Power-on circuit for AMD desktop computer mainboard

Abstract

The power-on circuit used for the AMD desktop computer mainboard comprises a mainboard chip with a power-on time sequence function, an ATX power supply and a conduction circuit, the conduction circuit comprises a first conduction circuit and a second conduction circuit, the second conduction circuit is cut off when the first conduction circuit is conducted, and the first conduction circuit is connected with the ATX power supply. Or when the second conduction line is conducted, the first conduction line is cut off, the first conduction line is used for sending a first high-level signal for driving the ATX power supply to supply power to the mainboard chip to the mainboard chip under the condition that the first conduction line is conducted, and the mainboard chip outputs a control signal for starting the ATX power supply according to the received first high-level signal. The mainboard chip converts the started ATX power supply into the needed mainboard power supply, the power-on time sequence of the mainboard chip can be met under the condition that no central processing unit exists, and large-scale detection of mass-produced mainboards is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic equipment, and in particular relates to a power-on circuit for an AMD desktop motherboard. Background Art

[0002] Previous desktop AMD platform motherboard chips did not support powering on without a CPU, making it impossible to safely measure motherboard voltage, which was not conducive to large-scale motherboard quality testing.

[0003] In the prior art, the ATX power supply is modified so that the ATX power supply directly generates different voltages to supply the motherboard, thereby achieving the purpose of measuring the motherboard power supply voltage. However, the normal power-on timing of the motherboard chip is not met, and some motherboard power supplies and detection circuits controlled by special signals still cannot work normally.

[0004] Based on the above reasons, it is urgent to design a power-on circuit for an AMD desktop motherboard that solves the above problems. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a power-on circuit for an AMD desktop motherboard, which can meet the power-on timing of the motherboard chip and is convenient for large-scale testing of mass-produced motherboards.

[0006] The utility model is implemented as follows: a power-on circuit for an AMD desktop motherboard, comprising:

[0007] Mainboard chip with power-on timing function;

[0008] ATX power supply, used to provide power to the motherboard chip;

[0009] The conduction circuit includes a first conduction circuit and a second conduction circuit. When the first conduction circuit is turned on, the second conduction circuit is turned off, or when the second conduction circuit is turned on, the first conduction circuit is turned off. When the first conduction circuit is turned on, it is used to send a first high-level signal to the motherboard chip to drive the ATX power supply to supply power to the motherboard chip. The motherboard chip outputs a control signal to start the ATX power supply according to the received first high-level signal, and the motherboard chip converts the started ATX power supply into the required motherboard power supply.

[0010] Furthermore, the power-on circuit further comprises:

[0011] The central processing unit controls the second conducting line to conduct and outputs a second high-level signal according to the instruction signal sent by the mainboard chip. The mainboard chip outputs a control signal for starting the ATX power supply according to the received second high-level signal. The mainboard chip converts the started ATX power supply into the required mainboard power supply.

[0012] Furthermore, the central processing unit is also used to detect whether the ATX power supply supplies power to the mainboard chip. When the central processing unit detects that the ATX power supply supplies power to the mainboard chip, it sends a normal power supply confirmation signal to the mainboard chip.

[0013] Furthermore, the power-on circuit further comprises:

[0014] A power button is used to send a power-on signal to the motherboard chip. After powering on, the first conductive circuit is used to send a first high-level signal to the motherboard chip to drive the ATX power supply to supply power to the motherboard chip, or

[0015] The mainboard chip sends a command signal to the central processing unit according to the received power-on signal.

[0016] Specifically, the power-on signal is a PAN_SW-signal, and the command signal is a S10_PWRBTN_L signal.

[0017] Specifically, the first conducting circuit includes: a first MOS tube and a second MOS tube arranged in parallel, the gates of the first MOS tube and the second MOS tube are connected to the output end of the ATX power supply through a first pull-up resistor, the drain of the first MOS tube is connected to the output end of the ATX power supply through a second pull-up resistor, and the source of the first MOS tube is connected to the first input pin of the motherboard chip;

[0018] The drain of the second MOS tube is connected to the output end of the ATX power supply through a third pull-up resistor, and the source of the second MOS tube is connected to the second input pin of the motherboard chip;

[0019] The first MOS tube and the second MOS tube are in a conducting state and output the first high level signal when the first pull-up resistor, the second pull-up resistor and the third pull-up resistor are pulled up, and the first input pin and the second input pin of the motherboard chip output a control signal for starting the ATX power supply according to the received first high level signal.

[0020] Specifically, the first input pin is a SUSC pin, and the second input pin is a SUSB pin.

[0021] Specifically, the second conduction circuit includes a third MOS tube, the gate of the third MOS tube is respectively connected to the output end of the central processing unit and one end of the fourth pull-up resistor, the other end of the fourth pull-up resistor is grounded, the drain of the third MOS tube is electrically connected to the output end of the ATX power supply, the source of the third MOS tube is grounded, the output end of the central processing unit outputs a second high level signal to the third MOS tube, and the gate and source of the third MOS tube are conductively connected to ground to form a loop.

[0022] Specifically, the output end of the central processing unit is the APU_Sosket pin.

[0023] The utility model provides a power-on circuit for an AMD desktop motherboard, comprising a motherboard chip with a power-on timing function, an ATX power supply and a conduction circuit, wherein the conduction circuit comprises a first conduction circuit and a second conduction circuit, wherein the first conduction circuit is turned on and the second conduction circuit is turned off, or the second conduction circuit is turned on and the first conduction circuit is turned off, and the first conduction circuit is used to send a first high-level signal to the motherboard chip to drive the ATX power supply to supply power to the motherboard chip when the first conduction circuit is turned on, and the motherboard chip outputs a control signal for starting the ATX power supply according to the received first high-level signal, and the motherboard chip converts the started ATX power supply into a required motherboard power supply, and can meet the power-on timing of the motherboard chip in the absence of a central processing unit, so as to facilitate large-scale detection of mass-produced motherboards. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The utility model is a block diagram of a power-on circuit for an AMD desktop motherboard provided by an embodiment of the utility model without a central processing unit.

[0026] Figure 2 The utility model provides a block diagram of a power-on circuit including a central processing unit for an AMD desktop motherboard according to an embodiment of the utility model.

[0027] Figure 3 The utility model is provided in the embodiment of the present invention, which is a circuit schematic diagram of a power-on circuit for an AMD desktop motherboard.

[0028] Figure 4 The utility model is provided in the embodiment of the mainboard chip of the power-on circuit for AMD desktop mainboard.

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or state relationships based on the positions or state relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific position, or to be constructed and operated in a specific position.

[0031] In addition, some of the above terms may be used to express other meanings in addition to indicating a position or state relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0032] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components, which may be the same or different in specific types and configurations, and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0035] Power-on: After pressing the power button of the motherboard chip, all power supplies of the motherboard chip are turned on in sequence.

[0036] ATX power supply: an external power supply for desktop computers, which supplies different voltages to the motherboard chip. When the motherboard chip is not powered on, it only supplies part of the voltage power. The motherboard chip needs to be triggered to supply all the voltage power.

[0037] Motherboard power supply: ATX power supply cannot provide it directly, and the required motherboard power supply needs to be converted by the motherboard chip.

[0038] Mainboard chip: The key device for powering on the mainboard chip, including the power-on timing of some mainboard chips.

[0039] like Figure 1 and Figure 2 As shown, the embodiment of the utility model provides a power-on circuit for an AMD desktop motherboard, comprising:

[0040] The mainboard chip 100 has a power-on timing function;

[0041] ATX power supply 200, used to provide power to the motherboard chip 100, the power supply voltage is + / -12V, 5V and 3V;

[0042] The conduction circuit includes a first conduction circuit 300 and a second conduction circuit 400. When the first conduction circuit 300 is turned on, the second conduction circuit 400 is turned off, or when the second conduction circuit 400 is turned on, the first conduction circuit 300 is turned off. When the first conduction circuit 300 is turned on, it is used to send a first high-level signal to the motherboard chip 100 to drive the ATX power supply 200 to supply power to the motherboard chip 100. The motherboard chip 100 outputs a control signal to start the ATX power supply 200 according to the received first high-level signal. The motherboard chip 100 converts the started ATX power supply 200 into a required motherboard power supply 500, such as 2.5V, 1.8V, 1.1V and 0.75V. In the absence of a central processor 600, the power-on timing of the motherboard chip 100 can be met, which is convenient for large-scale testing of mass-produced motherboards.

[0043] The first conductive circuit 300 includes a first pull-up unit, and the first pull-up unit is used to pull up the input voltage of the first conductive circuit 300 to put the first conductive circuit 300 in a conductive state.

[0044] Furthermore, the power-on circuit further comprises:

[0045] The central processing unit 600 controls the second conducting line 400 to conduct and output a second high-level signal according to the command signal sent by the mainboard chip 100. The mainboard chip 100 outputs a control signal to start the ATX power supply 200 according to the received second high-level signal. The mainboard chip 100 converts the started ATX power supply 200 into the required mainboard power supply 500. In the presence of the central processing unit 600, the power-on timing of the mainboard chip 100 can be met, which is convenient for large-scale testing of mass-produced mainboard chips 100.

[0046] Furthermore, the central processor 600 is also used to detect whether the ATX power supply 200 supplies power to the motherboard chip 100. When the central processor 600 detects that the ATX power supply 200 supplies power to the motherboard chip 100 normally, it sends a normal power supply confirmation signal to the motherboard chip 100.

[0047] In the present invention, a detachable connection is adopted between the central processing unit 600 and the second conducting circuit 400, preferably a slot and plug connection, which is simple to disassemble and convenient to install.

[0048] The second conductive circuit 400 includes a second pull-up unit. After receiving a control signal output by the central processor 600, the second pull-up unit 400 pulls up the input voltage of the second conductive circuit 400 to put the second conductive circuit 400 in a conductive state.

[0049] Furthermore, the power-on circuit further comprises:

[0050] The power button 700 is used to send a power-on signal to the motherboard chip 100. After the motherboard chip 100 is turned on, the first conductive circuit 300 is used to send a first high-level signal to the motherboard chip 100 to drive the ATX power supply 200 to supply power to the motherboard chip 100, or

[0051] The mainboard chip 100 sends a command signal to the central processing unit 600 according to the received power-on signal.

[0052] Specifically, the power-on signal is a PAN_SW-signal, and the command signal is a SIO_PWRBTN_L signal.

[0053] like Figure 3 and Figure 4 As shown, specifically, the first conducting circuit 300 includes: two first MOS transistors 310 and second MOS transistors 320 arranged in parallel, the gates G of the first MOS transistors 310 and the second MOS transistors 320 are both connected to the output end of the ATX power supply 200 through a first pull-up resistor 330, the drain D of the first MOS transistor 310 is connected to the output end of the ATX power supply 200 through a second pull-up resistor 340, and the source S of the first MOS transistor 310 is connected to the first input pin 110 of the motherboard chip 100;

[0054] The drain electrode D of the second MOS tube 320 is connected to the output end of the ATX power supply 200 through the third pull-up resistor 350 , and the source electrode S of the second MOS tube 320 is connected 120 to the second input pin of the motherboard chip 100 ;

[0055] The first MOS tube 310 and the second MOS tube 320 are in a conducting state and output the first high level signal when the first pull-up resistor 330, the second pull-up resistor 340 and the third pull-up resistor 350 are pulled up, and the first input pin 110 and the second input pin 120 of the motherboard chip 100 output a control signal to start the ATX power supply 200 according to the received first high level signal, wherein the first pull-up resistor 330, the second pull-up resistor 340 and the third pull-up resistor 350 are pulled up to form a first pull-up unit.

[0056] Specifically, the first input pin 110 is a SUSC pin, and the second input pin 120 is a SUSB pin.

[0057] Specifically, the second conducting circuit 400 includes a third MOS tube 410, a gate G of the third MOS tube 410 is respectively connected to the output end of the central processing unit 600 and one end of a fourth pull-up resistor 420, the other end of the fourth pull-up resistor 420 is grounded, a drain D of the third MOS tube 410 is electrically connected to the output end of the ATX power supply 200, a source S of the third MOS tube 410 is grounded, the output end of the central processing unit outputs a second high level signal to the gate G of the third MOS tube 410, the gate D of the third MOS tube 410 and the source S are connected to the ground to form a loop, wherein the fourth pull-up resistor 420 forms a second pull-up unit.

[0058] Specifically, the output end of the central processing unit 600 is the APU_Socket pin.

[0059] In this embodiment, the gate D of the third MOS transistor 410 is connected to the gate G of the first MOS transistor 310 and the second MOS transistor 320 respectively, and they share an output end of the ATX power supply 200. The gate D of the third MOS transistor 410 is connected to the source S and grounded to form a loop. The gate G of the first MOS transistor 310 and the second MOS transistor 320 has no supply current and is therefore not conducting.

[0060] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A power-on circuit for an AMD desktop motherboard, characterized in that: include: Mainboard chip with power-on timing function; ATX power supply, used to provide power to the motherboard chip; The conduction circuit includes a first conduction circuit and a second conduction circuit. When the first conduction circuit is turned on, the second conduction circuit is turned off, or when the second conduction circuit is turned on, the first conduction circuit is turned off. When the first conduction circuit is turned on, it is used to send a first high-level signal to the motherboard chip to drive the ATX power supply to supply power to the motherboard chip. The motherboard chip outputs a control signal to start the ATX power supply according to the received first high-level signal, and the motherboard chip converts the started ATX power supply into the required motherboard power supply.

2. The power-on circuit for an AMD desktop motherboard according to claim 1, characterized in that: The first conductive circuit includes a first pull-up unit, and the first pull-up unit is used to pull up the input voltage of the first conductive circuit to put the first conductive circuit in a conductive state.

3. The power-on circuit for an AMD desktop motherboard according to claim 1, characterized in that: include: The central processing unit controls the second conducting line to conduct and outputs a second high-level signal according to the instruction signal sent by the mainboard chip. The mainboard chip outputs a control signal for starting the ATX power supply according to the received second high-level signal. The mainboard chip converts the started ATX power supply into the required mainboard power supply.

4. The power-on circuit for an AMD desktop motherboard according to claim 3, characterized in that: The second conductive circuit includes a second pull-up unit. After receiving the control signal from the central processing unit, the second pull-up unit pulls up the input voltage of the second conductive circuit to put the second conductive circuit in a conductive state.

5. The power-on circuit for an AMD desktop motherboard according to claim 3, characterized in that: The central processing unit is also used to detect whether the ATX power supply supplies power to the mainboard chip. When the central processing unit detects that the ATX power supply supplies power to the mainboard chip, it sends a confirmation signal of normal power supply to the mainboard chip.

6. The power-on circuit for an AMD desktop motherboard according to claim 3, characterized in that: Also includes: A power button is used to send a power-on signal to the motherboard chip. After powering on, the first conductive circuit is used to send a first high-level signal to the motherboard chip to drive the ATX power supply to supply power to the motherboard chip, or The mainboard chip sends a command signal to the central processing unit according to the received power-on signal.

7. The power-on circuit for an AMD desktop motherboard according to claim 6, characterized in that: The power-on signal is a PAN_SW-signal, and the command signal is a SIO_PWRBTN_L signal.

8. The power-on circuit for an AMD desktop motherboard according to claim 1, characterized in that: The first conducting circuit includes: a first MOS tube and a second MOS tube connected in parallel, the gates of the first MOS tube and the second MOS tube are connected to the output end of the ATX power supply through a first pull-up resistor, the drain of the first MOS tube is connected to the output end of the ATX power supply through a second pull-up resistor, and the source of the first MOS tube is connected to the first input pin of the motherboard chip; The drain of the second MOS tube is connected to the output end of the ATX power supply through a third pull-up resistor, and the source of the second MOS tube is connected to the second input pin of the motherboard chip; The first MOS tube and the second MOS tube are in a conducting state and output the first high level signal when the first pull-up resistor, the second pull-up resistor and the third pull-up resistor are pulled up, and the first input pin and the second input pin of the motherboard chip output a control signal for starting the ATX power supply according to the received first high level signal, wherein the first pull-up resistor, the second pull-up resistor and the third pull-up resistor are pulled up to form a first pull-up unit.

9. The power-on circuit for an AMD desktop motherboard according to claim 8, characterized in that: The first input pin is a SUSC pin, and the second input pin is a SUSB pin.

10. The power-on circuit for AMD desktop motherboard according to claim 3, characterized in that: The second conduction circuit includes a third MOS tube, the gate of the third MOS tube is respectively connected to the output end of the central processing unit and one end of the fourth pull-up resistor, the other end of the fourth pull-up resistor is grounded, the drain of the third MOS tube is electrically connected to the output end of the ATX power supply, the source of the third MOS tube is grounded, the output end of the central processing unit outputs a second high level signal of the third MOS tube, the gate and source of the third MOS tube are connected to ground, wherein the fourth pull-up resistor forms a second pull-up unit.

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