08-20-2017 07:43 AM
In the timing summary report I can see that I have timing issues (high fanout = 15136) from the CLOCKOUT1 of the mmcm.
Relevant schematic is attached, and the timing report.
How can I fix the timing issue from the CLOCKOUT1 of the mmcm (e.g Source: clk_rst_ctrl_i/clk_wiz_0_i/inst/mmcm_adv_inst/CLKOUT1, Destination: rx_top_i/demoder_i/corr_res_i/rd_ptr_reg/CE)
I use phys_opt_design command.
08-20-2017 07:52 AM
08-20-2017 08:24 AM
This is the same thing as your other post.
A high fanout of a clock is expected - this is why the clock buffers exist. But they are only used to drive clock pins of clocked cells.
Here again, you have the clock signal driving the CE of a cell - this is not a clock pin, and hence should never be directly reached by a clock signal - either directly from the MMCM or through a clock buffer.
08-29-2017 03:12 AM
If everything is clear for you on this subject, please mark the thread as solved.