TWM455895U - Power up and down device of real time clock chip of computer motherboard - Google Patents

Description

Power-off device for instant clock chip for computer motherboard

The present invention relates to a circuit device for a computer motherboard, and more particularly to a power-off device for an instant clock chip for a computer motherboard.

Some conventional computer motherboards must remove the battery power on the motherboard or remove the RTC_RESET jumper after removing the computer chassis to clear the CMOS register in the RTC chip. This obviously brings the disadvantage of being difficult to repair. Other conventional computer motherboards will remove the jumper of the CMOS register in the RTC chip as a push switch, and even set the push switch to the appropriate position on the rear panel of the computer motherboard. Position, in order to facilitate the user to extend from the rear of the computer case into the rear baffle, and then press the push switch, thereby clearing the data of the CMOS register in the RTC chip, which is to remove the computer The trouble of the shell, however, for the average user, it is still necessary to have the common sense of computer hardware, so that the data of the CMOS register in the RTC chip can be smoothly cleared.

In view of the lack of the above-mentioned conventional computer motherboard, the present creator has improved a power-off device for an RTC chip for a computer motherboard, and provides the user with a direct press of the power switch for a period of time. The power-off device automatically turns off the RTC chip, and achieves the purpose of clearing the data of the CMOS register in the RTC chip. The convenience of operation allows the user or maintenance personnel to The data of the CMOS register in the RTC chip can also be removed by sending back to the repair station and disassembling the computer case to reduce the probability of returning to the Return Materiel Authorization (RMA).

The purpose of this creation is to provide a power-off device for an instant clock chip of a computer motherboard, which can be used to clear the data of the CMOS register in the RTC chip.

In order to achieve the above object of the present invention, the present invention provides a power-off device for an instant clock chip of a computer motherboard, wherein the computer motherboard includes: a Real Time Clock (RTC) chip, a battery power supply, and a The power switch includes: a first device controlled by a second device, and electrically connected to the battery power source, and configured to control the battery power source to input a high level voltage or a voltage to the RTC chip a low level voltage; the second device is configured to receive a power switch signal from the power switch, and to determine whether the received power switch signal has continued for more than a first predetermined time, if true If the second device sends a signal to notify the third device, the standby power of the computer motherboard is turned off to supply power to the RTC chip, so that the computer motherboard enters a similar power supply completely (Deep S5), avoiding the RTC. The internal power of the chip is automatically switched to the battery power of the RTC chip to ensure the success of the subsequent operation, and then the second device sends a signal to notify the first device. , So that the control means have a first off battery power, the RTC wafer to maintain a low level input voltage exceeds at least a second predetermined time. Provided to the user directly by the power supply After the switch is pressed for a period of time, the power-off device automatically cuts off the power supply of the RTC chip and the power supply of the constant backup power supply, thereby facilitating the removal of the data of the CMOS register in the RTC chip.

In order to enable your review committee to have a deeper understanding and understanding of the structure, features and efficacy of this creation, the preferred embodiments are described in detail with the following diagram:

See Figures 1 and 2. In order to disclose the convenience and ease of understanding of the present creation, in the first and second figures, the computer motherboard 10 only draws hardware components directly related to the present creation, but belongs to other components of the computer motherboard 10 but It is not directly related to this creation, and other components are omitted. The power-off device 20 is applied to the computer motherboard 10. When the power switch 101 is pressed by the user for more than a predetermined time, the power-off device 20 automatically outputs a power-off indication signal to the Real Time Clock (RTC). The circuit of the battery power of the chip 103 is powered off, so that the RTC chip 103 clears the CMOS data by itself, so that the user or the maintenance personnel can issue the command to clear the CMOS register without disassembling the casing. The operation is very simple.

The power-off device 20 for creating an instant clock chip of a computer motherboard includes: a first device 201 and a second device 203, and the computer motherboard 10 has at least built-in: an RTC chip 103, a battery power source 105 (for example Is a mercury battery), and a power switch 101, the RTC chip 103, and a battery power source 105 Both the power switch 101 and the power switch 101 are conventional components for the computer motherboard 10. A specific example of the RTC chip 103 is, for example, integrating all of the functions of the conventional South Bridge chip that include the RTC chip, or integrating all of the functions built into the Platform Controller Hub (PCH) that include the RTC chip.

The first device 201 is controlled by the second device 203, and is electrically connected to the battery power source 105, and is used to control the battery power source 105 to input a high level voltage or a low level voltage to the RTC chip 103. Wherein the high level voltage or low level voltage is the VBAT pin (Pin) input to the RTC wafer 103.

The second device 203 is configured to receive the power switch signal 101a from the power switch 101, and to determine whether the received power switch signal 101a has continued for more than a first predetermined time. If true, the first device The device 201 causes the first device 201 to control the battery power source 105 to maintain a low level voltage input to the RTC wafer 103 for at least a second predetermined time.

In Fig. 2, the specific embodiment of the first device 201 includes at least one or more semiconductor electronic switching elements 201a, 201b, and the specific elements of the semiconductor electronic switching elements 201a, 201b are respectively P-type gold oxide half field effect transistors ( MOSFET) and N-type gold oxide half field effect transistor. In the normal state, the "BATT_OFF" pin of the second device 203 is outputting a low level voltage, so that the P-type MOS field-effect transistor 201a is turned on, and the N-type MOSFET is in the field. The crystal 201b is formed in an off state, and therefore, the voltage of the battery power source 105 is controlled by the voltage of the VBAT pin (Pin) input to the RTC chip 103. At the high level voltage, that is, at this time, the RTC wafer 103 has at least the battery power source 105 supplying power.

The second device 203 is electrically connected to the power switch 101 and receives the power switch signal 101a generated by the power switch 101. The second device 203 determines whether the received power switch signal 101a has continued to exceed the first predetermined time (for example, a number of seconds between 10 seconds and 20 seconds), and if true, makes the first The device 201 causes the first device 201 to control the battery power source 105 to maintain the input of the low level voltage to the RTC wafer 103 for at least a second predetermined time (eg, at least 1 second). In the true state, the "BATT_OFF" pin of the second device 203 is the output high-level voltage, and the time of the high-level voltage is at least longer than the second predetermined time, thus making the P-type gold-oxygen half-field The effect transistor 201a forms an off state during the second predetermined time period, and the N-type MOS field-effect transistor 201b forms an on state during the second predetermined time period, and therefore, the voltage of the battery power source 105 is input to the RTC chip. The voltage of the VBAT pin (Pin) of 103 is controlled at the low level voltage, that is, at this time, the RTC wafer 103 has been powered off.

The length of time of the second predetermined time is sufficient to enable the RTC chip 103 to have sufficient time to clear the CMOS register data by itself. When the second device 203 returns to the normal state after the second predetermined time has elapsed, the "BATT_OFF" pin of the second device 203 is to restore the output low level voltage.

The third device 205 is electrically connected to the RTC chip 103 and the computer motherboard 10 of the power supply between the constant backup power supply. The third device 205 can employ a metal oxide half field effect transistor (MOSFET). In the normal state of the computer motherboard 10, the third device 205 is in an on state, and therefore, the constant power source of the power supply supplies power to the RTC chip 103. When the second device 203 is in the true state, the second device 203 outputs a signal to the third device 205 via the "OFF STBPOWER" pin, and the third device 205 is thus in an off state, thus enabling the power supply. The constant backup power supply of the device is powered off of the RTC chip 103. To avoid the automatic switching of the constant standby power to the battery power of the RTC chip inside the RTC chip, to ensure the success of the RTC chip 103 clearing the CMOS register data.

Moreover, when the second device 203 is in the true state, the second device 203 can send an indication signal to the light emitting diode (LED) 107 (eg, a power LED), and the indication signal is used, for example. This causes the power LED to flash, thus notifying the user of CMOS data clearing.

A specific embodiment of the second device 203 is, for example, a behavior controller or a special application integrated circuit. Moreover, another specific embodiment of the second device 203 is, for example, a super input output (SIO) chip built into the computer motherboard 10, or integrated with the built-in embedded in the computer motherboard 10 Embedded Controller (EC). If the second device 203 adopts the means for integrating the built-in SIO chip or the EC, at this time, when the second device 203 determines that the received power switch signal 101a does not continue to exceed the first predetermined time, the second device 203 It is based on the original operation of the computer motherboard 10 unchanged. For example, when the second device 203 determines the received power switch signal 101a The power switch signal 101a is a power-on signal, and the power switch signal 101a follows the original power-on operation. For another example, when the second device 203 determines that the received power switch signal 101a lasts for 4 seconds, and the power switch signal 101a that occurs at this time is a shutdown signal, the power switch signal 101a follows the original shutdown operation.

The power-off device 20 for the instant clock chip of the computer motherboard is provided to the user for directly pressing the power switch 101 for a period of time, and the power-off device 20 automatically causes the RTC chip 103 to clear the CMOS register. The data, the convenience of its operation, allows the user or maintenance personnel to release the command to clear the CMOS register without disassembling the casing. The operation is very simple. This creation feature is the advantage and the biggest feature of the creation. .

However, the above descriptions are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, and those skilled in the art can clearly make changes and modifications. The substance of creation.

10‧‧‧Computer motherboard

101‧‧‧Power switch

101a‧‧‧Power switch signal

103‧‧‧RTC chip

105‧‧‧Battery power supply

107‧‧‧LED

20‧‧‧Power supply device

201‧‧‧ first device

201a, 201b‧‧‧ semiconductor electronic switching components

203‧‧‧second device

205‧‧‧ third device

FIG. 1 is a schematic diagram showing the architecture of a power-off device for an instant clock chip of a computer motherboard.

Figure 2 shows a specific embodiment of the spirit of the creation according to the first figure.

10‧‧‧Computer motherboard

101‧‧‧Power switch

101a‧‧‧Power switch signal

103‧‧‧RTC chip

105‧‧‧Battery power supply

107‧‧‧LED

20‧‧‧Power supply device

201‧‧‧ first device

201a, 201b‧‧‧ semiconductor electronic switching components

203‧‧‧second device

205‧‧‧ third device

Claims (10)

A power-off device for an instant clock chip of a computer motherboard, wherein the computer motherboard comprises: the Real Time Clock (RTC) chip, a battery power source, and a power switch, comprising: a first device Controlled by a second device and electrically connected to the battery power source, and configured to control the battery power source to input a high level voltage or a low level voltage to the RTC chip; the second device For receiving a power switch signal from the power switch, and for determining whether the received power switch signal has continued for more than a first predetermined time, and if so, causing the first device to The first device is caused to control the battery power to maintain the low level voltage input to the RTC chip for at least a second predetermined time. The power-off device for an instant clock chip for a computer motherboard according to claim 1, further comprising: a third device controlled by the second device and electrically connected to the RTC The chip is connected to a constant power source of a power supply of the computer motherboard, and is configured to receive a signal from the second device, and cut the constant backup power supply to the RTC chip according to the signal Power supply. The power-off device for an instant clock chip for a computer motherboard according to claim 1, wherein the RTC chip is integrated in a south bridge chip or a platform controller (PCH) . The power-off device for an instant clock chip for a computer motherboard according to claim 1, wherein the second device is a controller or a special application integrated body. Circuit. The power-off device for an instant clock chip for a computer motherboard according to claim 1, wherein the second device integrates a super input output (Super Input Output) built in the computer motherboard. The SIO) chip, or an embedded controller built into the computer motherboard. The power-off device for an instant clock chip for a computer motherboard according to claim 2, wherein the first device comprises at least one semiconductor electronic switching component, and wherein the third device is At least one or more semiconductor electronic switching elements are included. The power-off device for an instant clock chip for a computer motherboard according to claim 6, wherein the semiconductor electronic switching element is a metal oxide half field effect transistor (MOSFET). The power-off device for an instant clock chip for a computer motherboard according to claim 1, wherein the first predetermined time is a number of seconds between 10 seconds and 20 seconds. The power-off device for an instant clock chip for a computer motherboard according to claim 1, wherein the battery power source is a mercury battery. The power-off device for an instant clock chip for a computer motherboard according to claim 1, wherein the second predetermined time is at least 1 second, thereby ensuring that the CMOS data of the RTC chip has been cleared. .