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AR# 7640

CPLD XPLA1 - The XPLA fitter does not allow a pin associated with an asynchronous clock to be used as a standard I/O

Description

My fitter does not allow me a pin associated with an asynchronous clock signal to be used as a standard I/O. Why?

解决方案

If an asynchronous global clock is driven by an internal product term expression, the global clock pin associated with this clock is driven by the output macrocell. This excludes the use of the pin for any other function.

AR# 7640
创建日期 08/21/2007
Last Updated 05/14/2014
状态 Archive
Type 综合文章