With CLKFBOUT Deskew

Versal ACAP Clocking Resources Architecture Manual (AM003)

Document ID
AM003
Release Date
2022-05-24
Revision
1.4 English

In many cases, designers do not want to incur the delay on a clock network in their I/O timing budget. Therefore, an MMCM is used to compensate for the clock network delay. This feature is supported in Versal ACAPs. A clock output matching the reference clock CLKIN frequency (always CLKFBOUT) is connected to a clock buffer of the same type driving the logic and fed back to the CLKFBIN feedback pin of the MMCM. The remaining outputs can still be used to divide the clock down for additionally synthesized frequencies. In this case, all output clocks have a defined phase relationship to the input reference clock.