STORAGE ELEMENT WITH STORAGE AND CLOCK TREE MONITORING CIRCUIT AND METHODS THEREFOR

摘要

A storage element with monitoring circuit, comprising a previous state information storage element configured to record a previous state of a monitored state information storage element, a state change indication unit having a clock input terminal coupled to the clock signal input interface, a state change indication unit being configured to generate a state change indication signal indicative of whether the monitored state information storage element shall have performed a state change by observing the data at a data input interface and a data output terminal, and a state change confirmation unit configured to generate a storage fault indicator by observing the data output terminal of the monitored state information storage element and the data output of the previous state information storage element and checking whether the result of this observation is in line with the state change indicator.

主权项

1. A storage element with monitoring circuit, comprising:
a data input interface providing data; a data output interface; a clock signal input interface providing a clock; a storage fault indicator interface; a monitored state information storage element having a clock input terminal coupled to the clock signal input interface, a data input terminal coupled to the data input interface and a data output terminal; a previous state information storage element having a clock input terminal coupled to the clock signal input interface, and a data input terminal coupled to the data output terminal of the monitored state information storage element, the previous state information storage element being configured to record the previous state of the monitored state information storage element; a state change indication unit having a clock input terminal coupled to the clock signal input interface, the state change indication unit being configured to generate a state change indicator indicative of whether the monitored state information storage element shall have performed a state change by observing the data at the data input interface and the data at the output terminal of the monitored state information storage element; and a state change confirmation unit coupled to the state change indication unit, the state change confirmation unit being configured to generate a storage fault indicator by observing the data at the output terminal of the monitored state information storage element and the data at the output of the previous state information storage element and checking whether the result of this observation is in line with the state change indicator.