Abstract: A computer motherboard includes a display controller, a digital visual interface integrated (DVI-I) connector, and a switching unit. The switching unit includes four first terminals, two second terminals, and a control terminal. Two of the first terminals are respectively connected to clock and data pins of a first display data channel (DDC) of the display controller, the other two first terminals are respectively connected to clock and data pins of a second DDC of the display controller, and the second terminals are respectively connected to DDC clock and DDC data pins of the DVI-I connector. The control terminal is connected to a hot plug detect pin of the DVI-I connector to detect a voltage and correspondingly control the second terminals to be respectively connected to the two first terminals connected to the clock and data pins of the first DDC or the second DDC.

Abstract: A time sequence control circuit that can control time sequence of a computer. After the computer is turned on, a power supply terminal outputs a high level enabling signal to an enabling pin of a power supply circuit, the power supply circuit is active. A power supply pin of the power supply circuit outputs a standard voltage to a power pin of each of the motherboard components. A first electronic switch is turned on, a second electronic switch is turned off, and a power supply state pin of the power supply circuit outputs a high level power supply state signal to a power state input pin of a main chip after the power supply circuit outputs the standard voltage.

Abstract: A computer motherboard includes a display controller, a digital visual interface integrated (DVI-I) connector, and a switching unit. The switching unit includes four first terminals, two second terminals, and a control terminal. Two of the first terminals are respectively connected to clock and data pins of a first display data channel (DDC) of the display controller, the other two first terminals are respectively connected to clock and data pins of a second DDC of the display controller, and the second terminals are respectively connected to DDC clock and DDC data pins of the DVI-I connector. The control terminal is connected to a hot plug detect pin of the DVI-I connector to detect a voltage and correspondingly control the second terminals to be respectively connected to the two first terminals connected to the clock and data pins of the first DDC or the second DDC.

Abstract: A time sequence control circuit that can control time sequence of a computer. After the computer is turned on, a power supply terminal outputs a high level enabling signal to an enabling pin of a power supply circuit, the power supply circuit is active. A power supply pin of the power supply circuit outputs a standard voltage to a power pin of each of the motherboard components. A first electronic switch is turned on, a second electronic switch is turned off, and a power supply state pin of the power supply circuit outputs a high level power supply state signal to a power state input pin of a main chip after the power supply circuit outputs the standard voltage.

Abstract: A motherboard of a computer includes a platform controller hub (PCH), a central processing unit (CPU) including a display processing module and a transmission module, a power supply generating module, and a control circuit. The PCH is connected to a display and the display processing module. The display processing module is also connected to the power supply generating module and the control circuit. The transmission module is connected to a graphic card when the graphic card being present in the motherboard. When installed, the graphic card is also connected to the display and the control circuit. The control circuit is also connected to the power supply circuit.