| 摘要 |
PURPOSE:To simplify the check of troubles by checking the parity of each output signal from an AND array generating the AND of an output signal of a decoding circuit and an OR array generating an optional OR of the AND array. CONSTITUTION:An AND array 2 generates an optional AND of output signals of a decoding circuit 1 decoding external input signals. An OR array 3 generates optional OR of output signals of the AND array. A register circuit 4 controls the output signals of the AND array 2. Parity check circuits 51, 52, 53 check the parity of output signals of a decoding circuit 1, the AND array 2 and the OR array respectively. Troubles are checked by observing the output signals of the parity check circuits 51, 52, 53. |
