| 摘要 |
In a logical unit provided with a plurality of internal registers (12 to 15; 20), an internal memory (11-1, 11-2; 21) and a combinational circuit (16), such as an arithmetic unit, at least one (13 or 14; 20) of the plurality of internal registers is arranged to be scanned in and out. During diagnosis, when executing an instruction which makes reference to the internal memory (11-1, 11-2; 21), the register than can be scanned in and scanned out is used in place of the internal memory 11-1, 11-2; 21) for diagnosing the combinational circuit (16). |
