Power-down control circuit on embedded single-chip microcomputer communication module

Abstract

The utility model discloses a power-on and power-off control circuit of an embedded single-chip microcomputer communication module, which dynamically manages the on-off of a power supply of an MODOM communication module U17 through the cooperative work of a logic control chip 4066, a power supply control chip U9 and a field effect transistor T1. When the single-chip microcomputer sends out a communication request, the circuit conducts the V3.6M power supply for the module to work; the power supply is automatically cut off after communication is completed, and non-communication cycle energy consumption is remarkably reduced. A double-signal combined control strategy is innovatively adopted, and a hardware-level power management chip is combined, so that power supply stability and low power consumption performance are ensured.

Description

Technical Field

[0001] This utility model relates to the field of embedded electronic technology, specifically to a power-down control circuit for an embedded microcontroller communication module. Background Technology

[0002] Embedded microcontrollers, also known as embedded microcontrollers, refer to dedicated computer systems that use microcontrollers as the core control unit and are embedded in the system architecture. They are a widely used type of embedded system architecture.

[0003] Existing embedded microcontroller communication modules typically employ continuous power supply, resulting in unnecessary power consumption outside of communication cycles. Traditional power management solutions cannot flexibly adapt to intermittent communication needs and suffer from poor power switching stability. This invention aims to address these issues by dynamically controlling the power supply of the communication module, combined with a hardware-level signal coordination mechanism, to achieve a balance between low power consumption and high reliability. Utility Model Content

[0004] The purpose of this invention is to provide a power-down control circuit for an embedded microcontroller communication module to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A power-down control circuit for an embedded microcontroller communication module includes the following components:

[0007] Field-effect transistor T1, logic control chip 4066, power control chip U9, MODOM communication module U17;

[0008] The gate G of the field-effect transistor T1 is connected to the output terminal of the logic control chip 4066. The input terminal of the logic control chip 4066 is connected to the control signal SD and the P1.5 pin of the microcontroller. The enable terminal U9-3 and the signal output terminal U9-1 of the power control chip U9 are connected to the output terminal of the logic control chip 4066 and the gate G of the field-effect transistor T1, respectively. The power output terminal V3.6M of the power control chip U9 is connected to the power input terminal of the MODOM communication module U17.

[0009] When the control signal SD is set to high and the microcontroller's P1.5 pin outputs a high level, the logic control chip 4066 drives the power control chip U9's U9-3 to a high level and U9-1 to a low level, turning on the field-effect transistor T1 and connecting the V3.6M power supply to the MODOM communication module U17 to complete communication. After communication is completed, the control signals SD and P1.5 return to low level, the field-effect transistor T1 turns off, and the V3.6M power supply is cut off to save energy.

[0010] Preferably, the logic control chip 4066 is a dual four-channel analog switch chip, used to realize the logic level conversion of the control signals SD and P1.5 to the power control chip U9.

[0011] Preferably, the power control chip U9 is a power management chip with an enable terminal U9-3 and a signal output terminal U9-1, and the level states of its U9-3 and U9-1 are controlled by the output signal of the logic control chip 4066.

[0012] Preferably, the field-effect transistor T1 is a P-channel field-effect transistor, and its conduction condition is that the gate G is grounded.

[0013] Preferably, when the control signal SD=1 and P1.5=1, the output terminal of the logic control chip 4066 outputs a high level to U9-3 and a low level to U9-1, triggering U9 to enable and controlling T1 to conduct.

[0014] Preferably, the power input terminal of the MODOM communication module U17 is connected to the V3.6M power supply through the field-effect transistor T1, and the power supply to U17 is cut off during non-communication cycles T1.

[0015] Preferably, it also includes a clock synchronization module connected to the microcontroller, used to calibrate the switching timing between the communication cycle and the non-communication cycle.

[0016] Preferably, the joint triggering mechanism of the control signals SD and P1.5 ensures atomic switching of power states and avoids abnormal power supply to the communication module.

[0017] Preferably, the power control chip U9 also integrates overvoltage protection and current detection functions to prevent the V3.6M power supply from overload or short circuit.

[0018] In the above technical solution, the power-down control circuit of the embedded microcontroller communication module provided by this utility model (1) through the dynamic power management: through the joint control of dual signals (SD+P1.5), the communication module is powered only when needed, and the power consumption during non-communication cycles approaches zero; (2) through the atomic switching: hardware-level collaboration ensures instantaneous switching of power state, avoiding communication failure caused by power supply abnormality; (3) through the integrated protection: the power control chip has built-in overvoltage / overcurrent detection to improve system stability; (4) through the low cost and high compatibility: using general-purpose devices and standard interface design, it is suitable for a variety of embedded scenarios. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a circuit diagram of an embodiment of the power-down control circuit for an embedded microcontroller communication module according to the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 As shown in the figure, the power-down control circuit for an embedded microcontroller communication module provided in this embodiment of the present invention includes the following components:

[0023] Field-effect transistor T1, logic control chip 4066, power control chip U9, MODOM communication module U17:

[0024] Among them, the gate G of the field-effect transistor T1 is connected to the output terminal of the logic control chip 4066, the input terminal of the logic control chip 4066 is connected to the control signal SD and the P1.5 pin of the microcontroller, the enable terminal U9-3 and the signal output terminal U9-1 of the power control chip U9 are connected to the output terminal of the logic control chip 4066 and the gate G of the field-effect transistor T1, respectively, and the power output terminal V3.6M of the power control chip U9 is connected to the power input terminal of the MODOM communication module U17.

[0025] When the control signal SD is set to high and the microcontroller's P1.5 pin outputs a high level, the logic control chip 4066 drives the power control chip U9, and U9-3 and U9-1 are at a low level, turning on the field-effect transistor T1 and connecting the V3.6M power supply to the MODOM communication module U17 to complete communication. After communication is completed, the control signals SD and P1.5 return to low level, the field-effect transistor T1 turns off, and the V3.6M power supply is cut off to save energy.

[0026] Preferably, the logic control chip 4066 is a dual four-channel analog switch chip, used to realize the logic level conversion of the control signals SD and P1.5 to the power control chip U9.

[0027] Preferably, the power control chip U9 is a power management chip with an enable terminal U9-3 and a signal output terminal U9-1, and the level states of its U9-3 and U9-1 are controlled by the output signal of the logic control chip 4066.

[0028] Preferably, the field-effect transistor T1 is a P-channel field-effect transistor, and its conduction condition is that the gate G is grounded.

[0029] Preferably, when the control signal SD=1 and P1.5=1, the output terminal of the logic control chip 4066 outputs a high level to U9-3 and a low level to U9-1, triggering U9 to enable and controlling T1 to conduct.

[0030] Preferably, the power input terminal of the MODOM communication module U17 is connected to the V3.6M power supply through the field-effect transistor T1, and T1 is in the off state during non-communication cycles, cutting off the power supply to U17.

[0031] Preferably, it also includes a clock synchronization module connected to the microcontroller for calibrating the switching timing between communication cycles and non-communication cycles.

[0032] Preferably, the joint triggering mechanism of control signals SD and P1.5 ensures atomic switching of power states and avoids abnormal power supply to the communication module.

[0033] Preferably, the power control chip U9 also integrates overvoltage protection and current detection functions to prevent the V3.6M power supply from overload or short circuit.

[0034] In this embodiment:

[0035] Core components include: field-effect transistor T1, logic control chip 4066, power control chip U9, and MODOM communication module U17;

[0036] Signal control: Power switching is triggered jointly by the control signal SD and the microcontroller pin P1.5;

[0037] Power management logic: When SD=1 and P1.5=1, the logic control chip 4066 drives the power control chip U9 to U9-3=1 and U9-1=0, which turns on the field-effect transistor T1 and connects the V3.6M power supply to the MODOM module; after the communication is completed, SD and P1.5 return to low level, and T1 turns off to cut off the power supply.

[0038] Protection mechanism: The power control chip U9 integrates overvoltage protection and current detection functions.

[0039] Example 1

[0040] A power-down control circuit for an embedded microcontroller communication module, with the following hardware connections:

[0041] The gate G of the field-effect transistor T1 is connected to the output terminal of the logic control chip 4066;

[0042] The input terminals of the logic control chip 4066 are connected to the SD signal and the P1.5 pin of the microcontroller, respectively.

[0043] The enable terminal U9-3 and the signal output terminal U9-1 of the power control chip U9 are respectively connected to the output terminal of the logic control chip 4066 and the gate G of T1;

[0044] The power input terminal of the MODOM module U17 is connected to the V3.6M power supply via T1.

[0045] Example 2

[0046] This embodiment further defines the features of Embodiment 1. The workflow is as follows:

[0047] Power-on trigger: When SD=1 and P1.5=1, 4066 outputs a high level to U9-3 and a low level to U9-1. U9 is enabled and T1 is turned on. The V3.6M power supply enables the MODOM module to enter the communication state.

[0048] Power-off reset: After communication is completed, SD and P1.5 return to low level, the output level of 4066 flips, U9 shuts down T1, and the V3.6M power supply is cut off.

[0049] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A power-down control circuit for an embedded microcontroller communication module, characterized in that, Includes the following components: Field-effect transistor T1, logic control chip 4066, power control chip U9, MODOM communication module U17; The gate G of the field-effect transistor T1 is connected to the output terminal of the logic control chip 4066. The input terminal of the logic control chip 4066 is connected to the control signal SD and the P1.5 pin of the microcontroller. The enable terminal U9-3 and the signal output terminal U9-1 of the power control chip U9 are connected to the output terminal of the logic control chip 4066 and the gate G of the field-effect transistor T1, respectively. The power output terminal V3.6M of the power control chip U9 is connected to the power input terminal of the MODOM communication module U17. When the control signal SD is set to high and the microcontroller's P1.5 pin outputs a high level, the logic control chip 4066 drives the power control chip U9's U9-3 to a high level and U9-1 to a low level, turning on the field-effect transistor T1 and connecting the V3.6M power supply to the MODOM communication module U17 to complete communication. After communication is completed, the control signals SD and P1.5 return to low level, the field-effect transistor T1 turns off, and the V3.6M power supply is cut off to save energy.

2. The power-down control circuit for an embedded microcontroller communication module according to claim 1, characterized in that, The logic control chip 4066 is a dual four-channel analog switch chip used to realize the logic level conversion of the control signals SD and P1.5 to the power control chip U9.

3. The power-down control circuit for an embedded microcontroller communication module according to claim 1, characterized in that, The power control chip U9 is a power management chip with an enable terminal U9-3 and a signal output terminal U9-1. The level states of its U9-3 and U9-1 are controlled by the output signal of the logic control chip 4066.

4. The power-down control circuit for an embedded microcontroller communication module according to claim 1, characterized in that, The field-effect transistor T1 is a P-channel field-effect transistor, and its conduction condition is that its gate G is grounded.

5. The power-down control circuit for an embedded microcontroller communication module according to claim 1, characterized in that, When the control signal SD=1 and P1.5=1, the output of the logic control chip 4066 outputs a high level to U9-3 and a low level to U9-1, triggering U9 to enable and controlling T1 to conduct.

6. The power-down control circuit for an embedded microcontroller communication module according to claim 1, characterized in that, The power input terminal of the MODOM communication module U17 is connected to the V3.6M power supply through the field-effect transistor T1, and T1 is in the off state during non-communication cycles, cutting off the power supply to U17.

7. The power-down control circuit for an embedded microcontroller communication module according to claim 1, characterized in that, It also includes a clock synchronization module connected to the microcontroller, used to calibrate the switching timing between communication cycles and non-communication cycles.

8. The power-down control circuit for an embedded microcontroller communication module according to claim 1, characterized in that, The joint triggering mechanism of the control signals SD and P1.5 ensures atomic switching of power states and avoids abnormal power supply to the communication module.

9. The power-down control circuit for an embedded microcontroller communication module according to claim 1, characterized in that, The power control chip U9 also integrates overvoltage protection and current detection functions to prevent the V3.6M power supply from overload or short circuit.

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