how to use valid signal with readdata in Avalon Memory Mapped Interface

Question

Hi, 
How can I make sure that the incoming data from memory is the response to memory read request and is also valid?

I am using Avalon Memory-Mapped Interface and I want to get a valid signal for each data that I request from memory by a readdata request.

Can I use this condition: (response == 0)? Does it arrive at the same clock that data arrives?

Note that I am using a fixed-latency read, so I am not able to use readdatavalid signal.

Thanks,

Mahdi

sstrell · Accepted Answer

Yes, a response of 0x0 can be sent along with valid readdata.  Check the info "For read responses" in that table.

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