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Voyager
Voyager
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Registered: ‎10-12-2016

The BUFMR enables multi-region chaining of BUFIOs and BUFRs ?

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Hi Friends, 

In UG472 Mentioned that "The BUFMR enables multi-region chaining of BUFIOs and BUFRs ". 

Can anyone pls explain more clearly this if possible with an example {explanation is enough code is not required}.

 

Thank You

S Sampath

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Voyager
Voyager
259 Views
Registered: ‎02-01-2013

Re: The BUFMR enables multi-region chaining of BUFIOs and BUFRs ?

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BUFMR's fill a 'gap' between BUFG's and single-bank BUFR.  As described in UG472:

2019-01-15_7-04-42.jpg

BUFG's can span an entire chip, but there are a limited number of them and they pick up jitter as they grow. A BUFR (like a BUFIO) introduces very little jitter, but can only reach resources within a single bank. The BUFMR allows one to create a tightly timed IO interface that spans (up to 3) adjacent banks. This feature is essential for creating large IO interfaces that cannot fit into one bank.

-Joe G.

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Voyager
Voyager
260 Views
Registered: ‎02-01-2013

Re: The BUFMR enables multi-region chaining of BUFIOs and BUFRs ?

Jump to solution

BUFMR's fill a 'gap' between BUFG's and single-bank BUFR.  As described in UG472:

2019-01-15_7-04-42.jpg

BUFG's can span an entire chip, but there are a limited number of them and they pick up jitter as they grow. A BUFR (like a BUFIO) introduces very little jitter, but can only reach resources within a single bank. The BUFMR allows one to create a tightly timed IO interface that spans (up to 3) adjacent banks. This feature is essential for creating large IO interfaces that cannot fit into one bank.

-Joe G.

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