Patent ID: 8150647

Claim:
An electric device comprising: a plurality of circuits that are operable in synchronization with a clock signal; a plurality of flip-flops each of which is capable of acquiring a data value of a signal from a corresponding one of the plurality of circuits in synchronization with the clock signal and storing the acquired data value therein until receiving a next clock signal, each flip-flop capable of entering into a clock-disabled state, when receiving a signal at a disable terminal thereof, in which the acquired data value continues to be stored in the flip-flop after receiving the next clock signal; a timing controller that is capable of outputting a hold signal to the disable terminal of each flip-flop at a timing at which a corresponding circuit is desired to be diagnosed; and a plurality of diagnosis lines that are respectively provided in correspondence with the plurality of flip-flops, each diagnosis line being capable of outputting as diagnosis data a data value stored in a corresponding flip-flop.