| 摘要 |
PURPOSE: A DDC(Display Data Channel) control circuit is provided to prevent data damage or channel conflict by collectively processing monitor data individually input into plural monitor interfaces. CONSTITUTION: The circuit comprises plural monitor interfaces(30), a monitor input sensor(12), a DDC communication controller(18), a memory(20), and a graphic controller(5). The monitor interfaces(30) connect to the monitor circuits having different characteristics. The monitor input sensor(12) senses the connection of the monitor circuits to the monitor interfaces(30). If the monitor circuits are connected to the monitor interfaces(30), the DDC communication controller(18) outputs a data request signal to the monitor circuits sequentially according to a preset priority, and transmits the monitor data, input via the monitor interfaces(30) according to the data request signal, to the graphic controller(5). The memory(20) stores a communication priority table including priority data different according to the kinds of the monitor circuits.
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