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pitbuell94 · 25th Oct 2012, 2:31 pm

Hi dominicbeesley,

What kind of FPGA kit did you have?

Mine is a FPGA kit from Digilent.

It's an NEXYS2 with a SPARTAN 3E and 500K gates.

For the converter, I thing you can use less than 500K gates.

In fact, you need at least in the FPGA to have around 8 KBytes of RAM.

=> 4 KBytes per FIFO => there is 2 FIFO working in paralel.

Then you add TDA8708, TDA 8702 and a EL4583( synchro extractor).

Don't forget to put to all signal a resistor between 100 ohms to 470 ohms to avaoid frying your FPGA ( Only 3v Tolerant...).

If you want my final code, I can supply it to you.

The same for the schematic.

Fred C.( Pitbuell94).

25th Oct 2012, 2:31 pm	#189
pitbuell94 Retired Dormant Member Join Date: May 2009 Location: Fresnes, France Posts: 124	Re: 819 line standards convertor. Hi dominicbeesley, What kind of FPGA kit did you have? Mine is a FPGA kit from Digilent. It's an NEXYS2 with a SPARTAN 3E and 500K gates. For the converter, I thing you can use less than 500K gates. In fact, you need at least in the FPGA to have around 8 KBytes of RAM. => 4 KBytes per FIFO => there is 2 FIFO working in paralel. Then you add TDA8708, TDA 8702 and a EL4583( synchro extractor). Don't forget to put to all signal a resistor between 100 ohms to 470 ohms to avaoid frying your FPGA ( Only 3v Tolerant...). If you want my final code, I can supply it to you. The same for the schematic. Fred C.( Pitbuell94).