??? 01/31/06 22:09 Read: times |
#108842 - Using a 74HC245 to drive NTSC or VGA |
I have a circuit that uses a 74HC245 to drive a Toshiba T6963C controller for an LCD module over a ribbon cable. I believe the cable carries 8-bit data. I am trying to find more info but getting the schematic might be tricky.
From the 8052 based tv diplay post, I understand it is possible to drive a 4 by 2 line character display like from Mr. Predko's NTSC signal generator. The LCD I want to replace measures about 2.5 in by 6 in. and is backlit and has several lines of ascii or psuedo ascii alpha-numeric characters. What I want to do is to take the 8-bit data into a Video DAC and hopefully use some frame store (Stretching out a little for me) to get a pretty stable display. My problem is I can definitely build such a circuit but I need a complete list of parts with which to do it. Some of the descriptions are just a little too vague for my technical skills. I do however, have the component level hardware fabrication skills. But if someone can direct me to where I can get a complete schematic for even a little more sophisticated circuit, I would greatly be appreciative. It is my impression that I might not need to do any programming. My monitor is actually an 8 inch vga monitor that also has ntsc, pal, and s-video inputs and has a usb touchscreen. The monitor has switches on the front that allow the inputs to be selected like a tv monitor. I am using the vga with a computer so several other options are there for the 8-bit data to come in. Can someone please point me in the right direction or post a solution? Grateful in advance, Curtis |