A structure to reduce the power consumption of electronic products by reducing the spool current

Abstract

This utility model discloses a structure for reducing the power consumption of electronic products by sourcing current. It includes a sourcing resistor, a detection port, and a button connected in a circuit. The sourcing resistor is built into the I / O port of a microcontroller, and its switching is controlled by the microcontroller's I / O port. When the button is pressed and the detection port detects a voltage level, the microcontroller disconnects the sourcing resistor. When the button is released, the microcontroller automatically detects the high-level jitter pattern at the input terminal and automatically closes the sourcing resistor, allowing the detection port to re-determine the voltage level of the port. This utility model extends battery life by accurately identifying both high and low voltage levels without consuming sourcing current.

Description

Technical Field

[0001] This utility model relates to a structure for reducing the power consumption of electronic products by reducing the current draw, and belongs to the field of tool technology. Background Technology

[0002] When traditional electronic products need to detect input signals (such as the high and low levels of button signals), under the premise of high input impedance, a pull-up or pull-down resistor is often designed to set the initial level state to avoid the detection port being affected by the ambient electric field or electromagnetic interference. When the input source (switch or button) is turned on, the level state of the input terminal will change accordingly. At the same time, the pull-up current after the current is limited by the resistor will flow through the input source, which will increase the power consumption of the electronic product. For electronic products with low power sleep requirements (such as car remote controls), this long-term power consumption after entering sleep mode directly affects the service life.

[0003] like Figure 3 The most common types of pull-up and pull-down are described below. Let's briefly explain the working logic using the pull-up method (left side). If the voltage at VCC is 5V and the pull-up resistor is 10KΩ, when the button is not pressed, the detection port relies on the pull-up effect of the resistor, and the voltage is close to the VCC value. The logic judges it as a high level. Because the input impedance of the detection port is very high (generally reaching 1MΩ, 1MΩ = 1000KΩ = 1000000Ω), the pull-up current through the resistor is negligible. If the button is pressed and connected, the detection port is connected to GND through the pull-up resistor and the button, and the voltage value is close to the GND value. The logic judges it as a low level, and the detection port completes the button's on / off state detection. However, when the button is pressed, current flows continuously from VCC through the pull-up resistor and the button to GND. This is called the pull-up current. If calculated according to the above parameters... Current value = 5V ÷ 10KΩ = 0.5mA Taking a car RKE wireless remote control as an example, the button battery used in a remote control is generally 250mAh. If the remote control buttons are constantly stuck, the battery life is 250 ÷ 0.5 = 500 hours, which is less than 21 days. However, the current of a normal remote control in sleep mode is less than 0.0001mA, and the theoretical storage time can reach 10416 days, or about 28 years.

[0004] Therefore, there is a need for a structure that reduces the power consumption of electronic products by reducing the spooling current, and a method that can accurately identify both high and low voltage levels without consuming spooling current to extend battery life. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a structure that reduces the power consumption of electronic products by reducing the current draw, and a method that can accurately identify both high and low level states without consuming current draw to extend the battery life; this can overcome the shortcomings of the prior art.

[0006] The objective of this utility model is achieved through the following technical solution: This utility model discloses a structure for reducing the power consumption of electronic products by pulling current. It includes a pull-up resistor, a detection port, and a button connected in a circuit. The pull-up resistor is built into the I / O port of a microcontroller. The microcontroller controls the switching of the pull-up resistor through the I / O port. When the button is turned on and the detection port detects the level, the microcontroller disconnects the pull-up resistor. When the button is turned off, the microcontroller automatically detects the high-level mode of the input terminal jitter and automatically closes the pull-up resistor to realize the detection port to judge the level state of the port again.

[0007] The above describes enabling the built-in pull-up resistors of the microcontroller's I / O ports by configuring registers.

[0008] As mentioned above, pull-up resistors are divided into pull-up resistors and pull-down resistors, and both pull-up resistors and pull-down resistors are built into different I / O ports of the microcontroller for separate control.

[0009] Compared with the prior art, the beneficial effects of this utility model are: 1. The core of this utility model is that when a logic level detection is completed, if the button is in the on state, the pull-up resistor is turned off by this method to reduce the current power consumption of the whole machine. When the button is released without the pull-up resistor and is in the off state, the interference of the ambient electric field can be used to achieve the state switching. In order to avoid the port being floating and causing misjudgment, the pull-up resistor needs to be turned on again, and then the level state of the port is judged again. The level state at this time is considered a valid level state.

[0010] 2. A method that accurately identifies both high and low voltage levels without consuming shunting current extends battery life. Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings, wherein: Figure 1This is a schematic diagram of the connection structure of the controllable pull-up resistor and pull-down resistor built into the chip of this utility model.

[0012] Figure 2 This is a schematic diagram of the basic structure of the IO port of this utility model.

[0013] Figure 3 This is a schematic diagram of the connection structure of the pull-up resistor, the test port, and the button.

[0014] Among them, pull-up resistor 1; pull-up resistor 1-1; pull-down resistor 1-2; detection port 2; button 3. Detailed Implementation

[0015] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0016] like Figures 1-3 As shown, this utility model discloses a structure for reducing the power consumption of electronic products by pulling up current. It includes a pull-up resistor 1, a detection port 2, and a button 3 connected in a circuit. The pull-up resistor 1 is built into the I / O port of a microcontroller. The microcontroller's I / O port controls the switching of the pull-up resistor 1. When the button 3 is turned on and the detection port 2 detects a voltage level, the microcontroller disconnects the pull-up resistor 1. When the button 3 is turned off, the microcontroller automatically detects the high-level jitter mode at the input terminal and automatically closes the pull-up resistor 1, allowing the detection port 2 to re-determine the port's voltage level. Specifically, the pull-up resistor 1 is divided into a pull-up resistor 1-1 and a pull-down resistor 1-2. Both pull-up resistors 1-1 and 1-2 are built into different I / O ports of the microcontroller for separate control. Furthermore, the pull-up resistor 1 built into the microcontroller's I / O port is enabled using a configuration register. This structure, described using the microcontroller's ordinary I / O port control, during normal operation, uses a configuration register to enable the pull-up resistor 1-1 built into the microcontroller's I / O port. Figure 1 As shown, turning on switch A provides pull-up resistor 1-1, and turning on switch B provides pull-down resistor 1-2. When a button is pressed, the input becomes level, and then the pull-up resistor is turned off to avoid pull-up current and reduce power consumption. When the button is released, the input, due to its high input impedance and the influence of the ambient electric field, eventually enters a jittery high-level mode. The microcontroller's I / O port detects this change, re-enables pull-up resistor 1-1, and checks the port level again, completing a logic level switch. This structure reduces power consumption by turning off pull-up current when the electronic product enters sleep mode. Specifically, when the button is pressed, the pull-up current is turned off by disconnecting pull-up resistor 1, thereby reducing current consumption.

[0017] The above description is merely a preferred embodiment of the present utility model and is not intended to restrict the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical solution of the present utility model and based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A structure for reducing the power consumption of electronic products by reducing the pull-up current, comprising a pull-up resistor (1) connected in circuit, a detection port (2) and a button (3), characterized in that, The pull resistor (1) is built into the IO port of the microcontroller. The switch of the pull resistor (1) is controlled by the IO port of the microcontroller. When the button (3) is turned on and the detection port (2) detects the level, the microcontroller disconnects the pull resistor (1). When the button (3) is turned off, the microcontroller automatically detects the high-level mode of the input terminal jitter and automatically closes the pull resistor (1) to realize the detection port (2) to judge the level state of the port again.

2. The structure for reducing power consumption by reducing spooling current in electronic products according to claim 1, characterized in that, Enable the built-in pull-up resistor of the microcontroller's IO port by configuring the register (1).

3. The structure for reducing the power consumption of electronic products by reducing spooling current according to claim 1, characterized in that, The pull-up resistor (1) is divided into a pull-up resistor (1-1) and a pull-down resistor (1-2). The pull-up resistor (1-1) and the pull-down resistor (1-2) are both built into different I / O ports of the microcontroller for separate control.

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