Patent ID: 7596734

Claim:
A system for performing AC self-test on an integrated circuit that includes a system clock for normal operation, the system comprising: said system clock; self-test circuitry including: an AC self-test controller; and a clock splitter, wherein input to said clock splitter includes said system clock and said AC self-test controller and the clock splitter generates a sequence of data pulses, the sequence including a long data capture pulse followed by an at speed data launch pulse and an at speed data capture pulse followed by a long data launch pulse, and further wherein the at speed data launch pulse and the at speed data capture pulse are generated for a common cycle of the system clock; a first and second test register for capturing and launching test data in response to the sequence of data pulses; and a logic circuit to be tested, wherein input to said logic circuit includes data from said first test register and output from said logic circuit is stored in said second test register.