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Could you explain the meaning of "back pressure" in http://wiki.analog.com/resources/fpga/docs/hdl?

Question asked by yanjiesh on Jan 28, 2015
Latest reply on Jan 31, 2015 by yanjiesh

Dear all,

 

Today I have been studying ADI Reference Designs HDL User Guide [Analog Devices Wiki] again ever since I built the Zedboard and AD-FMCOMMS3 system project last month.

 

I saw "back pressure" appeared when talking about the AXI-stream interface.

 

Here are those original words: The important thing is understanding how back-pressure is handled, not finding signal equivalents. The ADC supports NO back-pressure mechanism. You must accept data on the bus in definite time intervals (defined by the sampling rate). There are no exceptions.

 

I don't understand what are signal equivalent or what is back-pressure?

 

 

R.

 

-Jie

 

2015/1/28

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