LCD with T6963C controller
Hi,
I bought this LCD from EBay:
http://cgi.ebay.ca/ws/eBayISAPI.dll?...tem=7590673939.
WM-G2406D (ver. 2) is written on the back of the PCB. The only datasheet I have is here:
http://zing.com.tw/WINTEK/wm-g2406de.htm
I'm uncertain as to how to wire the V0 and VEE pins. I've found an unrelated schematic that connects them to ground with a potentiometer here:
http://liquid-mp3.schijf.org/schemat...n_DG-24128.gif
But I have doubts and would appreciate confirmation.
I downloaded a PIC Basic Pro program to test my LCD from here:
http://www.compsys1.com/support/PBP_Files/t6963c/
File name: glipict2.bas
I know the author of the program used a Toshiba LCD, but that should only affect the pinout on the LCD. What matters is that both use a T6963C controller and is of the same dimension as the Wintek (240x64).
I am using a PIC 16F877 at 20MHz just like in the program, but nothing happens, blank screen with nice green backlight. I've wired the LCD as the datasheet recommends and I've double-checked the pins on the PIC. I'm at a loss to explain what I'm doing wrong. I know the pic works properly 'cause I've added some switches and LEDs and that works fine.
Sorry for the long post, I tried to put in as much information as possible. I'm guessing that it has to do with the wiring of the LCD. The EBay seller said it only required 5V DC, but I'm wondering if he has his facts straight. The datasheet says model "D" has a single power supply, that would lead me to believe I need a 2nd one to power the LCD. Another thing that sticks out in the datasheet is the Supply Voltage for LCD: VDD-V0 = 12V typical.
I just don't have enough knowledge and experience to link all the dots.
Robert
:)
Re: LCD with T6963C controller
15 years passed since last post :D
I ordered ST7920, but seller sent these instead by mistake. 240x64 resolution. They're on the way, and I'll give them a try once they arrive.
But what I've curious about, documentation mentions built-in fonts, but sample code posted above seems to load own characters, why?
Re: LCD with T6963C controller
Re: LCD with T6963C controller
Well, common HD44780 based displays have 5x7 font, but no one complains...
Anyways, let them arrive and let me see, what they can do :)
Re: LCD with T6963C controller
The pixels are smaller than on a charactor display.
In the text mode you can get 8 lines by 30 charactors with a 240x64 display.
Do you have a datasheet for the displays you are getting?
Hopefully your displays have the built in negative voltage source for the contrast.
Re: LCD with T6963C controller
Well as seller stated, they only need 5V for operation, no separate negative supply needed. It also has contrast adjustment pot soldered on it.