where I can find a schematic with pinout information?

Thanks
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D

dynamicone

New member
Actually I have all of the documentation and have connected the boards together, but the display is not responding, I have checked and rechecked the pinouts and cannot figure out why it is not working. I was hoping someone had a schematic of a connection between the display and an 8051 processor that I could compare to what I have.

Thanks
 
C

CF Support

Administrator
You should check the voltage on Vo, which should be at, for normal use, between -2.5v and -4.5v, as per page 5 of the data sheet for this module.

What voltage is on that pin currently?
 
D

dynamicone

New member
Display

I have a 10K pot on Vo and when I adjust the pot the display goes for clear to dark. The pot goes from the 5V supply to pin 18 with the wiper arm going to pin 3. Still I have no response. I am not using Pins 14, 15, 19 and 20. All other pins have a connection. So, do you have a schematic showing the connection from the CFAG12894B-WGH-V to an 8051 mcu?

Thanks
 
CF Tech

CF Tech

Administrator
/Reset needs to be brought low after power is supplied, then pulled high. A capacitor to ground with a resistor to 5v will handle it in simple situations.

R/W must be tied low--which will only allow writes.

Did you look at the initialization sample code?
 
R

Rince

New member
Hello,

Could i have the initialization code too? I'm also struggeling to get some sign of life out of my module.

Thanks,

Rince
 
J

jimbo

New member
CF Tech, can you also send me the same example code and startup code as well. i too am having trouble with the display.

you should just make the code public.
 
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