21-03-2017, 11:56 PM
Hi Jeffrey
It's a TVP5416 that I am using. The default mode is 27 MHz clock with the Y and C output in series through one port but it can be programmed to output Y and C in parallel through separate ports, the clock is then 13.5 MHz. I wanted separate Y out as I thought the likelihood of successfully separating Y and C at 27 MHz wasn’t great using a microcontroller and some logic gates as they were the components I intended to use when I started, but now with a FPGA a smaller chip like the TV5150 would be a better choice.
My goal is to eventually move all the functions preformed by the microcontroller to the FPGA. This will be done bit by bit as I learn, so hopefully one day a “bit banger” will be on the cards.
I intend to use the frame stores for now at least but it is tempting to use the memory in the FPGA. So while the need for the input and output clocks to be synchronous isn’t immediate, it would be nice to have them that way, should the need arise.
When you put the sync generating that ways it sounds straight forward, I will have a think about it and I'm sure it will all eventually fall into place.
Frank
It's a TVP5416 that I am using. The default mode is 27 MHz clock with the Y and C output in series through one port but it can be programmed to output Y and C in parallel through separate ports, the clock is then 13.5 MHz. I wanted separate Y out as I thought the likelihood of successfully separating Y and C at 27 MHz wasn’t great using a microcontroller and some logic gates as they were the components I intended to use when I started, but now with a FPGA a smaller chip like the TV5150 would be a better choice.
My goal is to eventually move all the functions preformed by the microcontroller to the FPGA. This will be done bit by bit as I learn, so hopefully one day a “bit banger” will be on the cards.
I intend to use the frame stores for now at least but it is tempting to use the memory in the FPGA. So while the need for the input and output clocks to be synchronous isn’t immediate, it would be nice to have them that way, should the need arise.
When you put the sync generating that ways it sounds straight forward, I will have a think about it and I'm sure it will all eventually fall into place.
Frank
