CN110928389B - Circuit for automatically starting up loongson mainboard after power-on - Google Patents
Circuit for automatically starting up loongson mainboard after power-on Download PDFInfo
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- CN110928389B CN110928389B CN201911084444.7A CN201911084444A CN110928389B CN 110928389 B CN110928389 B CN 110928389B CN 201911084444 A CN201911084444 A CN 201911084444A CN 110928389 B CN110928389 B CN 110928389B
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- mos tube
- diode
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- resistor
- mainboard
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
A kind of dragon core mainboard is electrified and started automatically, after the ATX power is electrified, its 3P3V \STBYis electrified directly, charge the electric capacity I after the resistance I, the MOS tube I is conducted after T time delay, the MOS tube II is cut off, thus the current enters the RC differential circuit formed by resistance III and electric capacity II, the RC differential circuit has current output in T time, thus make MOS tube III conduct, after MOS tube III conducts, the mainboard ACPI _ PWTNRBN pin is pulled down, the system begins to power up automatically after detecting the falling edge signal, the mainboard begins to start automatically, thus has realized the function of the power-on automatic start-up of dragon core 3A3000 processor mainboard. And after t, the RC differential circuit does not output, at the moment, the MOS tube III is cut off, and the ACPI _ PWRBTNN pin is pulled high by a pull-up resistor in the mainboard again to prepare for starting the mainboard later.
Description
Technical Field
The invention relates to the technical field of computer mainboard power supply, in particular to a circuit for automatically starting up a Loongson mainboard after being powered on.
Background
According to the technical manual of the Loongson processor, when a computer adopting the Loongson processor is started, a power-on signal of a bridge chip is used for controlling a starting-up signal through a BUFFER, and the automatic starting-up function can also be realized.
Disclosure of Invention
In order to overcome the defects of the technology, the invention provides a point circuit which can control the startup of a Loongson mainboard after an ATX power supply is powered on.
The technical scheme adopted by the invention for overcoming the technical problems is as follows:
a kind of loongson mother board powers on the circuit of the automatic start-up, including:
the grid of the MOS tube I is connected with the end of a 3P3V _STBYof a power supply on the main board through a resistor I, the drain electrode of the transistor is connected to a 3P3V _STBYend of a power supply on the main board through a resistor II, and the source electrode of the transistor is grounded;
one end of the capacitor I is connected to the end of the 3P3V \\ STBY of the power supply on the main board and the grid electrode of the MOS tube I through the resistor I respectively, and the other end of the capacitor I is grounded;
the grid electrode of the MOS tube II is connected to the drain electrode of the MOS tube I, the drain electrode of the MOS tube II is connected to the 3P3V \\ STBY end of the power supply on the main board through a resistor III, and the source electrode of the MOS tube II is grounded; and
and one end of the capacitor II is connected to the drain electrode of the MOS tube II, the other end of the capacitor II is grounded through the resistor IV and is connected to the grid electrode of the MOS tube III, the drain electrode of the MOS tube III is connected to the ACPI _ PWRBTNN pin of the mainboard through the resistor V, and the source electrode of the MOS tube III is grounded.
In order to realize the quick discharge of the capacitor I, the high-voltage power supply further comprises a voltage stabilizing diode, wherein the voltage stabilizing diode is connected with the resistor I in parallel, the cathode of the voltage stabilizing diode is connected with a 3P3V _STBYend of a power supply on the main board, and the anode of the voltage stabilizing diode is connected with the capacitor I.
In order to prevent the backflow, the backflow prevention device further comprises a diode I, wherein the cathode of the diode I is connected to the drain electrode of the MOS tube I, and the anode of the diode I is connected to the source electrode of the MOS tube I.
In order to prevent the backflow, the device further comprises a diode II, wherein the cathode of the diode II is connected to the drain electrode of the MOS tube II, and the anode of the diode II is connected to the source electrode of the MOS tube II.
In order to prevent the backflow, the backflow prevention device further comprises a diode III, the negative electrode of the diode III is connected to the drain electrode of the MOS tube III, and the positive electrode of the diode III is connected to the source electrode of the MOS tube III.
The invention has the beneficial effects that: after an ATX power supply is powered on, A3 P3V _STBYpower supply is directly powered on, a capacitor I is charged through a resistor I, an MOS tube I is conducted after T time delay, an MOS tube II is cut off, current enters an RC differential circuit formed by a resistor III and the capacitor II, the RC differential circuit outputs current in T time, so that an MOS tube III is conducted, after the MOS tube III is conducted, a main board ACPI _ PWRBTNN pin is pulled down, the system starts to be automatically powered on after detecting a falling edge signal, the main board starts to be automatically started, and the function of automatically starting the power on of a Loongson 3A3000 processor main board is realized. After t, the RC differential circuit does not output, at the moment, the MOS tube III is cut off, and the ACPI _ PWRBTNN pin is pulled high by a pull-up resistor in the mainboard again to prepare for later mainboard starting.
Drawings
FIG. 1 is a circuit configuration diagram of the present invention;
in the figure, 1, a resistor I2, a voltage stabilizing diode 3, a capacitor I4, a MOS tube I5, a diode I6, a resistor II 7, a MOS tube II 8, a diode II 9, a resistor III 10, a capacitor II 11, a resistor IV 12, a MOS tube III 13, a diode III 14 and a resistor V.
Detailed Description
The invention is further described below with reference to fig. 1.
A kind of loongson mother board powers on the circuit of the automatic start-up, including: the MOS tube I4 is connected with the 3P3V _STBYend of the power supply on the main board through a resistor I1 at the grid electrode, is connected with the 3P3V _STBYend of the power supply on the main board through a resistor II 6 at the drain electrode, and is grounded at the source electrode; one end of the capacitor I3 is connected to a 3P3V _STBYend of a power supply on the main board and a grid electrode of the MOS tube I4 through a resistor I1, and the other end of the capacitor I3 is grounded;
the grid electrode of the MOS tube II 7 is connected to the drain electrode of the MOS tube I4, the drain electrode of the MOS tube II is connected to the end of the 3P3V \ STBY of the power supply on the main board through a resistor III 9, and the source electrode of the MOS tube II is grounded; and one end of the capacitor II 10 is connected to the drain electrode of the MOS transistor II 7, the other end of the capacitor II is grounded through the resistor IV 11 and is connected to the grid electrode of the MOS transistor III 12, the drain electrode of the MOS transistor III 12 is connected to the ACPI _ PWRBTNN pin of the main board through the resistor V14, and the source electrode of the MOS transistor III 12 is grounded. After an ATX power supply is powered on, A3 P3V _STBYpower supply is directly powered on, a capacitor I3 is charged through a resistor I1, an MOS tube I4 is switched on after T time delay, an MOS tube II 7 is switched off, so that current enters an RC differential circuit formed by a resistor III 9 and a capacitor II 10, the RC differential circuit has current output at T time, so that an MOS tube III 12 is switched on, after the MOS tube III 12 is switched on, a main board ACPI _ PWRBTNN pin is pulled down, a signal of the ACPI _ PWRBTNN pin controls the on-off of the main board, the low level is effective, the system starts automatic power-on after detecting a falling edge signal, the main board starts automatic power-on, and the power-on automatic power-on function of the main board of the Loongson 3A3000 processor is realized. After t, the RC differential circuit does not output, at the moment, the MOS tube III is cut off, and the ACPI _ PWRBTNN pin is pulled high by a pull-up resistor in the mainboard again to prepare for later mainboard starting.
If T =500ms, it is experimentally verified that the resistor i 1 is selected to be 162KR and the capacitor i 3 is selected to be 22uf, and then the RC differentiating circuit has an output in 100 ms.
Example 1:
preferably, the power supply further comprises a voltage stabilizing diode 2, wherein the voltage stabilizing diode 2 is connected with the resistor I1 in parallel, the cathode of the voltage stabilizing diode 2 is connected with the end of the power supply on the main board, namely the 3P3V _STBYend, and the anode of the voltage stabilizing diode 2 is connected with the capacitor I3. The zener diode 2 can rapidly discharge the capacitor i 3.
Example 2:
further, the diode I5 is further included, the cathode of the diode I5 is connected to the drain electrode of the MOS transistor I4, and the anode of the diode I5 is connected to the source electrode of the MOS transistor I4. Diode I5 can make the one-way drain electrode that flows to MOS pipe I4 of source electrode from MOS pipe I4 of electric current, prevents that the reverse drain electrode that flows to MOS pipe I4 from electric current from the source electrode of MOS pipe I4.
Example 3:
the diode II 8 is further included, the cathode of the diode II is connected to the drain electrode of the MOS tube II 7, and the anode of the diode II is connected to the source electrode of the MOS tube II 7. Diode II 8 can make the current unidirectional flow to the drain electrode of MOS pipe II 7 from the source electrode of MOS pipe II 7, prevents that the current from backward flowing to the source electrode of MOS pipe II 7 from the drain electrode of MOS pipe II 7.
Example 4:
the diode III 13 is also included, the cathode of the diode is connected with the drain electrode of the MOS tube III 12, and the anode of the diode is connected with the source electrode of the MOS tube III 12. Diode III 13 can make current flow from source of MOS transistor III 12 to drain of MOS transistor III 12 in one direction, and prevent current from reversely flowing from drain of MOS transistor III 12 to source of MOS transistor III 12.
Claims (4)
1. A kind of loongson mother board powers on the circuit of the automatic start-up, characterized by that, comprising:
the MOS tube I (4) is connected with the 3P3V _STBYend of the power supply on the main board through a resistor I (1), the drain electrode of the MOS tube I is connected with the 3P3V _STBYend of the power supply on the main board through a resistor II (6), and the source electrode of the MOS tube I is grounded;
one end of the capacitor I (3) is connected to a 3P3V _STBYend of a power supply on the main board and a grid electrode of the MOS tube I (4) through a resistor I (1), and the other end of the capacitor I (3) is grounded;
the grid electrode of the MOS tube II (7) is connected to the drain electrode of the MOS tube I (4), the drain electrode of the MOS tube II is connected to the 3P3V _STBYend of the power supply on the main board through a resistor III (9), and the source electrode of the MOS tube II is grounded; and
one end of the capacitor II (10) is connected to the drain electrode of the MOS transistor II (7), the other end of the capacitor II is grounded through a resistor IV (11) and is connected to the grid electrode of the MOS transistor III (12), the drain electrode of the MOS transistor III (12) is connected to the ACPI _ PWRBTNN pin of the main board through a resistor V (14), and the source electrode of the MOS transistor III (12) is grounded;
the power supply further comprises a voltage stabilizing diode (2), the voltage stabilizing diode (2) is connected with the resistor I (1) in parallel, the cathode of the voltage stabilizing diode is connected to the end, on the main board, of the resistor 3P3V \\ STBY, and the anode of the voltage stabilizing diode is connected to the capacitor I (3).
2. The power-on auto-start circuit of the Loongson mainboard according to claim 1, wherein: the diode I (5) is further included, the cathode of the diode I (5) is connected to the drain electrode of the MOS tube I (4), and the anode of the diode I (5) is connected to the source electrode of the MOS tube I (4).
3. The power-on auto-start circuit of the Loongson mainboard according to claim 1, wherein: the diode II (8) is further included, the cathode of the diode II is connected to the drain electrode of the MOS tube II (7), and the anode of the diode II is connected to the source electrode of the MOS tube II (7).
4. The power-on auto-start circuit of the Loongson mainboard according to claim 1, wherein: the diode III (13) is also included, the cathode of the diode is connected with the drain electrode of the MOS tube III (12), and the anode of the diode is connected with the source electrode of the MOS tube III (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911084444.7A CN110928389B (en) | 2019-11-08 | 2019-11-08 | Circuit for automatically starting up loongson mainboard after power-on |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911084444.7A CN110928389B (en) | 2019-11-08 | 2019-11-08 | Circuit for automatically starting up loongson mainboard after power-on |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110928389A CN110928389A (en) | 2020-03-27 |
| CN110928389B true CN110928389B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911084444.7A Active CN110928389B (en) | 2019-11-08 | 2019-11-08 | Circuit for automatically starting up loongson mainboard after power-on |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204028765U (en) * | 2014-08-20 | 2014-12-17 | 深圳市康士达科技有限公司 | A kind of booting computer circuit |
| CN107425835B (en) * | 2016-05-23 | 2023-01-17 | 中兴通讯股份有限公司 | Startup and shutdown circuit |
| CN207037594U (en) * | 2017-07-05 | 2018-02-23 | 深圳市深之蓝科技有限公司 | A kind of equipment for realizing Auto Power On |
| CN207124616U (en) * | 2017-08-04 | 2018-03-20 | 深圳市宇芯数码技术有限公司 | Charge intelligent switch machine control circuit |
| CN110333768A (en) * | 2019-07-02 | 2019-10-15 | 昆山嘉提信息科技有限公司 | Self-start circuit is powered on for mainboard |
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2019
- 2019-11-08 CN CN201911084444.7A patent/CN110928389B/en active Active
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| CN110928389A (en) | 2020-03-27 |
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Address after: 250000 No. 2877 Kehang Road, Suncun Town, Jinan High-tech District, Shandong Province Applicant after: Chaoyue Technology Co.,Ltd. Address before: 250014 no.2877 Kehang Road, Suncun Town, high tech Zone, Jinan City, Shandong Province Applicant before: SHANDONG CHAOYUE DATA CONTROL ELECTRONICS Co.,Ltd. |
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