10-25-2020 02:16 AM
I want to calculate the processing time of a digital circuit using simulation, and I have downloaded the Xilinx ISE 14.7 for Windows 10. However, there are so many supporting documents for ISE 14.7 that I am not able to understand how to start with it. Would someone please help me to get started with the Xilinx tool?
Also, since FPGAs usually optimize the processing time of the circuit, is it possible to perform the timing analysis using the Xilinx simulation? For example, is it possible to calculate the processing time of a digital circuit like a Mux decoder or an n-input logic gate, etc.?
10-25-2020 12:31 PM
10-26-2020 08:52 PM
Thank you for your response @drjohnsmith.
The processing time means the time taken by a digital circuit to reflect the change in output after applying input. For example, the time required by a 2x1 mux to provide output=D0 for select line =0 or to provide output=D1 for select line =1.
I am designing an asynchronous circuit with handshaking signals and I want to compare the time required to reflect the change in output after applying input for both synchronous and asynchronous designs. Is it possible to achieve this by analyzing the .twr files for both designs?
10-27-2020 06:49 AM
That's called propergation time in digital electronics.
Tphl and Tplh in an io pin.
Simulation will put these times at 1 delta, normally about 1ps , so no use for what u want.
U need to look up timming report ..
10-27-2020 10:07 PM
Thank you for your reply.
Can we generate the timing report using Xilinx or I need to look for some other software to calculate the timing constraints for a digital circuit?
10-28-2020 06:03 AM
10-30-2020 12:07 AM
You have shared the link https://www.xilinx.com/support/documentation/sw_manuals/help/iseguide/mergedProjects/timingan/timingan.htm#html/ta_hidr_twx_report_viewer.htm which provides a course on timing analyzer. The representation is user-friendly, as the left pane is showing all the contents covered for the course and it can be accessed by clicking the topic. I was wondering whether a similar course is available for the Xilinx ISE basics and how to access it. I have tried to use the support link given on the Xilinx website, but that link is providing pdfs. I would be grateful if you can guide me on how to find any ISE course similar to the timing analyzer course representation provided in the above link.
11-01-2020 09:55 AM