Logic Design for Array-Based Circuits
by Donnamaie E. White
Copyright © 1996, 2001, 2002 Donnamaie E. White
Last Edit July 22, 2001
An optional simulation is that for AC test measurements. If measurements are to be done, the simulations are required. As with at-speed, both sampled and print on change files are required. Sampling is done at 100 ns intervals. These files show 16 AC tests, propagation path measurements only. A test is one input to one output and one edge (rising or falling). The reset is handled as before at the beginning of the file.
AC test submission is complicated and extensive information is required for each test. AMCC offers AMCCSUBMIT, test submission software, to help with the process. Such support is vendor-specific, as is the vector check software.
Figure 8-6 shows a sampled AC test file (16 tests) and Figure 8-7 shows the same tests, print-on-change. (This is not the Q20000 circuit.)
These files pass the AMCC vector check software.
Figure 8-6 AC Test Sampled Simulation - 32-Bit Register (partial)
Figure 8-6 AC Test Sampled Simulation - 32-Bit Register - Full listing
Figure 8-7a AC Test Print-On Change Simulation - 32-Bit Register (partial)
Figure 8-7b AC Test Print-On Change Simulation - 32-Bit Register - Full listing
Create a complete AC test vector set for the schematics shown in the Appendix of Chapter 3.
Copyright @ 2001,
2002 Donnamaie E. White, White