GreenPAK Universal
Development Board
Silego Technology Inc.
www.silego.com
10/13/2014
Figure 4-3. Pin 20 mode
Next component in this design is Look-Up table. First Look-Up (LUT4) table is used to
generate logic “1” only when there are high logic levels on both inputs (AND gate). Select AND
gate from “Standard gates” drop-down menu or set table manually. Second Look-Up (LUT5)
configured as NOR gate. It is used to generate reset signal for counter on PIN3 falling edge.
