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AR# 21386

LogiCORE SPI-4.2 (POS-PHY L4) - How do I choose between Global Clocking and Regional Clocking?

描述

How do I choose between Global Clocking and Regional Clocking?

解决方案

Both regional clocking and global clocking with DCM can operate up to 1 Gbps in a Virtex-4 device. Regional 

clocking requires fewer clock resources than global clocking with DCM; however, it places 

an area restriction on the logic that uses the regional clock. See the "Constraining The Core" section of the SPI-4.2 User Guide.

AR# 21386
日期 05/19/2014
状态 Archive
Type 综合文章
的页面