| 摘要 |
PURPOSE: An interrupt controller is provided to perform a stable operation by composing a circuit suitable for a shape of an interrupt signal inputted from an interrupt source. CONSTITUTION: An interrupt signal converting unit(210) receives an interrupt signal from an interrupt source and converts the received interrupt signal into a signal suitable for an interrupt controller to output. A first D-flip flop(211) is synchronized to a clock signal(CLK) and outputs an interrupt signal inputted from the interrupt source. A second D-flip flop(212) is synchronized to the clock signal(CLK) and outputs a signal inputted from the first D-flip flop(211). An AND gate(214) receives the output signal of first D-flip flop(211) and an inversed output signal of the second D-flip flop(212), and performs an AND operation. A multiplexer(220) responses to the interrupt signal inputted from the interrupt signal converting unit(210) and selectively outputs one between signals inputted from a first input terminal and a second input terminal.
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