1. A voltage switching method for a chip for varying a voltage applied to the chip, the method comprising the steps of:

s1, setting a plurality of reference voltages;

s2, connecting a preset number of divider resistors and comparators in series;

s3, inputting and sequentially switching output voltages corresponding to the reference voltage to enable the divided voltage of the comparator to be equal to the reference voltage, and recording the maximum output voltage in the step as a skip voltage after traversing the reference voltage;

s4, increasing the number of series-connected voltage dividing resistors;

s5, ignoring the reference voltage corresponding to the output voltage smaller than the skipping voltage under the current series-connected voltage-dividing resistor;

and S6, repeating the steps S3-S5 until the required output voltage is obtained.

2. The voltage switching method for the chip according to claim 1, wherein the divided voltage of the comparator is equal to the divided voltage of each of the voltage dividing resistors.

3. The voltage switching method of claim 1, wherein the plurality of reference voltages are step voltages, and the output voltage is sequentially increased for the corresponding reference voltages to perform switching in step S3.

4. The voltage switching method for the chip according to claim 3, wherein the step value of the plurality of reference voltages is 40-60 mV.

5. The voltage switching method for the chip according to claim 1, wherein the reference voltage is 0.8-1.15V, and the number of the voltage dividing resistors is 4-8.

6. The voltage switching method for chips as claimed in claim 1, wherein the number of voltage dividing resistors added in series at a time in step S4 is one.

7. A voltage switching device for a chip, comprising:

the charge adjusting module is used for switching the output voltage in the line;

the comparator module is used for verifying whether the divided voltage is the reference voltage or not;

the reference voltage input module is electrically connected to the comparator module and is used for inputting different reference voltages to the comparator module;

the rheostat module is electrically connected with the charge adjusting module and the comparator module and is used for changing a voltage dividing resistor connected in series in a circuit;

the step skipping module records the maximum value of the previously accessed output voltage;

the charge adjusting module can input different reference voltages according to the reference voltage input module and correspondingly switch output voltages of the voltage dividing resistors in the circuit, so that the divided voltage on the comparator module is equal to the reference voltage;

the step-skipping module can record the maximum output voltage accessed before the varistor module changes the series divider resistor in the line each time as the step-skipping voltage, and the reference voltage input module can ignore the reference voltage corresponding to the output voltage smaller than the step-skipping voltage under the current series divider resistor.

8. The voltage switching device of claim 7, wherein the step-jump module is electrically connected to the varistor module or the comparator module.

9. An electronic device comprising a processor and a memory, said memory storing computer readable instructions which, when executed by said processor, perform the steps of the method of any of claims 1-6.

10. A storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, performs the steps of the method according to any one of claims 1-6.

Background

The operation of the nonvolatile memory is often read, write, erase. The principle of each operation is by applying a voltage to the non-volatile memory. For erase, a negative voltage (e.g., -10 v) is typically applied to the gate and a positive voltage (e.g., 6 v) is applied to the substrate. In practical chip designs, the erase voltage is often adjustable to account for chip variability.

The chip is generally used for outputting voltage through a charge pump, connecting a variable number of divider resistors and comparators, and gradually boosting and adjusting the output voltage according to the reference voltage and the divided voltage of the comparators, wherein the reference voltage is generally set to be a plurality of equal-difference voltages; in the specific switching process, taking 7 reference voltages which are sequentially increased as an example, the output voltage is firstly connected in series with a certain number of divider resistors, then the divided voltage on the output voltage comparator is gradually increased according to the 7 reference voltages to be equal to the corresponding reference voltages for switching, after the 7 voltages are switched, the divided voltage on the output voltage comparator is gradually increased according to the 7 reference voltages again to be equal to the corresponding reference voltages for switching by increasing the serially connected divider resistors, and the principle is that the resistance value in a line is increased to enable the corresponding output voltage when the divided voltage on the comparator is equal to the reference voltages to be increased. However, after the series-connected voltage-dividing resistor is added, the output voltage still traverses 7 reference voltages again for switching, in the process, a plurality of output voltages of the front part are smaller than the maximum output voltage before the series-connected voltage-dividing resistor is added, and the voltages obviously do not meet the chip operation requirements, namely, invalid voltages are generated, the voltage switching processing time is increased, and the chip processing efficiency is restricted.

In view of the above problems, no effective technical solution exists at present.

Disclosure of Invention

An object of the embodiments of the present application is to provide a voltage switching method and apparatus for a chip, an electronic device, and a storage medium, so as to avoid generation of an invalid voltage, reduce a corresponding operation processing time, and thereby improve a processing efficiency of the chip.

In a first aspect, an embodiment of the present application provides a voltage switching method for a chip, for changing a voltage applied to the chip, the method including the following steps:

s1, setting a plurality of reference voltages;

s2, connecting a preset number of divider resistors and comparators in series;

s3, inputting and sequentially switching output voltages corresponding to the reference voltage to enable the divided voltage of the comparator to be equal to the reference voltage, and recording the maximum output voltage in the step as a skip voltage after traversing the reference voltage;

s4, increasing the number of series-connected voltage dividing resistors;

s5, ignoring the reference voltage corresponding to the output voltage smaller than the skipping voltage under the current series-connected voltage-dividing resistor;

and S6, repeating the steps S3-S5 until the required output voltage is obtained.

The voltage switching method for the chip is characterized in that the divided voltage of the comparator is equal to the divided voltage of each voltage dividing resistor.

In the voltage switching method for a chip, a plurality of the reference voltages are step voltages, and the output voltages in step S3 are sequentially increased for the corresponding reference voltages to be switched.

The voltage switching method for the chip is characterized in that the stepping values of the reference voltages are 40-60 mV.

The voltage switching method for the chip is characterized in that the reference voltage is 0.8-1.15V, and the number of the voltage dividing resistors is 4-8.

In the voltage switching method for the chip, the number of the voltage dividing resistors added in series in step S4 is one.

In a second aspect, an embodiment of the present application provides a voltage switching apparatus for a chip, including:

the charge adjusting module is used for switching the output voltage in the line;

the comparator module is used for verifying whether the divided voltage is the reference voltage or not;

the reference voltage input module is electrically connected to the comparator module and is used for inputting different reference voltages to the comparator module;

the rheostat module is electrically connected with the charge adjusting module and the comparator module and is used for changing a voltage dividing resistor connected in series in a circuit;

the step skipping module records the maximum value of the previously accessed output voltage;

the charge adjusting module can input different reference voltages according to the reference voltage input module and correspondingly switch output voltages of the voltage dividing resistors in the circuit, so that the divided voltage on the comparator module is equal to the reference voltage;

the step-skipping module can record the maximum output voltage accessed before the varistor module changes the series divider resistor in the line each time as the step-skipping voltage, and the reference voltage input module can ignore the reference voltage corresponding to the output voltage smaller than the step-skipping voltage under the current series divider resistor.

The voltage switching device for the chip is characterized in that the step-skipping module is electrically connected to the varistor module or the comparator module.

In a third aspect, an embodiment of the present application further provides an electronic device, including a processor and a memory, where the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the steps in the method as provided in the first aspect are executed.

In a fourth aspect, embodiments of the present application further provide a storage medium, on which a computer program is stored, where the computer program runs the steps in the method provided in the first aspect when executed by a processor.

As can be seen from the above, in the voltage switching method, the voltage switching apparatus, the electronic device, and the storage medium for the chip provided in the embodiments of the present application, the method limits the range of the accessed reference voltage by recording the skip voltage, and skips the output voltage within the regulated range during the voltage switching process, thereby avoiding generation of an invalid voltage, and effectively reducing the corresponding operation processing time during the actual application process of the read/write/erase operation of the chip, thereby improving the processing efficiency of the chip.

Drawings

Fig. 1 is a flowchart of a voltage switching method for a chip according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a voltage switching device for a chip according to an embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of an embodiment 1 of a voltage switching device for a chip according to an embodiment of the present disclosure.

Fig. 4 is a distribution diagram of output voltages of an embodiment 1 of a voltage switching apparatus for a chip according to an embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of an embodiment 2 of a voltage switching device for a chip according to an embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

In a first aspect, please refer to fig. 1, fig. 1 is a voltage switching method for a chip in some embodiments of the present application, for changing a voltage applied to the chip, the method including the following steps:

s1, setting a plurality of reference voltages;

s2, connecting a preset number of divider resistors and comparators in series;

s3, inputting and sequentially switching output voltages corresponding to the reference voltage to enable the divided voltage of the comparator to be equal to the reference voltage, and recording the maximum output voltage in the step as a skip voltage after traversing the reference voltage;

s4, increasing the number of series-connected voltage dividing resistors;

s5, ignoring the reference voltage corresponding to the output voltage smaller than the skipping voltage under the current series-connected voltage-dividing resistor;

and S6, repeating the steps S3-S5 until the required output voltage is obtained.

In some preferred embodiments, the required output voltage is the output voltage required to complete the corresponding chip operation, such as the output voltage required to be reached during the read/write/erase operation.

According to the voltage switching method for the chip, the step-skipping voltage is set, so that after the series-connected voltage-dividing resistor is increased, the output voltage connected to the chip can be ignored and the reference voltage corresponding to the output voltage smaller than the step-skipping voltage is switched, the situation that after the series-connected voltage-dividing resistor is increased, the input output voltage is repeatedly input in the input output voltage range is avoided, namely, the input process of invalid voltage is avoided, the voltage switching efficiency is effectively improved, and the reading/writing/erasing operation process of the chip can be accelerated.

In some preferred embodiments, the reference voltage is used to correct and limit the output voltage, ensuring that the output voltage is within a controllable range and accurately reflecting the current value of the output voltage.

In some preferred embodiments, the preset number of voltage dividing resistors connected in series in step S2 is preferably the smallest, and if the adjustable range of the number of voltage dividing resistors in the line is 4-8, the preset number of voltage dividing resistors connected in series at the beginning in step S2 is 4, which is worth of obtaining a larger output voltage when more voltage dividing resistors are connected in series step by step in the subsequent process, so as to traverse the output voltage from small to large to obtain the required input and output voltage.

Specifically, in order to prevent the comparator from breaking down, the reference voltage connected to the comparator is in a set range, the number of voltage dividing resistors connected in series in the line needs to be adjustable by correspondingly increasing the input range of the output voltage, and the voltage dividing resistors are used for dividing the voltage so that the input range of the output voltage is larger in the set range of the reference voltage.

In some preferred embodiments, the divided voltage of the comparator is equal to the divided voltage of each voltage dividing resistor, that is, the resistance value of each voltage dividing resistor is equal and the resistance value of the input and output voltage line part of the comparator is equal to the resistance value of the voltage dividing resistor.

Specifically, since the divided voltage of the comparator is equal to the divided voltage of each voltage dividing resistor, the voltage value between the output voltage and the reference voltage is easier to convert, and if the number of the voltage dividing resistors connected in series is n, the output voltage = (n + 1) × the reference voltage when the line voltage is stable is favorable for setting the reference voltage and converting the output voltage.

More specifically, the comparator is used for comparing and feeding back whether the divided voltage of the output voltage on the comparator is equal to the reference voltage or not, so that the output voltage is quickly fed back and regulated to a required value corresponding to the current reference voltage, and the regulation process is as follows:

when the output voltage is connected to the comparator through a series of voltage division resistors, if the divided voltage generated by the output voltage is lower than the currently accessed reference voltage, and the output feedback of the comparator is 1, the output voltage is increased, so that the divided voltage on the comparator is increased; if the divided voltage generated by the output voltage is higher than the currently accessed reference voltage and the output feedback of the comparator is 0, reducing the output voltage to reduce the divided voltage on the comparator; through negative feedback regulation, the divided voltage of the output voltage on the comparator is equal to the reference voltage, the voltage value of the output voltage is ensured to be accurate, and the chip is favorable for accurately reading/writing/erasing operations.

In some preferred embodiments, the plurality of reference voltages are stepped voltages, and the output voltage is switched to be sequentially increased for the corresponding reference voltages in step S3.

Specifically, the plurality of reference voltages are step voltages, that is, the voltage values when the reference voltages are set are arithmetic progression numbers which are sequentially increased, so that the design values of the reference voltages are more balanced, and the regularity adjustment of the output voltages is facilitated, so that the voltage switching method of the embodiment of the application can more effectively and orderly obtain appropriate voltages to complete the accurate reading/writing/erasing operation of the chip.

In some preferred embodiments, the skipping voltage in step S3 is the skipping voltage in the round (i.e. the number of connected voltage-dividing resistors is not changed), the reference voltage with the largest voltage value corresponds to the input output voltage, if the reference voltage is between 0.5V and 1V and the number of connected voltage-dividing resistors is 4, the output voltage in the step is between 2.5V and 5V, and the output voltage of 5V corresponding to the reference voltage of 1V is the skipping voltage set in the step.

More specifically, the reference voltages ignored in step S4 are the reference voltages set in step S1, and if the reference voltage is between 0.5V and 1V and the number of connected voltage dividing resistors is 4, the output voltage in step S3 is between 2.5V and 5V, and the skip voltage is 5V; when the number of the access resistors is increased to 5, the output voltage is between 3V and 6V, the reference voltage corresponding to the output voltage below 5V is ignored at the time, and the reference voltage below 0.83V is ignored at the time according to the output voltage = (n + 1) × reference voltage, namely the reference voltage between 0.83V and 1V is traversed in the round step S3, so that the access of invalid output voltage is effectively skipped, the utilization rate of the voltage switching process is improved, and the efficiency of accurately performing reading/writing/erasing operation on the chip is greatly improved.

In some preferred embodiments, the step values of the plurality of reference voltages are 40-60 mV.

More specifically, in the present embodiment, the step value of the reference voltage is preferably 50mV, and the step value interval enables the output voltage to be appropriately subdivided, enabling the read/write/erase operation to be performed accurately.

In some preferred embodiments, the reference voltage is 0.8-1.15V, and the number of the voltage dividing resistors is 4-8.

Specifically, the reference voltage is set in the range of 0.8 to 1.15V, and the step value of 50mV is combined to make the embodiment of the present application have 8 reference voltages in total.

Specifically, the number of the divider resistors is 4-8, that is, 4 divider resistors connected in series in the initial state can be gradually increased to 8, that is, the resistance values of the connected resistors are 5; the output voltage which is switched in without calculating the reference voltage neglected according to the skipping voltage can generate 40 output voltages in total between 4V and 10.35V, which is enough to meet the regulation use of the output voltage in the chip operation.

In some preferred embodiments, the number of the voltage dividing resistors connected in series is increased by one at a time in step S4.

Specifically, after the number of series resistors is increased, the step value of the output voltage corresponding to the reference voltage set in a stepping mode is relatively increased, the output voltage generated by the reading/writing process requirement is lower than the output voltage generated by the erasing process requirement, and the required precision is high.

According to the voltage switching method for the chip, the range of the accessed reference voltage is limited by recording the step-skipping voltage, the output voltage in the regulated range is skipped in the voltage switching process, the generation of invalid voltage is avoided, and the corresponding operation processing time can be effectively reduced in the actual application process of reading/writing/erasing operation of the chip, so that the processing efficiency of the chip is improved.

Referring to fig. 2, in a second aspect, fig. 2 is a voltage switching device for a chip according to some embodiments of the present application, including:

the charge adjusting module is used for switching the output voltage in the line;

the comparator module is used for verifying whether the divided voltage is the reference voltage or not;

the reference voltage input module is electrically connected with the comparator module and used for inputting different reference voltages to the comparator module;

the rheostat module is electrically connected with the charge adjusting module and the comparator module and is used for changing a voltage dividing resistor connected in series in a circuit;

the step skipping module records the maximum value of the previously accessed output voltage;

the charge adjusting module can input different reference voltages according to the reference voltage input module and correspondingly switch output voltages of the voltage dividing resistors in the circuit, so that the divided voltage on the comparator module is equal to the reference voltage;

the step-skipping module can record the maximum output voltage accessed before the varistor module changes the series divider resistor in the line each time as the step-skipping voltage, and the reference voltage input module can ignore the reference voltage corresponding to the output voltage smaller than the step-skipping voltage under the current series divider resistor.

According to the voltage switching device for the chip, the maximum value of the output voltage which is connected in front is recorded by setting the step-skipping module, namely, the maximum output voltage tested before the varistor module changes the series-connected voltage-dividing resistor is recorded as the step-skipping voltage, so that the charge adjusting module can skip the output voltage in an adjusted range in the voltage switching process, namely, the output voltage exceeds the ignored reference voltage for switching comparison, the generation of invalid voltage is avoided, and in the actual application process of reading/writing/erasing operation of the chip, the corresponding operation processing time can be effectively reduced, and the processing efficiency of the chip is improved.

In some preferred embodiments, the step-jump module is electrically connected to the varistor module or the comparator module; specifically, when the step-skipping module is connected to the comparator module, the step-skipping voltage can be calculated by acquiring the output voltage division or the reference voltage in the comparator in combination with the current adjustment round; when the step-skipping module is connected with the rheostat module, the step-skipping voltage can be calculated by acquiring the number of the voltage-dividing resistors in the current series circuit and combining the reference voltage of the current round or the voltage-dividing resistor.

In some preferred embodiments, the voltage switching device further includes a grounding module connected to the line, so as to ground the voltage switching device for a chip according to the embodiments of the present application.

The following further describes a voltage switching device for a chip according to an embodiment of the present application with reference to the following embodiments:

example 1

As shown in fig. 3, the output voltage VPP in the line is connected to the charge pump, and the output voltage can be adjusted by the charge pump; the encoder decoder can correspondingly control the switches Sel _ x5, Sel _ x6, Sel _ x7, Sel _ x8 and Sel _ x9 to be opened and closed so as to change the resistor R connected in series in the circuit; the resistances of the resistors R are equal, wherein the number of the resistors R is 10, and the resistors R are respectively a disconnecting resistor, 4 voltage dividing resistors capable of being connected in series in a circuit, 4 voltage dividing resistors fixedly connected in series in the circuit and a grounding resistor from top to bottom; the output end of the comparator charge _ pump _ ctrl is connected with the charge pump charge, the anode is used for receiving the output voltage divided voltage vsample, and the cathode is used for receiving the reference voltage vref, so that the sizes of the two can be compared; the reference voltage controller Vref Control is connected to the negative terminal of the comparator charge _ pump _ ctrl and is used for recording and feeding back a reference voltage to calculate the step-skipping voltage.

In the embodiment, the reference voltage vref ranges from 0.8V to 1.15V, steps by 50mv, and the corresponding number vref _ trim is 0 to 7; correspondingly, the output voltage VPP is 0.8-10.35V.

The voltage switching device for the chip of the embodiment performs the voltage switching steps as follows:

1. the encoder decoder closes Sel _ x5, the number of voltage dividing resistors connected in series is 4 at this time, the reference voltage vref and the output voltage VPP are switched step by step according to the number vref _ trim, and the final output voltage VPP in the process is 5.75V;

2. the encoder decoder opens the Sel _ x5 and closes the Sel _ x6, the number of voltage dividing resistors connected in series is 5, the output voltages corresponding to 0-3 in the number vref _ trim are all lower than 5.75V, the switching process below the output voltage VPP is skipped, the reference voltage vref and the output voltage VPP are switched step by step directly from the number vref _ trim4, and the final output voltage VPP in the process is 6.9V;

3. similarly, the output voltage VPP is switched sequentially from Sel _ x7, Sel _ x8 and Sel _ x9 to directly obtain the output voltage VPP required by the read/write/erase operation of the chip.

Assuming that the output voltage VPP goes through the above process, a table (where the number on the strikethrough is the output voltage VPP skipped from the output) can be obtained, from which fig. 4 can be obtained;

as can be seen from the above table, in the voltage switching process, 19 voltage data are switched less, that is, the number of the regulated values of the output voltage VPP is 21/40, which effectively improves the efficiency of voltage switching.

As shown in fig. 4, the voltage switching method has fewer steps for forming voltage jumps, thereby effectively avoiding the output of invalid voltages, and in practical applications, the erase time can be reduced.

Example 2

As shown in fig. 5, the output voltage VPP in the line is connected to the charge pump, and the output voltage can be adjusted by the charge pump; the encoder decoder can correspondingly control the switches Sel _ x5_ m, Sel _ x6_ m, Sel _ x7_ m, Sel _ x8_ m and Sel _ x9_ m to be opened and closed so as to change the resistor R connected in series in the circuit; the resistances of the resistors R are equal, wherein the number of the resistors R is 10, and the resistors R are respectively a disconnecting resistor, 4 voltage dividing resistors capable of being connected in series in a circuit, 4 voltage dividing resistors fixedly connected in series in the circuit and a grounding resistor from top to bottom; the output end of the comparator charge _ pump _ ctrl is connected with the charge pump charge, the anode is used for receiving the output voltage divided voltage vsample, and the cathode is used for receiving the reference voltage vref, so that the sizes of the two can be compared; the switch controller Sel Control is arranged between the encoder decoder and the switch, and can record and feed back the number of the current series-connected divider resistors so as to calculate the step-jump voltage.

In the embodiment, the reference voltage vref ranges from 0.8V to 1.15V, steps by 50mv, and the corresponding number vref _ trim is 0 to 7; correspondingly, the output voltage VPP is 0.8-10.35V; the data obtained in this example are in accordance with the chart in example 1.

In a third aspect, referring to fig. 6, fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where the present application provides an electronic device 3, including: the processor 301 and the memory 302, the processor 301 and the memory 302 being interconnected and communicating with each other via a communication bus 303 and/or other form of connection mechanism (not shown), the memory 302 storing a computer program executable by the processor 301, the processor 301 executing the computer program when the computing device is running to perform the method of any of the alternative implementations of the embodiments described above.

In a fourth aspect, the present application provides a storage medium, and when being executed by a processor, the computer program performs the method in any optional implementation manner of the foregoing embodiments. The storage medium may be implemented by any type of volatile or nonvolatile storage device or combination thereof, such as a Static Random Access Memory (SRAM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), an Erasable Programmable Read-Only Memory (EPROM), a Programmable Read-Only Memory (PROM), a Read-Only Memory (ROM), a magnetic Memory, a flash Memory, a magnetic disk, or an optical disk.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.