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Altera_Forum
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18 years ago

Connecting Altera FPGA to external Serializer/deserializer (LVDS)

Hello all; I'm trying to connect Serializer/deserially to FPGA. The reason is to transmitt or receive high speed serial data. To transmitt data, tclk from FPGA is required to supply to ...
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Altera_Forum
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18 years ago

Sorry, but your hardware setup is completely unclear. I guess, that your measurements are at a LVDS output from FPGA to an external device. If so:

- which FPGA family?

- wich type of LVDS driver (I/O standard)?

- which external receiver?

- what kind of termination is involved?

- how you are measuring the said data (probe, oscilloscope)?

To my opinion, it's simply impossible to achieve > 1ns tr/tf with a correctly operated LVDS driver (any type, either Altera FPGA or external chips).