| 摘要 |
PURPOSE: A reset device of a microcontroller is provided to determine an initial value of a program counter by changing a reset vector from the outside of a microcontroller in case that a reset signal is released from an active state. CONSTITUTION: A program counter(10) memorizes an address of a command to be performed and accesses a memory in order. An AND gate(AD) performs an AND operation of an address signal(Address) and a system clock(CLK), and outputs a result operated as a control signal. A counter(30) receives a reset signal(RST) and clears the program counter(10). In addition, the counter(30) determines a reset vector. A reset control unit(20) is controlled by the address signal and initializes the program counter(10) with the reset vector determined from the counter(30).
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