Propagation Delay

[Altera_Forum]

Hello,  

can someone tell me what sense does Tpd (propagation delay) has for synchronous output data signals when they are set as fast outputs (it means that the registers are placed at IO pins) ? In my opinion Tpd should be the same for all outputs, but it differs for about 0.1ns in my case. Why ?  Regards Joel

[Altera_Forum]

--- Quote Start ---  Hello,  can someone tell me what sense does Tpd (propagation delay) has for synchronous output data signals when they are set as fast outputs (it means that the registers are placed at IO pins) ? In my opinion Tpd should be the same for all outputs, but it differs for about 0.1ns in my case. Why ?  Regards Joel  --- Quote End ---    Hi Joel,  a propagation delay describes the delay of an asynchronous signal. It is the delay from an input pin through logic to an output pin.   Kind regards  GPK

[Altera_Forum]

ups, obviously I used it in wrong situation. Thank you for the explanation ! 

 best regards