| 摘要 |
PROBLEM TO BE SOLVED: To make establishabel a test of a small number of pins which can effectively input the instructions by means of an external test LSI and an internal data receiving circuit of a one-chip microcomputer. SOLUTION: When the instructions which are already stored in the instruction storing registers 22-24 are inputted to an instruction input register 21, the instructions stored in the instruction store registers 32-34 are used again. When an instruction other than those stored in the registers 22-24 is inputted to the register 21, this inputted instruction is serially transferred and used. |
