Time sequence control circuit
一种时序控制电路、电源电路的技术，应用在数据处理电源、产生/分配信号等方向，能够解决主芯片逻辑混乱、电脑不能正常运行等问题
Inactive Publication Date: 2011-08-10
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
[0003] However, if the above timing requirements are not followed, the internal logic of the main chip will be confused, and eventually the computer will not operate normally.
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[0011] Please refer to figure 1 A preferred embodiment of the timing control circuit of the present invention includes a switch circuit 20 , a power supply circuit 30 , a plurality of motherboard components 40 and a main chip 50 . In this embodiment, the motherboard component 40 is a memory, a graphics card, etc., and the main chip 50 is a CPU (Central Processing Unit, central processing unit), a South Bridge chip or a Super I / O chip.
[0012] The switch circuit 20 includes two field effect transistors Q1, Q2. The gate of the field effect transistor Q1 is connected to a power terminal PR. The source of the field effect transistor Q1 is grounded. The drain of the field effect transistor Q1 is connected to the power supply V1 through the resistor R1, and also connected to the gate of the field effect transistor Q2. The source of the field effect transistor Q2 is grounded. The drain of the field effect transistor Q2 is connected to the power supply V2 through the resistor R2 ...
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A time sequence control circuit comprises a switch circuit, a power supply circuit, at least one main board component and a main chip, wherein the switch circuit comprises first and second electric switches; the first end of the first electric switch is connected with a power supply end; the second end of the first electric switch is grounded; the third end of the first electric switch is connected with a first power supply by a first resistor and also connected with the first end of the second electric switch; the second end of the second electric switch is grounded; the third end of the second electric switch is connected with a second power supply by a second resistor, and also connected with the power supply state signal pin of the power supply circuit and the power supply state signal input pin of the main chip; the enabling pin of the power supply circuit is connected with the power supply end; the power supply state signal pin of the power supply circuit is connected with the power supply state signal input pin of the main chip, and also connected with a node between the second resistor and the third end of the second electric switch; the power supplying pin of the power supply circuit is connected with the power supply pin of the main board component. The time sequence control circuit disclosed by the invention can satisfy the time sequence requirements of computer main boards.
Description
technical field [0001] The invention relates to a timing control circuit, in particular to a timing control circuit suitable for computer mainboards. Background technique [0002] With the rapid development of electronic technology, the industry puts forward various requirements for the timing of computer motherboards. For example, in the timing requirements of a motherboard, when the computer is turned on and the power circuit receives a high-level enable signal, the The voltage of the motherboard component specification, and then output a high-level power state signal to the main chip, such as the south bridge chip. [0003] However, if the above timing requirements are not followed, the internal logic of the main chip will be confused, and eventually the computer will not operate normally. Contents of the invention [0004] In view of the above, it is necessary to provide a timing control circuit capable of accurately controlling the timing of the mainboard of the comp...
Claims
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IPC IPC(8): G06F1/04
CPCG06F1/26
Inventor 潘爱裕赖超荣夏敬立
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD