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Xilinx software to sketch AND and OR gates 
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#1
Jan2112, 04:47 PM

P: 76

1. The problem statement, all variables and given/known data
In the Xilinx software symbol library (student edition version 10.1), the maximum number of inputs for AND and OR gates is 9. What would you do if a 10input AND and OR gates are needed? Draw the schematic diagrams and show the connections. 2. Relevant equations (a1+a2+....+a10)=(a1+a2+....+a9) +a10 Boolean Equations: AND: multiply each input = output OR: add each input = output 3. The attempt at a solution Put the AND operations to 9 AND input and then pass the output to the two inputs with another input as a10. Similar thing can be done to OR gates. I have attached my attempt sketch. It looks like I have 11 inputs in total and I need 10. How can I sketch the connections of the 10input gates? 


#2
Jan2112, 09:29 PM

P: 578

Xilinx ISE has a notation for something we might call a "bus". It is a name follow by an interval specifier. See the example below.



#3
Jan2112, 09:33 PM

P: 578

So you could label each dangling wire, and then connect all ten wires together to a bus named "a(9:0)" just as the bus "Avail(3:0)" picture above.



#4
Jan2112, 10:58 PM

P: 76

Xilinx software to sketch AND and OR gates
I think I need to take two 5input AND gates and connect the 10inputs. Then take 1 2input AND gate and connect output of two gates to the input of gate. Will the whole system function as a 10 input AND gate?
How do I represent that? I've attached my attempt 


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