Article ID: 000079894 Content Type: Troubleshooting Last Reviewed: 08/13/2012

Can I monitor the clkswitch input to determine which input clock signal is active when using the clock switchover function in the ALTPLL megafunction?

Environment

    PLL
BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

No, the logic level of the clkswitch input does not correlate to which input clock is active, since the input clock can only be switched on the rising edge of the clkswitch input. Use the activeclock signal to determine which clock is active.

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