Patent Application
20160291661
This application claims priority to Chinese Patent Application No. 201510147063.4 filed on Mar. 31, 2015, the contents of which are incorporated by reference herein in its entirety.
The subject matter herein generally relates to an information clearing system.
In electronics and particularly in computer electronics, jumpers are typically used to set up or adjust printed circuit boards, such as the motherboards of computers. Jumpers are often used on a motherboard to maintain power supply to a south bridge thus safeguarding stored complementary metal-oxide-semiconductor (CMOS) information. Further, the jumpers may be moved to invoke a function to clear the CMOS information in the south bridge, and reset the basic input output system (BIOS) configuration settings, which allows the computer to boot if a recent BIOS setting made it unable to boot, or if the CMOS boot password was forgotten. A button cell is fixed on the motherboard and provides power supply for the south bridge when an external power supply is cut off. When the south bridge needs to clear the CMOS information, the button cell needs to be disassembled from the motherboard.
Implementations of the present technology will now be described, by way of example only, with reference to the attached figures.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure.
Several definitions that apply throughout this disclosure will now be presented.
The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently connected or releasably connected. The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like. “Unit” means a collection of electronic hardware alone or in combination with software configured for a particular task or function, although units may overlap or share components.
In at least one embodiment, the external power supply Vcc is +3.3 volts, and the internal power supply V is a button cell.
The filter unit 200 includes a second resistor R2, a first capacitor C1, and a second capacitor C2. A first terminal of the second resistor R2 is electrically coupled to the cathode c of the Schottky diode D. The first terminal of the second resistor R2 is grounded via the first capacitor C1. A second terminal of the second resistor R2 is grounded via the second capacitor C2. The second terminal of the second resistor R2 is electrically coupled to the third pin 323 of the base 320 and the south bridge chip 400 respectively.
When the system is working normally, the cap 310 is positioned on the first pin 321 and the second pin 322 of the base 320. If the power supply is turned on, the external power supply Vcc is provided to the south bridge chip 400 via the Schottky diode D and the filter unit 200. If the power supply is cut off, the external power supply Vcc cannot be provided to the south bridge chip 400, the cathode of the internal power supply V is grounded via the first pin 321 and the second pin 322 of the base 320, the internal power supply V is provided to the south bridge chip 400 via the first resistor R1, the Schottky diode D, and the filter unit 200. Therefore, the CMOS information in the south bridge chip 400 will not be lost if the power supply is cut off.
When the system malfunctions and needs to clear the CMOS information in the south bridge chip 400, the cap 310 is positioned on the second pin 322 and the third pin 323 of the base 320. If the power supply is cut off, the external power supply Vcc cannot be provided to the south bridge chip 400, the cathode of the internal power supply V cannot be grounded and is cut off, the internal power supply V cannot be provided to the south bridge chip 400, the south bridge chip 400 is grounded via the second pin 322 and the third pin 323 of the base 320. Therefore, the CMOS information in the south bridge chip 400 is absolutely cleared and the internal power supply V does not need to be disassembled from the system.
The embodiments shown and described above are only examples. Many details are often found in the art such as the other features of an information clearing system. Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, including in matters of shape, size and arrangement of the parts within the principles of the present disclosure up to, and including the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the embodiments described above may be modified within the scope of the claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201510147063.4 | Mar 2015 | CN | national |
