| 摘要 |
PURPOSE:To prevent the error of setting of test data and simplify the operation, by writing preliminarily required data in an ROM and performing the test while renewing the read address of this ROM step by step. CONSTITUTION:Address data and control data required for the test are stored preliminarily in an ROM5 in a prescribed address order and are read out successively by an address signal from the external which is renewed successively. Data outputted from the ROM5 are set to an address register 1 and a data register 2 respetively, and simultaneously, control data from the data register 2 is set to a specific data register in a circuit 3 to be tested. A lighting circuit for indicating lamp or the like is tested by this control data. Thus, the error of setting of test data is prevented, and the operation is simplified. |
