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Altera_Forum
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12 years ago

Configurable LUTs in Altera FPGAs

Hi, I've used Xilinx CFGLUT5 primitive quite a lot. It allows runtime LUT reconfiguration. The documentation of cfglut5 is here (http://www.xilinx.com/itp/xilinx10/books/docs/virtex5_hdl/virtex...
Altera_Forum's avatar
Altera_Forum
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12 years ago

Interesting. Never seen that before, but looks like a serial input into their CLBRAM function.

I don't believe Altera FPGA's have such a thing. Could you use a LUTRAM to do something similar? I assume your block is bigger than 1 LUT, and hence a RAM should work similarly, you just have to control the addressing logic. (Do you currently do the CFGLUT from a processor?) It's not identical, but might work.