FPGA design tutorial

Black Mesa Labs has been posting an FPGA tutorial in recent posts.

An array of D Flip-Flops by themselves just isn’t that useful. You can implement a shift-register ( which I did ) and that’s about it. Sure – add a Q-not and you’ll get a Div-2 clock divider. There must be more to FPGAs and there is – in the magical LUT ( Look Up Table ). A LUT is a very small SRAM.

Now just stick this simple LUT in front of each Flip-Flop of an FPGA and some very interesting logic designs can be implemented. Note that Synthesis and Mapping takes care of configuring these LUT memories. Once FPGA configuration has completed, each LUT can be thought of as a fixed Boolean logic gate in function.

You can check out this tutorial and the series.


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