TWI421522B

TWI421522B - Circuit for turning on a motherboard on time

Info

Publication number: TWI421522B
Application number: TW96150154A
Authority: TW
Inventors: Jin-Liang Xiong
Original assignee: Hon Hai Prec Ind Co Ltd
Priority date: 2007-12-26
Filing date: 2007-12-26
Publication date: 2014-01-01
Also published as: TW200928405A

Description

主機板定時開機電路 Motherboard timing boot circuit

本發明係關於一種主機板開機電路。 The present invention relates to a motherboard boot circuit.

在電腦主機板研發之可靠性驗證階段，需要將主機板置於電腦系統中，進行直流開關機測試。傳統之測試方法係人工按壓電腦之電源按鍵使電腦開機，電腦開機後執行測試程式，而後透過軟體關機，然後再按壓電源按鍵使電腦開機，如此循環複數次直至達到一設定次數，以測試主機板之工作穩定性。 In the reliability verification phase of the development of the computer motherboard, the motherboard needs to be placed in the computer system for DC switch test. The traditional test method is to manually press the power button of the computer to turn on the computer. After the computer is turned on, the test program is executed, and then the software is turned off, and then the power button is pressed to turn on the computer. This is repeated several times until a set number of times is reached to test the motherboard. The stability of the work.

按壓電腦電源按鍵時，實際上係使電腦前面板連接器之第六腳與第八腳瞬間短路，使得第六腳之電位由高電平變為低電平，從而在按壓電源按鍵時產生一電平變化訊號以改變主機板之工作狀態。在進行直流開關機測試時，如此重複之人工啟動操作使得測試過程繁瑣，浪費不少人力，影響測試效率和進度。 When the computer power button is pressed, the sixth leg and the eighth leg of the front panel connector of the computer are instantaneously short-circuited, so that the potential of the sixth pin changes from a high level to a low level, thereby generating a The level change signal changes the working state of the motherboard. When performing DC switch test, such repeated manual start operation makes the test process cumbersome, wastes a lot of manpower, and affects test efficiency and progress.

鑒於以上內容，有必要提供一種主機板定時開機電路，能夠在主機板直流開關機測試過程中循環定時開機。 In view of the above, it is necessary to provide a motherboard timing start circuit, which can be cycled and turned on during the test of the DC switch of the motherboard.

一種主機板定時開機電路，包括一第一開關組、一第二開關組及一定時電路，該定時電路與一系統電源連接，該第一和第二開關組均包括一第一端、一第二端及一控制端，該第一開關組之第一端分別與一輔助電源及一電腦前面板連接器之第六腳連接，第二端與該輔助電源連接，該第一開關組在該輔助電源輸出電壓後其第一端接地使該電腦前面板連接器之第六腳拉至低電平從而使主機板啟動；該第二開關組之第一端透過該定時電路與該第一開關組之控制端連接，第二端與該輔助電源連接，控制端與該系統電源連接，該第二開關組在該系統電源停止電壓輸出後啟動該定時電路進行放電；該定時電路放電一段時間後，再次使該第一開關組之第一端接地從而使該電腦前面板連接器之第六腳再次拉至低電平而使該主機板再次啟動。 A motherboard timing starting circuit includes a first switch group, a second switch group, and a timing circuit, wherein the timing circuit is connected to a system power supply, and the first and second switch groups each include a first end and a first a second end and a control end, the first end of the first switch group is respectively connected to an auxiliary power source and a sixth leg of a computer front panel connector, and second The terminal is connected to the auxiliary power source, and the first switch group is grounded at the first end after the auxiliary power supply output voltage, so that the sixth leg of the front panel connector of the computer is pulled to a low level to activate the motherboard; the second switch The first end of the group is connected to the control end of the first switch group through the timing circuit, the second end is connected to the auxiliary power source, and the control end is connected to the system power supply, and the second switch group is after the system power stop voltage output The timing circuit is activated to discharge; after the timing circuit is discharged for a period of time, the first end of the first switch group is grounded again to pull the sixth leg of the front panel connector of the computer to the low level again to make the motherboard Start again.

上述主機板定時開機電路可在電腦電源啟動後自動啟動主機板，並在主機板關機後經過一延遲時間再次啟動主機板，完成主機板之循環定時開機，從而提高主機板直流開關機測試之測試效率。 The above-mentioned motherboard timing start circuit can automatically start the motherboard after the computer power is turned on, and after the motherboard is turned off, the host board is restarted after a delay time, and the cycle start of the motherboard is completed, thereby improving the test of the motherboard DC switch test. effectiveness.

Q1~Q4‧‧‧電子開關 Q1~Q4‧‧‧Electronic switch

H‧‧‧電腦前面板連接器 H‧‧‧Computer front panel connector

R2‧‧‧限流電阻 R2‧‧‧ current limiting resistor

C‧‧‧蓄電電容 C‧‧‧ storage capacitor

D‧‧‧二極體 D‧‧‧ diode

R1‧‧‧分壓電阻 R1‧‧‧voltage resistor

R3‧‧‧放電電阻 R3‧‧‧discharge resistor

圖1係本發明主機板定時開機電路較佳實施方式之電路圖。 1 is a circuit diagram of a preferred embodiment of a timing turn-on circuit of a motherboard of the present invention.

參考圖1，本發明主機板定時開機電路之較佳實施方式包括四個電子開關Q1~Q4、一分壓電阻R1、一限流電阻R2、一放電電阻R3、一蓄電電容C及一二極體D。該電子開關Q1和Q3為NPN電晶體，Q2和Q4為NMOS場效電晶體。 Referring to FIG. 1, a preferred embodiment of the motherboard start-up circuit of the present invention includes four electronic switches Q1~Q4, a voltage dividing resistor R1, a current limiting resistor R2, a discharging resistor R3, a storage capacitor C and a diode. Body D. The electronic switches Q1 and Q3 are NPN transistors, and Q2 and Q4 are NMOS field effect transistors.

該電子開關Q1之集極分別與一輔助電源5V_SB及一電腦前面板連接器H之第六腳6連接，射極接地，基極與該電子開關Q2之汲極連接，該電子開關Q2之汲極還透過該分壓電阻R1與該輔助電源5V_SB連接，源極接地，閘極分別透過該蓄電電容C接地及透過該放電電阻R3與該電子開關Q3之集極連接，該電子開關Q2之閘極還透過該限流電阻R2連接至該二極體D之陰極，該二極體D之陽極與一系統電源5V_SYS連接，該電子開關Q3之射極接地，基極分別與該輔助電源5V_SB及該電子開關Q4之汲極連接，該電子開關Q4之源極接地，閘極連接該系統電源5V_SYS。 The collector of the electronic switch Q1 is respectively connected to an auxiliary power source 5V_SB and a sixth leg 6 of a computer front panel connector H, the emitter is grounded, and the base is connected to the drain of the electronic switch Q2, and the electronic switch Q2 is connected. The pole is also connected to the auxiliary power source 5V_SB through the voltage dividing resistor R1, the source is grounded, the gate is grounded through the storage capacitor C and connected to the collector of the electronic switch Q3 through the discharge resistor R3, and the gate of the electronic switch Q2 is connected. The pole is also connected to the cathode of the diode D through the current limiting resistor R2, and the anode of the diode D is A system power supply 5V_SYS is connected, the emitter of the electronic switch Q3 is grounded, the base is respectively connected to the auxiliary power supply 5V_SB and the drain of the electronic switch Q4, the source of the electronic switch Q4 is grounded, and the gate is connected to the system power supply 5V_SYS.

上述電子開關Q1和Q2組成一第一開關組，該電子開關Q3和Q4組成一第二開關組，該限流電阻R2、放電電阻R3、蓄電電容C及二極體D組成一定時電路。該第一開關組在電腦電源開啟後啟動主機板，該第二開關組在該主機板關機後啟動該定時電路，該定時電路在定時結束後啟動該第一開關組以再次啟動該主機板。其具體工作工作過程如下： The electronic switches Q1 and Q2 constitute a first switch group, and the electronic switches Q3 and Q4 form a second switch group. The current limiting resistor R2, the discharge resistor R3, the storage capacitor C and the diode D constitute a certain time circuit. The first switch group starts the motherboard after the power of the computer is turned on, and the second switch group starts the timing circuit after the motherboard is turned off. The timing circuit starts the first switch group after the timing ends to start the motherboard again. The specific work process is as follows:

啟動電腦電源，測試開始，該輔助電源5V_SB供電而系統電源5V_SYS無電壓輸出，該電腦前面板連接器H之第六腳6為高電平，此時該電子開關Q2~Q4均截止，該電子開關Q1導通，將該電腦前面板連接器H之第六腳6拉至低電平，該主機板被啟動，該系統電源5V_SYS開始供電，該系統電源5V_SYS透過二極體D及限流電阻R2為蓄電電容C充電，當該蓄電電容C上之電壓達到該電子開關Q2之導通電壓後該電子開關Q2導通，使電子開關Q1截止，該前面板連接器H之第六腳6返回高電平，以上過程相當於手動按壓一次電源按鍵。隨後電腦開始執行測試程式，並在測試程式運行完畢後軟體關機。 Start the computer power supply, the test starts, the auxiliary power supply 5V_SB power supply and the system power supply 5V_SYS no voltage output, the sixth pin 6 of the front panel connector H of the computer is high level, at this time the electronic switch Q2~Q4 are all cut off, the electronic The switch Q1 is turned on, the sixth pin 6 of the front panel connector H of the computer is pulled to a low level, the motherboard is started, the system power supply 5V_SYS starts to supply power, and the system power supply 5V_SYS passes through the diode D and the current limiting resistor R2. Charging the storage capacitor C, when the voltage on the storage capacitor C reaches the conduction voltage of the electronic switch Q2, the electronic switch Q2 is turned on, so that the electronic switch Q1 is turned off, and the sixth pin 6 of the front panel connector H returns to the high level. The above process is equivalent to manually pressing the power button once. The computer then starts executing the test program and shuts down the software after the test program has finished running.

主機板關機後，該系統電源5V_SYS停止供電而輔助電源5V_SB仍保持供電，因此該電子開關Q4截止而Q3導通，此時該蓄電電容C透過該放電電阻R3及電子開關Q3放電，當該蓄電電容C上之電壓低於該電子開關Q2之導通電壓時，該電子開關Q2截止，使該電子開關Q1導通，再次將該前面板連接器H之第六腳6拉至低電平，使主機板再次開機。 After the motherboard is powered off, the system power supply 5V_SYS stops supplying power and the auxiliary power supply 5V_SB remains powered. Therefore, the electronic switch Q4 is turned off and Q3 is turned on. At this time, the storage capacitor C is discharged through the discharge resistor R3 and the electronic switch Q3, when the storage capacitor is discharged. When the voltage on C is lower than the on-voltage of the electronic switch Q2, the electronic switch Q2 is turned off, the electronic switch Q1 is turned on, and the sixth pin 6 of the front panel connector H is pulled to the low level again, so that The motherboard is powered on again.

該二極體D可避免該蓄電電容C透過該限流電阻R2向該系統電源5V_SYS放電，該放電電阻R3和蓄電電容C組成一個RC電路，因此透過調整該放電電阻R3之電阻值和蓄電電容C之電容值，即可調整該主機板定時開機電路之延遲開機時間，使該主機板定時開機電路在主機板關機一定時間後自動開機。 The diode D can prevent the storage capacitor C from being discharged to the system power supply 5V_SYS through the current limiting resistor R2. The discharge resistor R3 and the storage capacitor C form an RC circuit, thereby adjusting the resistance value and the storage capacitor of the discharge resistor R3. The capacitance value of C can adjust the delayed boot time of the motherboard startup circuit, so that the motherboard timing startup circuit automatically starts after the motherboard is turned off for a certain period of time.

綜上所述，本發明符合發明專利要件，爰依法提出專利申請。惟，以上所述者僅為本發明之較佳實施例，舉凡熟悉本案技藝之人士，在爰依本發明精神所作之等效修飾或變化，皆應涵蓋於以下之申請專利範圍內。 In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

Q1~Q4‧‧‧電子開關 Q1~Q4‧‧‧Electronic switch

H‧‧‧電腦前面板連接器 H‧‧‧Computer front panel connector

R2‧‧‧限流電阻 R2‧‧‧ current limiting resistor

C‧‧‧蓄電電容 C‧‧‧ storage capacitor

D‧‧‧二極體 D‧‧‧ diode

R1‧‧‧分壓電阻 R1‧‧‧voltage resistor

R3‧‧‧放電電阻 R3‧‧‧discharge resistor

Claims

一種主機板定時開機電路，包括一第一開關組、一第二開關組及一定時電路，該定時電路與一系統電源連接，該第一和第二開關組均包括一第一端、一第二端及一控制端，該第一開關組之第一端分別與一輔助電源及一電腦前面板連接器之第六腳連接，第二端與該輔助電源連接，該第一開關組在該輔助電源輸出電壓後其第一端接地使該電腦前面板連接器之第六腳拉至低電平從而使主機板啟動；該第二開關組之第一端透過該定時電路與該第一開關組之控制端連接，第二端與該輔助電源連接，控制端與該系統電源連接，該第二開關組在該系統電源停止電壓輸出後啟動該定時電路進行放電；該定時電路放電一段時間後，再次使該第一開關組之第一端接地從而使該電腦前面板連接器之第六腳再次拉至低電平而使該主機板再次啟動。 A motherboard timing starting circuit includes a first switch group, a second switch group, and a timing circuit, wherein the timing circuit is connected to a system power supply, and the first and second switch groups each include a first end and a first a second end and a control end, wherein the first end of the first switch group is respectively connected to an auxiliary power source and a sixth leg of a computer front panel connector, and the second end is connected to the auxiliary power source, wherein the first switch group is After the auxiliary power output voltage is applied, the first end of the second grounding of the front panel connector of the computer is pulled to a low level to activate the motherboard; the first end of the second switch group is passed through the timing circuit and the first switch The control end of the group is connected, the second end is connected to the auxiliary power source, and the control end is connected to the system power supply, and the second switch group starts the timing circuit to discharge after the system power stop voltage output; the timing circuit is discharged after a period of time The first end of the first switch group is grounded again to pull the sixth leg of the front panel connector of the computer to a low level again to activate the motherboard.

如申請專利範圍第1項所述之主機板定時開機電路，其中該第一開關組包括一第一電子開關及一第二電子開關，該第一和第二電子開關均包括一第一端、一第二端及一控制端；該第一電子開關之第一端作為該第一開關組之第一端，第二端接地，控制端與該第二電子開關之第一端連接作為該第一開關組之第二端；該第二電子開關之第二端接地，控制端作為該第一開關組之控制端。 The motherboard timing start circuit of claim 1, wherein the first switch group includes a first electronic switch and a second electronic switch, and the first and second electronic switches each include a first end, a second end and a control end; the first end of the first electronic switch serves as a first end of the first switch group, the second end is grounded, and the control end is coupled to the first end of the second electronic switch as the first end a second end of the switch group; the second end of the second electronic switch is grounded, and the control end serves as a control end of the first switch group.

如申請專利範圍第2項所述之主機板定時開機電路，其中該第二開關組包括一第三電子開關及一第四電子開關，該第三和第四電子開關均包括一第一端、一第二端及一控制端；該第三電子開關之第一端作為該第二開關組之第一端，第二端接地，控制端作為該第二開關組之第二端與該第四電子開關之第一端及該輔助電壓連接；該第四電子開關之第二端接地，控制端作為該第二開關組之控制端。 The motherboard timing start circuit of claim 2, wherein the second switch group comprises a third electronic switch and a fourth electronic switch, the third and fourth electronic switches each comprise a first end, a second end and a control end; the first end of the third electronic switch serves as a first end of the second switch group, the second end is grounded, and the control end serves as a second end of the second switch group and the fourth end The first end of the electronic switch is connected to the auxiliary voltage; the second end of the fourth electronic switch is grounded The control end serves as a control end of the second switch group.

如申請專利範圍第3項所述之主機板定時開機電路，其中該定時電路包括一二極體、一限流電阻、一放電電阻及一蓄電電容，該二極體之陽極與該系統電源連接，陰極依次透過該限流電阻和該蓄電電容接地，該第二開關組之第一端透過該放電電阻連接於該限流電阻和該蓄電電容之間，該第一開關組之控制端連接於該限流電阻和該蓄電電容之間。 The motherboard timing turn-on circuit according to claim 3, wherein the timing circuit comprises a diode, a current limiting resistor, a discharge resistor and a storage capacitor, and the anode of the diode is connected to the system power supply. The cathode is sequentially connected to the current limiting resistor and the storage capacitor is grounded. The first end of the second switch group is connected between the current limiting resistor and the storage capacitor through the discharge resistor, and the control end of the first switch group is connected to Between the current limiting resistor and the storage capacitor.

如申請專利範圍第4項所述之主機板定時開機電路，其中該第一和第三電子開關均為NPN電晶體，其第一、第二及控制端分別為集極、射極及基極；該第二和第四電子開關均為NMOS場效電晶體，其第一、第二及控制端分別為汲極、源極及閘極。 The motherboard timing start circuit as claimed in claim 4, wherein the first and third electronic switches are NPN transistors, and the first, second and control ends are respectively a collector, an emitter and a base. The second and fourth electronic switches are all NMOS field effect transistors, and the first, second and control ends are respectively a drain, a source and a gate.

如申請專利範圍第4項所述之主機板定時開機電路，其中該定時電路放電一段時間的時間長度由該放電電阻和蓄電電容組成之RC電路確定。 The motherboard timing start circuit as claimed in claim 4, wherein the timing circuit discharges for a period of time is determined by an RC circuit composed of the discharge resistor and the storage capacitor.

如申請專利範圍第1項所述之主機板定時開機電路，其中該定時電路包括一二極體、一限流電阻、一放電電阻及一蓄電電容，該二極體之陽極與該系統電源連接，陰極依次透過該限流電阻和該蓄電電容接地，該第二開關組之第一端透過該放電電阻連接於該限流電阻和該蓄電電容之間，該第一開關組之控制端連接於該限流電阻和該蓄電電容之間。 The motherboard timing start circuit according to claim 1, wherein the timing circuit comprises a diode, a current limiting resistor, a discharging resistor and a storage capacitor, and the anode of the diode is connected to the system power supply. The cathode is sequentially connected to the current limiting resistor and the storage capacitor is grounded. The first end of the second switch group is connected between the current limiting resistor and the storage capacitor through the discharge resistor, and the control end of the first switch group is connected to Between the current limiting resistor and the storage capacitor.

如申請專利範圍第7項所述之主機板定時開機電路，其中該定時電路放電一段時間的時間長度由該放電電阻和蓄電電容組成之RC電路確定。 For example, the motherboard timing start circuit described in claim 7 is characterized in that the time length of the timing circuit being discharged for a period of time is determined by an RC circuit composed of the discharge resistor and the storage capacitor.