Patent ID: 8954794
Filing Date: 2015-02-10
Classification: G06F

Abstract:
1. A system for detecting register corruption of redundant CPUs operating on the same input data comprising: a separate bus in each of the redundant CPUs, each bus configured to read at least one predetermined register of the respective one of the redundant CPUs in a non-invasive way; and a comparator to compare contents of at least one set of according registers of different ones of the redundant CPUs to detect corrupted register contents, wherein each of the CPUs comprises an output port to output contents of the at least one predetermined register of the corresponding one of the CPUs non-invasively read by the respective separate bus, wherein the predetermined registers are m-bit wide, wherein the width of the output port is m/n-bit wide providing a reduced width for the comparator to compare the contents of the at least one predetermined register of different ones of the CPUs to detect corrupted registers in the form of according registers with inconsistent contents, wherein m is a predetermined natural number with m=n·i, and is a predetermined natural number with i≧2.