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LogiCORE IP Ethernet AVB Endpoint v3.1 - Timing errors are occasionally seen when targeting Spartan-3 devices
When I use the Ethernet AVB Endpoint v3.1 core and target a Spartan-3 device, the following timing constraint occasionally produces timing errors similar to the following:
TS_rtc_clock = PERIOD TIMEGRP "rtc_clock" 8 ns HIGH 50%;
Running the implement tools again with a different cost table usually resolves this issue.
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