| 摘要 |
PURPOSE:To execute smoothly processing in a microcomutor by holding an interruption until a second instruction following a first instruction is completed if any internal or an external interruption is generated during the first instruction designating a background register being performed. CONSTITUTION:An output of a three input AND gate 3 having three inputs comparing of an output of an inverter 1 using a BANK signal BANK generated by executing a BNK instruction as an input, an interruption request signal IRQ and an output of an inverter 2 using an interruption performing control signal IEC to be formed in this circuit as an input is given to a clocked inverter 4 driven by the first clock CL 1. An output thereof is given to a clocked inverter 5 driven by the second clock CL2. An output of this clocked inverter 5 is given to a processor section as the signal IEC.
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