Altera_Forum
Honored Contributor
Honored ContributorBlack and white on VGA port
Hi
I want black and white video on VGA port, but I donot know what clock I should use! VGA clock or black and white video clock! Can any body suggest me here! Thank YouForum Discussion
5 Replies
Altera_ForumVGA port always needs to run on VGA clock, no matter whether you use colour or black and white.
- Altera_Forum
Hi Tricky
My base clock is 100MHz. I have used 25MHz clock for 640x480 resolution on vga port. But the display picture (on CRT display monitor) is not perfect. The exact clock for 460x480 is 25.175MHz. But the factors does not exist(for 25.175MHz). Can you tell me how I can achieve 25.175MHz with the help of PLL ? Thank You - Altera_Forum
Use the megawizard. You set up all the setup details in the wizard.
- Altera_Forum
It doesn't work with Cyclone II, you have to sync on 25.0 MHz. Any reasons to assume, that your display won't accept it?
- Altera_Forum--- Quote Start --- It doesn't work with Cyclone II, you have to sync on 25.0 MHz. Any reasons to assume, that your display won't accept it? --- Quote End --- Hi previously I was running PLL in normal mode, but after suggestion to use PLL in sync mode, I have compile it in this mode. But again display showing the same problem.(display accept the output but at the output whole picture break up into 4 segments.) I have selected the resolution of the display at 640x480. Thank You
