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DLPC3437: The TTL input port issue of FPGA XC7Z020 that include in DLPC3437 platform

Part Number: DLPC3437

Hi, 

We have build a DLPC3437 projection platform and may mass production in this month.

We also have a frond end controller that can output TTL format image signal to FPGA XC7Z020 TTL input port (include DLPC3437 reference design).

I would like to confirm the FPGA XC7Z020 TTL input port format and clarify define.

I need to know the TTL clk and TTL data is " CLK Low to High trigger data" or " CLK high to low trigger data" ?? which one is correct??

Clock low to high then trigger data

Clock High to low then trigger data