Abstract: A hardware reconfiguration system for first and second devices is in a lock-step configuration using a comparator that provides a lock-step error indication. The system includes at least one register that stores a lock-step threshold. The system also includes a lock-step monitor configured to compare a count of occurrences of the lock-step error indication from the comparator with the lock-step threshold. When the lock-step threshold is reached, the lock-step monitor is configured to enter a repair state to determine which one of the first and second devices is operating correctly and reconfigure operation into a split-lock mode to resume operation using the one of the first and second devices that is operating correctly.

Abstract: A processing system including multiple devices each providing a data set, multiple comparators each operative to compare a selected pair of data sets, multiple multiplexers each for selecting from among coupled data sets and providing selected data sets to inputs of corresponding comparators, and a comparator configuration controller that controls each the multiplexers to select pairs of data sets provided to the corresponding comparators. The multiplexers provide flexible comparator reconfiguration for improved comparator availability. In the event of failure of a device using a comparator, the controller reconfigures the corresponding multiplexer to re-use the comparator for a similar or different comparison configuration. Data latch buffers and configurable delay gates may be provided between the multiplexers and the comparators. The buffers may have ports available to be loaded by software. Clock multiplexers may be provided to select a clock signal for each comparator based on usage.

Abstract: A hardware reconfiguration system for first and second devices is in a lock-step configuration using a comparator that provides a lock-step error indication. The system includes at least one register that stores a lock-step threshold. The system also includes a lock-step monitor configured to compare a count of occurrences of the lock-step error indication from the comparator with the lock-step threshold. When the lock-step threshold is reached, the lock-step monitor is configured to enter a repair state to determine which one of the first and second devices is operating correctly and reconfigure operation into a split-lock mode to resume operation using the one of the first and second devices that is operating correctly.