Abstract: Integrated circuits with pseudo random bit sequence (PRBS) generation circuitry are provided. The PRBS generation circuitry may be configured to support parallel output generation in multiple modes, where the parallel bit width in each mode can be different. The PRBS generation circuitry may include a linear feedback shift register that implements a desired polynomial, one or more XOR tree circuits that produces the parallel output bits, a multiplexer for selectively routing a subset of the parallel output bits back to the input of the shift register, and a gearbox for performing an adjustable bit width conversion. Configured in this way, the PRBS generation circuitry can provide parallel PRBS generation with an adjustable bit width.

Abstract: An invention is disclosed for determining integrated circuit (IC) logic speed. A storage element is provided that includes a reset input in electrical communication with a reset pin. A reset signal is then asserted at the reset pin, and a reset time is measured. The reset time is defined as the time period beginning when the reset signal is asserted and ending when the storage element resets. In this manner, the reset time can be used to determine a speed of the IC logic relative to a process. In one aspect, delay logic is provided that is in electrical communication with the reset pin and in electrical communication with the storage element. In this aspect, the delay logic delays the reset signal for a predetermined time period. Optionally, the reset time can be compared to a predetermined fast corner reset time and a predetermined slow corner reset time. Further, the IC logic speed can be correlated to a simulation using the embodiments of the present invention.