| 摘要 |
PURPOSE: A PCB version checking device is provided to enable a microcomputer to easily checking the version of a plurality of PCBs. CONSTITUTION: A PCB(Printed Circuit Board) version confirm circuit(10) is mounted on a PCB. The PCB version checking circuit comprises a first resistance(11) and a second resistance(12). One end of the first resistance is connected to a power. A port of a microcomputer(20) is connected to the connection points of the first and the second resistances. A voltage value is inputted through the port. The microcomputer recognizes the PCB version based on the voltage value.
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