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bus problems

tom over 3 years ago

Hi all

I have some problems about ahb. I have some experience with axi , but I am not familar with AHB.

Q1:Allthough AHB is old comparing with axi, it seems that ahb will not be replaced by axi. AHb is still popular. And AHB5 is released in few year ago. Comparing with axi, what is the advantage of using ahb?

Q2: why ahb's latecy is smaller than axi?

Q3: I know some arm cpu will use ahb bus or axi bus? I would like to know what reasons behind that.

Thanks a lot!

Top replies

Martin Weidmann over 3 years ago +1 suggested

It doesn't cover all your question, but for Q1 you might find this page useful: developer.arm.com/.../What-is-AMBA--and-why-use-it-
Colin Campbell over 3 years ago in reply to tom +1 suggested

1. The advantages of using AHB-lite or AHB5 over the newer AXI protocols is mainly familiarity for some and lower pin count on interfaces or lower routing complexity. AHB has been around longer, so designers...