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Altera_Forum
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9 years ago

About VGA Output

Hello, I am working for the first time with FPGA (cyclone v soc) and i am trying to get a output from VGA Port on the monitor. I have set the resolution for 1024x768 and PLL input frequency as ...
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Altera_Forum
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9 years ago

Hi pnayak15 -

It's not possible to drive a monitor directly with 27 2.5V signals (VGA_CLK, VGA_VS, VGA_HS, VGA_R[7:0], VGA_G[7:0], VGA_B[7:0]). There must be an encoder/transmitter IC between the FPGA and the monitor (I assume DVI or HDMI). These transmitter ICs typically have a DE (data enable) input that must be driven. If you don't drive that signal then you won't get a valid signal to the monitor.

What is between the FPGA and monitor? Include everything, including (transmitter, connector, cable, etc). And what model of monitor are you driving?