What's the difference between FPGA block RAM and distributed RAM?

This article introduces the relevant knowledge of "what's the difference between FPGA block RAM and distributed RAM". In the operation of actual cases, many people will encounter such a dilemma. Then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

One of the differences

The output of bram requires a clock, and dram can output data after giving the address.

The second difference

It is more flexible and convenient for dram to use root.

The third difference

Bram has large storage space, and dram wastes LUT resources.

1. Physically, bram is a customized ram resource in fpga, and dram is spelled out with logical units.

two。 For larger storage applications, it is recommended to use bram; sporadic small ram, generally using dram. But this is only a general principle, and the specific use depends on the redundancy and performance requirements of the resources in the whole design.

3.dram can be pure combinational logic, that is, the address is given immediately out of data, or you can add register to become a ram with a clock. And bram must have a clock.

4. For larger storage applications, it is recommended to use bram; sporadic small ram, generally using dram. But this is only a general principle, and the specific use depends on the redundancy and performance requirements of the resources in the whole design.

5.dram can be pure combinational logic, that is, the address is given immediately out of data, or you can add register to become a ram with a clock. And bram must have a clock.

6. If you want to produce a large FIFO or timing, use BlockRAM. Otherwise, you can use Distributed RAM.

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