Voltage-stabilizing power supply circuit of NOR Flash chip

Abstract

The invention discloses a voltage-stabilizing power supply circuit of a NOR Flash chip, and relates to the field of power supply, and the circuit comprises a voltage-stabilizing power supply module which is used for introducing a power supply voltage, converting the power supply voltage into a stabilized voltage, outputting the stabilized voltage, and supplying the stabilized voltage to the NOR Flash chip; the detection boosting module is used for detecting whether the voltage of the power supply is lower than the reference voltage, and boosting the power supply and then inputting the boosted power supply to the voltage-stabilizing power supply module when the voltage is lower than the reference voltage; compared with the prior art, the invention has the following beneficial effects: when the power supply is under-voltage, the detection boosting module boosts the power supply and then continues to supply power to the voltage stabilization power supply module, and at the same time, a light-emitting tube is arranged for indication, so that a user has sufficient time to end the work of the NOR Flash chip and related equipment; accidents such as data loss caused by warehouse promotion processing are avoided; and an undervoltage alarm module is arranged to give an alarm prompt when the boosted power supply is also insufficient in power supply.

Description

Technical Field

[0001] The invention relates to the field of power supply, in particular to a voltage-stabilizing power supply circuit for a NOR Flash chip. Background Art

[0002] NOR Flash is commonly used in embedded systems, such as smartphones, printers, digital cameras, TWS headphones, AMOLED screens and other devices. In these devices, NOR Flash is used to store program code and firmware to ensure the normal operation of the device. The operating voltage range of the NOR Flash chip is listed in detail in the data sheet or specification book. Unstable voltage may cause the chip to work abnormally or even be damaged.

[0003] During use, the power supply is undervoltage. Generally speaking, undervoltage requires power off in time to avoid damage to the chip, which results in the equipment-related work being completed quickly and the processing time being short. This needs to be improved. Summary of the invention

[0004] The object of the present invention is to provide a voltage-stabilized power supply circuit for a NOR Flash chip to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A voltage-stabilizing power supply circuit for a NOR Flash chip, comprising:

[0007] The voltage-stabilized power supply module is used to introduce the power supply voltage, convert it into a regulated output, and supply it to the NOR Flash chip;

[0008] A detection boost module is used to detect whether the power supply voltage is lower than the reference voltage. If it is lower than the reference voltage, the power supply voltage is boosted and then input to the voltage stabilizing power supply module;

[0009] The undervoltage alarm module is used to detect whether the voltage after the power supply is boosted is lower than the reference voltage. If it is lower than the reference voltage, an alarm will be issued;

[0010] The power supply is connected to the first input end of the voltage-stabilizing power supply module and the input end of the detection boost module, and the output end of the detection boost module is connected to the second input end of the voltage-stabilizing power supply module and the input end of the undervoltage alarm module.

[0011] As a further solution of the present invention: the voltage stabilizing power supply module includes:

[0012] The voltage input and output unit is used to output the power supply or the boosted power supply to the NORFlash chip through the transistor;

[0013] The feedback adjustment unit is used to detect the voltage output to the NOR Flash chip, and feedback-adjust the conduction degree of the transistor to build a regulated voltage output;

[0014] The first input end of the voltage input and output unit is connected to the power supply, the second input end of the voltage input and output unit is connected to the output end of the detection boost module, the output end of the voltage input and output unit is connected to the input end of the feedback regulation unit, and the output end of the feedback regulation unit is connected to the third input end of the voltage input and output unit.

[0015] As a further scheme of the present invention: the voltage input and output unit includes a first capacitor, a first diode, a second diode, a first resistor, a first transistor, a second resistor, and a second capacitor. The positive electrode of the first diode is connected to one end of the first capacitor and a power supply, and the other end of the first capacitor is grounded. The negative electrode of the first diode is connected to the negative electrode of the second diode, one end of the first resistor, and the collector of the first transistor. The positive electrode of the second diode is connected to the output end of the detection boost module, the base of the first transistor is connected to the other end of the first resistor and the output end of the feedback adjustment unit, the emitter of the first transistor is connected to one end of the second resistor, one end of the second capacitor, and the input end of the feedback adjustment unit, the other end of the second resistor is grounded, and the other end of the second capacitor is grounded.

[0016] As a further solution of the present invention: the feedback regulation unit includes a third resistor, a fourth resistor, a sixth diode, a third capacitor, and a second transistor, one end of the third resistor is connected to the output end of the voltage input-output unit, the other end of the third resistor is connected to one end of the fourth resistor, one end of the third capacitor, and the base of the second transistor, the other end of the fourth resistor is grounded, the other end of the third capacitor is grounded, the emitter of the second transistor is connected to the cathode of the sixth diode, the anode of the sixth diode is grounded, and the collector of the second transistor is connected to the third input end of the voltage input-output unit.

[0017] As a further solution of the present invention: the detection boost module includes:

[0018] A boost judgment unit is used to detect whether the power supply voltage is lower than the reference voltage. If it is lower than the reference voltage, a square wave is generated to drive the boost to perform unit operation;

[0019] The boost unit is used to boost the input power supply and output it to the voltage-stabilized power supply module when working;

[0020] The input end of the boost judgment unit is connected to the power supply, the first output end of the boost judgment unit is connected to the input end of the boost operation unit, the second output end of the boost judgment unit is connected to the input end of the undervoltage alarm module, and the output end of the boost operation unit is connected to the second input end of the voltage stabilizing power supply module and the input end of the undervoltage alarm module.

[0021] As a further solution of the present invention: the boost judgment unit includes a first amplifier, a first MOS tube, a second amplifier, and a fifth resistor. The in-phase end of the first amplifier is connected to the reference voltage, the inverting end of the first amplifier is connected to the power supply, the output end of the first amplifier is connected to the G pole of the first MOS tube and the input end of the boost unit, the D pole of the first MOS tube is connected to the power supply, the S pole of the first MOS tube is connected to the in-phase end of the second amplifier, the inverting end of the second amplifier is connected to the sawtooth wave, the output end of the second amplifier is connected to one end of the fifth resistor and the input end of the undervoltage alarm module, and the other end of the fifth resistor is connected to the input end of the boost unit.

[0022] As a further solution of the present invention: the boost unit includes a second MOS tube, a first inductor, a third MOS tube, a third diode, and a fourth capacitor. The D pole of the second MOS tube is connected to the power supply, the G pole of the second MOS tube is connected to the first output end of the boost judgment unit, the S pole of the second MOS tube is connected to one end of the first inductor, the other end of the first inductor is connected to the D pole of the third MOS tube and the positive pole of the third diode, the S pole of the third MOS tube is grounded, the G pole of the third MOS tube is connected to the first output end of the boost judgment unit, the negative pole of the third diode is connected to one end of the fourth capacitor, the input end of the undervoltage alarm module, and the second input end of the voltage stabilizing power supply module, and the other end of the fourth capacitor is grounded.

[0023] As a further solution of the present invention: the undervoltage alarm module includes:

[0024] A pre-detection unit is used to determine whether the detection boost module works to boost the power supply, and after determining that the detection boost module works to boost the power supply, drive the alarm indication unit;

[0025] An alarm indicating unit is used to determine whether the boosted power supply is less than a reference voltage. If it is less than the reference voltage, an alarm is issued to indicate insufficient voltage.

[0026] The input end of the pre-detection unit is connected to the output end of the detection boost module, and the output end of the pre-detection unit is connected to the input end of the alarm indication unit.

[0027] As a further solution of the present invention: the pre-detection unit includes a fifth diode, a sixth resistor, a seventh resistor, a fifth capacitor, a sixth capacitor, and a third AND gate, one end of the sixth resistor is connected to the output end of the detection boost module, the negative electrode of the fifth diode is connected to one end of the seventh resistor, the positive electrode of the fifth diode is connected to the output end of the detection boost module, the other end of the sixth resistor is connected to one end of the fifth capacitor and one end of the input end of the AND gate, the other end of the seventh resistor is connected to one end of the sixth capacitor and the other end of the input end of the AND gate, the other end of the fifth capacitor is grounded, the other end of the sixth capacitor is grounded, and the output end of the third AND gate is connected to the input end of the alarm indication unit.

[0028] As a further solution of the present invention: the alarm indication unit includes a fourth amplifier, a speaker, and a fourth diode. The in-phase end of the fourth amplifier is connected to the reference voltage, the inverting end of the fourth amplifier is connected to the output end of the detection boost module (the power supply after amplification), the power supply end of the fourth amplifier is connected to the output end of the pre-detection unit, the output end of the fourth amplifier is connected to one end of the speaker, the other end of the speaker is connected to the positive electrode of the fourth diode, and the negative electrode of the fourth diode is grounded.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: when the power supply is under-voltage, the present invention continues to supply power to the voltage-stabilizing power supply module after boosting the power supply through the detection boost module, and at the same time provides a light-emitting tube indication, so that the user has sufficient time to finish the work of the NOR Flash chip and related equipment, avoiding accidents such as data loss caused by hasty processing; an under-voltage alarm module is provided, and an alarm prompts when the power supply after the boost is also insufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The present invention is a circuit diagram of a voltage-stabilizing power supply circuit for a NOR Flash chip. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] See also Figure 1 , a voltage-stabilizing power supply circuit for a NOR Flash chip, comprising:

[0033] The voltage-stabilized power supply module is used to introduce the power supply VCC voltage, convert it into a regulated output, and supply it to the NOR Flash chip;

[0034] A detection boost module is used to detect whether the voltage of the power supply VCC is lower than the reference voltage VREF. If it is lower than the reference voltage VREF, the power supply VCC is boosted and then input to the voltage stabilizing power supply module;

[0035] The undervoltage alarm module is used to detect whether the voltage of the power supply VCC after boosting is lower than the reference voltage VREF. If it is lower than the reference voltage VREF, an alarm prompt will be issued;

[0036] The power supply VCC is connected to the first input end of the voltage-stabilizing power supply module and the input end of the detection boost module, and the output end of the detection boost module is connected to the second input end of the voltage-stabilizing power supply module and the input end of the undervoltage alarm module.

[0037] In this example: See Figure 1 , the voltage-stabilized power supply module includes:

[0038] The voltage input and output unit is used to output the power supply VCC or the boosted power supply VCC to the NOR Flash chip through the transistor;

[0039] The feedback adjustment unit is used to detect the voltage output to the NOR Flash chip, and feedback-adjust the conduction degree of the transistor to build a regulated voltage output;

[0040] The first input end of the voltage input and output unit is connected to the power supply VCC, the second input end of the voltage input and output unit is connected to the output end of the detection boost module, the output end of the voltage input and output unit is connected to the input end of the feedback regulation unit, and the output end of the feedback regulation unit is connected to the third input end of the voltage input and output unit.

[0041] In this example: See Figure 1 The voltage input and output unit includes a first capacitor C1, a first diode D1, a second diode D2, a first resistor R1, a first transistor V1, a second resistor R2, and a second capacitor C2. The positive electrode of the first diode D1 is connected to one end of the first capacitor C1 and the power supply VCC, the other end of the first capacitor C1 is grounded, the negative electrode of the first diode D1 is connected to the negative electrode of the second diode D2, one end of the first resistor R1, and the collector of the first transistor V1, the positive electrode of the second diode D2 is connected to the output end of the detection boost module, the base of the first transistor V1 is connected to the other end of the first resistor R1 and the output end of the feedback adjustment unit, the emitter of the first transistor V1 is connected to one end of the second resistor R2, one end of the second capacitor C2, and the input end of the feedback adjustment unit, the other end of the second resistor R2 is grounded, and the other end of the second capacitor C2 is grounded.

[0042] After the power supply VCC voltage is input, it is output to the base of the first transistor V1 through the first diode D1 and the first resistor R1. The first transistor V1 conducts and outputs the voltage to supply the NOR Flash chip. The first diode D1 is used to introduce the power supply VCC, and the second diode D2 is used to introduce the boosted power supply VCC.

[0043] In this example: See Figure 1The feedback regulation unit includes a third resistor R3, a fourth resistor R4, a sixth diode D2, a third capacitor C3, and a second triode V2, one end of the third resistor R3 is connected to the output end of the voltage input-output unit, the other end of the third resistor R3 is connected to one end of the fourth resistor R4, one end of the third capacitor C3, and the base of the second triode V2, the other end of the fourth resistor R4 is grounded, the other end of the third capacitor C3 is grounded, the emitter of the second triode V2 is connected to the cathode of the sixth diode D2, the anode of the sixth diode D2 is grounded, and the collector of the second triode V2 is connected to the third input end of the voltage input-output unit.

[0044] The third resistor R3 and the fourth resistor R4 collect the size of the voltage VOUT supplied to the NOR Flash chip. The voltage on the fourth resistor R4 is transmitted to the base of the second transistor V2. The larger the voltage VOUT is, the larger the voltage on the fourth resistor R4 is, the greater the conduction degree of the second transistor V2 is, and the smaller the voltage drop is. The voltage drop on the sixth diode D2 (voltage regulator diode) is certain, so that the base voltage of the first transistor V1 decreases, the conduction degree of the first transistor V1 is reduced, and the voltage VOUT is reduced. Conversely, the smaller the voltage VOUT is, the larger the voltage at the base of the first transistor V1 is, and the voltage VOUT is increased, thereby constructing a regulated output.

[0045] In this example: See Figure 1 , the detection boost module includes:

[0046] The boost judgment unit is used to detect whether the voltage of the power supply VCC is lower than the reference voltage VREF. When it is lower than the reference voltage VREF, a square wave is generated to drive the boost to perform unit operation;

[0047] The boost unit is used to boost the input power supply VCC and output it to the voltage-stabilized power supply module during operation;

[0048] The input end of the boost judgment unit is connected to the power supply VCC, the first output end of the boost judgment unit is connected to the input end of the boost operation unit, the second output end of the boost judgment unit is connected to the input end of the undervoltage alarm module, and the output end of the boost operation unit is connected to the second input end of the voltage stabilizing power supply module and the input end of the undervoltage alarm module.

[0049] In this example: See Figure 1The boost judgment unit includes a first amplifier U1, a first MOS tube V1, a second amplifier U2, and a fifth resistor R5. The in-phase end of the first amplifier U1 is connected to the reference voltage VREF, the inverting end of the first amplifier U1 is connected to the power supply VCC, the output end of the first amplifier U1 is connected to the G pole of the first MOS tube V1 and the input end of the boost unit, the D pole of the first MOS tube V1 is connected to the power supply VCC, the S pole of the first MOS tube V1 is connected to the in-phase end of the second amplifier U2, the inverting end of the second amplifier U2 is connected to the sawtooth wave, the output end of the second amplifier U2 is connected to one end of the fifth resistor R5 and the input end of the undervoltage alarm module, and the other end of the fifth resistor R5 is connected to the input end of the boost unit.

[0050] The first amplifier U1 compares the power supply VCC and the reference voltage VREF. Under normal conditions, the power supply VCC is greater than the reference voltage VREF and is sufficient to power the NOR Flash chip. At this time, the voltage at the inverting terminal of the first amplifier U1 is higher than the voltage at the non-inverting terminal, and the first amplifier U1 outputs a low level. When the power supply VCC voltage drops and is insufficient to power the NOR Flash chip, the voltage at the non-inverting terminal of the first amplifier U1 is higher than the voltage at the inverting terminal, and the first amplifier U1 outputs a high level, triggering the first MOS tube V1 to turn on. The voltage at the non-inverting terminal input of the second amplifier U2 and the sawtooth wave at the inverting terminal input cause the output terminal of the second amplifier U2 to output a square wave signal to drive the boost unit.

[0051] In this example: See Figure 1 The boost unit includes a second MOS tube V2, a first inductor L1, a third MOS tube V3, a third diode D3, and a fourth capacitor C4. The D pole of the second MOS tube V2 is connected to the power supply VCC, the G pole of the second MOS tube V2 is connected to the first output end of the boost judgment unit, the S pole of the second MOS tube V2 is connected to one end of the first inductor L1, the other end of the first inductor L1 is connected to the D pole of the third MOS tube V3 and the positive pole of the third diode D3, the S pole of the third MOS tube V3 is grounded, the G pole of the third MOS tube V3 is connected to the first output end of the boost judgment unit, the negative pole of the third diode D3 is connected to one end of the fourth capacitor C4, the input end of the undervoltage alarm module, and the second input end of the voltage stabilizing power supply module, and the other end of the fourth capacitor C4 is grounded.

[0052] After the first amplifier U1 outputs a high level, the second MOS tube V2 is turned on, and the first inductor L1, the third MOS tube V3, the third diode D3, and the fourth capacitor C4 form a BOOST boost circuit, which boosts the power supply VCC and outputs it (common point A). The third diode D3 acts as a light-emitting diode, which starts to illuminate and indicate the boost function, indicating that the current power supply VCC voltage is insufficient. The boosted power supply VCC is input to the voltage-stabilizing power supply module through the second diode D2 to maintain a stable voltage output to the NOR Flash chip.

[0053] In this example: See Figure 1 , the undervoltage alarm module includes:

[0054] A pre-detection unit, used to determine whether the detection boost module works to boost the power supply VCC, and after determining that the detection boost module works to boost the power supply VCC, drive the alarm indication unit;

[0055] An alarm indicating unit is used to determine whether the boosted power supply VCC is less than the reference voltage VREF. If it is less than the reference voltage VREF, an alarm is issued to indicate insufficient voltage.

[0056] The input end of the pre-detection unit is connected to the output end of the detection boost module, and the output end of the pre-detection unit is connected to the input end of the alarm indication unit.

[0057] In this example: See Figure 1 The pre-detection unit includes a fifth diode D5, a sixth resistor R6, a seventh resistor R7, a fifth capacitor C5, a sixth capacitor C6, and a third AND gate U3. One end of the sixth resistor R6 is connected to the output end of the detection boost module, the cathode of the fifth diode D5 is connected to one end of the seventh resistor R7, the anode of the fifth diode D5 is connected to the output end of the detection boost module, the other end of the sixth resistor R6 is connected to one end of the fifth capacitor C5 and one end of the input end of the AND gate, the other end of the seventh resistor R7 is connected to one end of the sixth capacitor C6 and the other end of the input end of the AND gate, the other end of the fifth capacitor C5 is grounded, the other end of the sixth capacitor C6 is grounded, and the output end of the third AND gate U3 is connected to the input end of the alarm indication unit.

[0058] When both common point A and common point B are at high level, the input terminals of the third AND gate U3 are at high level, and the third AND gate U3 outputs high level to drive the alarm indication unit to work. The pre-detection unit is set to ensure that the boost module has boosted the power supply VCC at this time, so as to avoid triggering the alarm indication unit to work without boosting the power supply VCC.

[0059] In this example: See Figure 1The alarm indication unit includes a fourth amplifier U4, a speaker SPEAKER, and a fourth diode D4. The in-phase end of the fourth amplifier U4 is connected to the reference voltage VREF, the inverting end of the fourth amplifier U4 is connected to the output end of the detection boost module (the amplified power supply VCC), the power supply end of the fourth amplifier U4 is connected to the output end of the pre-detection unit, the output end of the fourth amplifier U4 is connected to one end of the speaker SPEAKER, the other end of the speaker SPEAKER is connected to the anode of the fourth diode D4, and the cathode of the fourth diode D4 is grounded.

[0060] The high level output by the third AND gate U3 is used as the power supply VCC voltage of the fourth amplifier U4 to control whether the fourth amplifier U4 is working. The fourth amplifier U4 compares the boosted power supply VCC with the reference voltage VREF to determine whether the boosted power supply VCC is still sufficient to support the normal operation of the NOR Flash chip as time goes by. When the boosted power supply VCC voltage is low, the voltage at the in-phase terminal of the fourth amplifier U4 is higher than the voltage at the inverting terminal, the speaker SPEAKER beeps to prompt, and the fourth diode D4 emits light for indication.

[0061] The working principle of the present invention is as follows: a voltage-stabilizing power supply module is used to introduce a power supply VCC voltage, convert it into a voltage-stabilizing output, and supply it to a NOR Flash chip; a voltage-boosting module is used to detect whether the power supply VCC voltage is lower than a reference voltage VREF. When it is lower than the reference voltage VREF, the power supply VCC is boosted and then input into the voltage-stabilizing power supply module; an undervoltage alarm module is used to detect whether the boosted voltage of the power supply VCC is lower than the reference voltage VREF. When it is lower than the reference voltage VREF, an alarm is given.

[0062] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A voltage-stabilized power supply circuit for a NOR Flash chip, characterized in that: The voltage stabilizing power supply circuit of the NOR Flash chip includes: The voltage-stabilized power supply module is used to introduce the power supply voltage, convert it into a regulated output, and supply it to the NOR Flash chip; A detection boost module is used to detect whether the power supply voltage is lower than the reference voltage. If it is lower than the reference voltage, the power supply voltage is boosted and then input to the voltage stabilizing power supply module; The undervoltage alarm module is used to detect whether the voltage after the power supply is boosted is lower than the reference voltage. If it is lower than the reference voltage, an alarm will be issued; The power supply is connected to the first input end of the voltage-stabilizing power supply module and the input end of the detection boost module, and the output end of the detection boost module is connected to the second input end of the voltage-stabilizing power supply module and the input end of the undervoltage alarm module.

2. The voltage-stabilized power supply circuit of the NOR Flash chip according to claim 1, characterized in that: The voltage regulated power supply module includes: The voltage input and output unit is used to output the power supply or the boosted power supply to the NOR Flash chip through the transistor; The feedback adjustment unit is used to detect the voltage output to the NOR Flash chip, and feedback-adjust the conduction degree of the transistor to build a regulated voltage output; The first input end of the voltage input and output unit is connected to the power supply, the second input end of the voltage input and output unit is connected to the output end of the detection boost module, the output end of the voltage input and output unit is connected to the input end of the feedback regulation unit, and the output end of the feedback regulation unit is connected to the third input end of the voltage input and output unit.

3. The voltage-stabilized power supply circuit of the NOR Flash chip according to claim 2, characterized in that: The voltage input and output unit includes a first capacitor, a first diode, a second diode, a first resistor, a first transistor, a second resistor, and a second capacitor. The positive electrode of the first diode is connected to one end of the first capacitor and a power supply, and the other end of the first capacitor is grounded. The negative electrode of the first diode is connected to the negative electrode of the second diode, one end of the first resistor, and the collector of the first transistor. The positive electrode of the second diode is connected to the output end of the detection boost module, the base of the first transistor is connected to the other end of the first resistor and the output end of the feedback adjustment unit, the emitter of the first transistor is connected to one end of the second resistor, one end of the second capacitor, and the input end of the feedback adjustment unit, the other end of the second resistor is grounded, and the other end of the second capacitor is grounded.

4. The voltage-stabilized power supply circuit of the NOR Flash chip according to claim 2 or 3, characterized in that: The feedback adjustment unit includes a third resistor, a fourth resistor, a sixth diode, a third capacitor, and a second transistor. One end of the third resistor is connected to the output end of the voltage input-output unit, the other end of the third resistor is connected to one end of the fourth resistor, one end of the third capacitor, and the base of the second transistor. The other end of the fourth resistor is grounded, the other end of the third capacitor is grounded, the emitter of the second transistor is connected to the cathode of the sixth diode, the anode of the sixth diode is grounded, and the collector of the second transistor is connected to the third input end of the voltage input-output unit.

5. The voltage-stabilized power supply circuit of the NOR Flash chip according to claim 1, characterized in that: The detection boost module includes: A boost judgment unit is used to detect whether the power supply voltage is lower than the reference voltage. If it is lower than the reference voltage, a square wave is generated to drive the boost to perform unit operation; The boost unit is used to boost the input power supply and output it to the voltage-stabilized power supply module when working; The input end of the boost judgment unit is connected to the power supply, the first output end of the boost judgment unit is connected to the input end of the boost operation unit, the second output end of the boost judgment unit is connected to the input end of the undervoltage alarm module, and the output end of the boost operation unit is connected to the second input end of the voltage stabilizing power supply module and the input end of the undervoltage alarm module.

6. The voltage-stabilized power supply circuit of the NOR Flash chip according to claim 5, characterized in that: The boost judgment unit includes a first amplifier, a first MOS tube, a second amplifier, and a fifth resistor. The in-phase end of the first amplifier is connected to a reference voltage, the inverting end of the first amplifier is connected to a power supply, the output end of the first amplifier is connected to the G pole of the first MOS tube and the input end of the boost unit, the D pole of the first MOS tube is connected to the power supply, the S pole of the first MOS tube is connected to the in-phase end of the second amplifier, the inverting end of the second amplifier is connected to a sawtooth wave, the output end of the second amplifier is connected to one end of the fifth resistor and the input end of the undervoltage alarm module, and the other end of the fifth resistor is connected to the input end of the boost unit.

7. The voltage-stabilized power supply circuit of the NOR Flash chip according to claim 5 or 6, characterized in that: The boost unit includes a second MOS tube, a first inductor, a third MOS tube, a third diode, and a fourth capacitor. The D pole of the second MOS tube is connected to the power supply, the G pole of the second MOS tube is connected to the first output end of the boost judgment unit, the S pole of the second MOS tube is connected to one end of the first inductor, the other end of the first inductor is connected to the D pole of the third MOS tube and the positive pole of the third diode, the S pole of the third MOS tube is grounded, the G pole of the third MOS tube is connected to the first output end of the boost judgment unit, the negative pole of the third diode is connected to one end of the fourth capacitor, the input end of the undervoltage alarm module, and the second input end of the voltage stabilizing power supply module, and the other end of the fourth capacitor is grounded.

8. The voltage-stabilized power supply circuit of the NOR Flash chip according to claim 1, characterized in that: The undervoltage alarm module includes: A pre-detection unit is used to determine whether the detection boost module works to boost the power supply, and after determining that the detection boost module works to boost the power supply, drive the alarm indication unit; An alarm indicating unit is used to determine whether the boosted power supply is less than a reference voltage. If it is less than the reference voltage, an alarm is issued to indicate insufficient voltage. The input end of the pre-detection unit is connected to the output end of the detection boost module, and the output end of the pre-detection unit is connected to the input end of the alarm indication unit.

9. The voltage-stabilized power supply circuit of the NOR Flash chip according to claim 8, characterized in that: The pre-detection unit includes a fifth diode, a sixth resistor, a seventh resistor, a fifth capacitor, a sixth capacitor, and a third AND gate. One end of the sixth resistor is connected to the output end of the detection boost module, the negative electrode of the fifth diode is connected to one end of the seventh resistor, the positive electrode of the fifth diode is connected to the output end of the detection boost module, the other end of the sixth resistor is connected to one end of the fifth capacitor and one end of the input end of the AND gate, the other end of the seventh resistor is connected to one end of the sixth capacitor and the other end of the input end of the AND gate, the other end of the fifth capacitor is grounded, the other end of the sixth capacitor is grounded, and the output end of the third AND gate is connected to the input end of the alarm indication unit.

10. The voltage-stabilized power supply circuit of the NOR Flash chip according to claim 8 or 9, characterized in that: The alarm indication unit includes a fourth amplifier, a speaker, and a fourth diode. The in-phase end of the fourth amplifier is connected to a reference voltage, the inverting end of the fourth amplifier is connected to the output end of the detection boost module, the power supply end of the fourth amplifier is connected to the output end of the pre-detection unit, the output end of the fourth amplifier is connected to one end of the speaker, the other end of the speaker is connected to the positive electrode of the fourth diode, and the negative electrode of the fourth diode is grounded.

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