Arrow MAX1000 User Manual page 53

5.2.8.10 Rename the pin_name2 to USER_BTN by double clicking its current name. This is going
to be the user button of the MAX1000 board to select the mux.
5.2.8.11 Using the "Node Tool" connect:
CLK12M
USER_BTN  sel (of the counter_mux component)
Your schematic should look like this now:
5.2.8.12 Add the outputs to the schematic
Click on the "Pin Tool" as before, but this time select "Output".
MAX1000 User Guide
 inclk0 (of the PLL component)
Page | 53
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July 2017