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Observer tvgod2000
Observer
208 Views
Registered: ‎07-27-2018

I want to know that behavioral S Port of ODDR2.

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Port description of ODDR2 in the u381 (SelectIO resource) Datasheet.

S : Set. Software will be error if both R and S are connected to 1

I thought S was for enabling purposes, but with S=0, there is a Q value in the P&R Simulation of ISE.

What is the exact purpose of S?

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Community Manager
Community Manager
163 Views
Registered: ‎08-08-2007

Re: I want to know that behavioral S Port of ODDR2.

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Hi @tvgod2000 

 

S : Set is not for enabling, it can be used to set the output to 1.

There is a truth table for the ODDR2 in the Libraries Guide that may be useful for you to understand the purpose of the different ports. 

http://www.xilinx.com/support/documentation/sw_manuals/xilinx14_7/spartan6_hdl.pdf

There is a CE : Clock Enable port that is used for Enabling. 

 

Sandy

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Community Manager
Community Manager
164 Views
Registered: ‎08-08-2007

Re: I want to know that behavioral S Port of ODDR2.

Jump to solution

Hi @tvgod2000 

 

S : Set is not for enabling, it can be used to set the output to 1.

There is a truth table for the ODDR2 in the Libraries Guide that may be useful for you to understand the purpose of the different ports. 

http://www.xilinx.com/support/documentation/sw_manuals/xilinx14_7/spartan6_hdl.pdf

There is a CE : Clock Enable port that is used for Enabling. 

 

Sandy

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Observer tvgod2000
Observer
142 Views
Registered: ‎07-27-2018

Re: I want to know that behavioral S Port of ODDR2.

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Thanks.!!

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