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A Discussion on Test Pattern Generation for FPGA—Implemented Circuits
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A Discussion on Test Pattern Generation for FPGA—Implemented Circuits M. Renovell1 , J.M. Portal1, P. Faure1, J. Figueras2 and Y. Zorian3  | (1) | LIRMM-UM2, 161 Rue Ada, 34392 Montpellier Cedex, France |
| (2) | UPC Diagonal, 647 Barcelona, Spain |
| (3) | Logic Vision Inc., 101 Metro Drive, San Jose, CA 95110, USA |
Abstract The objective of this paper is to generate a Application-Oriented Test Procedure to be used by a FPGA user in a given application. General definitions concerning the specific problem of testing RAM-based FPGAs are first given such as the important concept of  AC-non-redundant fault.  Using a set of circuits implemented on a XILINX 4000E, it is shown that a classical test pattern generation performed on the circuit netlist gives a low AC-non-redundant fault coverage and it is pointed out that test pattern generation performed on a FPGA representation is required. It is then demonstrated that test pattern generation performed on the FPGA representation can be significantly accelerated by removing most of the AC-redundant faults. Finally, a technique is proposed to even more accelerate the test pattern generation process by using a reduced FPGA description. FPGA - test - ATPG
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