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AR# 15670

Virtex-II Pro RocketIO - The RXCOMMADET output stays High for multiple cycles


Why does the RXCOMMADET output stay High for multiple cycles?


The RXCOMMADET and RXREALIGN outputs are originally generated in the RXRECCLK domain and are then re-synchronized to the RXUSRCLK2 domain. To ensure that asserted values are reliably brought out to the fabric regardless of data path width, relative clock phase, and frequencies, the pulse will be stretched and may stay High for multiple cycles.

AR# 15670
日期 05/14/2014
状态 Archive
Type 综合文章