摘要:
A built-in self-test (BIST) circuit is configured to divide data output bits of a RAM macro into a plurality of groups each consisting of 2 bits, and provide a 1-bit comparator of a signature analyzer for each group to share one 1-bit comparator by respective two data output bits. A selector of a bit changer sequentially selects a data output bit from each group, and the 1-bit comparator sequentially compares output data for the selected data output bit with expected value data.
摘要:
Timing verification of the LSI test data is performed as follows. In test synthesis, a script text for static timing analysis (STA) is generated together with a test circuit. The STA script text is used to perform static timing analysis. Function verification is performed between a netlist generated through the test synthesis and a timing-verified netlist based on the static timing analysis. The function-verified netlist is released to a production division, and the netlist is used to automatically generate a test pattern by an automatic test pattern generation (ATPG) tool. A netlist comprising test vectors for automatic test equipment is acquired from the generated ATPG pattern.
摘要:
The outputs of selectors 230 to 23N are respectively connected to the data inputs DI0 to DIN of a RAM 10A. One inputs of selectors 540 to 54N are respectively connected to the data outputs DO0 to DON of the RAM 10A, the other inputs are connected to corresponding outputs of the selectors 230 to 23N. The outputs of the selectors 540 to 54N are connected to data inputs D of respective scan flip-flops 520 to 52N. Not in a RAM test mode, data input lines 210 to 21N are selected by the selectors 230 to 23N to provide to the data inputs DI0 to DIN of the RAM 10A and to the scan flip-flops 520 to 52N through the selectors 540 to 54N, respectively.