CN-122001216-A - Pressure regulating system, system on chip and pressure regulating method

Abstract

The embodiment of the application discloses a voltage regulating system, a system on chip and a voltage regulating method, which are used for providing adjustable working voltage for the system on chip and considering the initialization requirement and the high-performance scene requirement of the system on chip. The voltage regulating system comprises a system on a chip and a power supply voltage control module. The system on chip is used for outputting a first PWM digital signal and a second PWM digital signal, and the power supply voltage control module is coupled with the system on chip and used for obtaining an output voltage signal according to a first duty ratio of the first PWM digital signal, a second duty ratio of the second PWM digital signal and a reference voltage of the power supply voltage control module, and the output voltage signal is used for providing power supply voltage for the system on chip.

Inventors

• ZHAO PENGFEI
• TAN LIJUAN

Assignees

• 华为技术有限公司

Dates

Publication Date

20260508

Application Date

20200214

Claims (20)

1. 1. A voltage regulating system, comprising: the system on a chip is used for outputting a first Pulse Width Modulation (PWM) digital signal and a second PWM digital signal; and the power supply voltage control module is coupled with the system on chip and is used for obtaining an output voltage signal according to the first duty ratio of the first PWM digital signal, the second duty ratio of the second PWM digital signal and the reference voltage of the power supply voltage control module, and the output voltage signal is used for providing power supply voltage for the system on chip.
2. 2. The voltage regulating system of claim 1, wherein the output voltage signal provides a supply voltage to the system-on-chip that is an operating voltage of the system-on-chip in an initialization scenario when the first PWM digital signal is low and the second PWM digital signal is high.
3. 3. The voltage regulating system of claim 1, wherein the output voltage signal provides a supply voltage to the system-on-chip that is an operating voltage of the system-on-chip in an initialization scenario when the first PWM digital signal is high and the second PWM digital signal is low.
4. 4. A voltage regulating system according to any one of claims 1 to 3, wherein when both the first PWM digital signal and the second PWM digital signal are low, the output voltage signal provides a supply voltage for the system-on-chip that is an operating voltage of the system-on-chip in a high performance scenario.
5. 5. A voltage regulating system according to any one of claims 1 to 3, wherein the output voltage signal provides a supply voltage for the system-on-chip that is an operating voltage of the system-on-chip in a high performance scenario when the first duty cycle is less than a first preset value and the second duty cycle is less than a second preset value.
6. 6. The pressure regulating system of any one of claims 1-5, further comprising: The peripheral circuit is used for converting the first PWM digital signal into a first feedback signal and converting the second PWM digital signal into a second feedback signal; The peripheral circuit is further configured to divide the power supply voltage of the system on chip to obtain a third feedback signal, and feedback the first feedback signal, the second feedback signal, and the third feedback signal to the power supply voltage control module; The power supply voltage control module is specifically used for: And obtaining the output voltage signal according to the first feedback signal, the second feedback signal, the third feedback signal and the reference voltage of the power supply voltage control module.
7. 7. The voltage regulation system of claim 6, wherein the peripheral circuit comprises: the first filter circuit is used for converting the first PWM digital signal into the first feedback signal and feeding the first feedback signal back to a feedback voltage input end of the power supply voltage control module; The second filter circuit is used for converting the second PWM digital signal into the second feedback signal and feeding back the second feedback signal to the feedback voltage input end; and the voltage dividing circuit is used for dividing the power supply voltage to obtain the third feedback signal and feeding the third feedback signal back to the feedback voltage input end.
8. 8. The voltage regulation system of claim 7, wherein the voltage divider circuit comprises a first resistor and a second resistor, a first end of the first resistor coupled to a port of the system-on-chip for receiving the supply voltage, a second end of the first resistor coupled to the feedback voltage input and a first end of the second resistor, a second end of the second resistor coupled to the ground; The first filter circuit comprises a third resistor, a fourth resistor and a first capacitor, wherein a first end of the third resistor is coupled with a port of the system-on-chip for outputting the first PWM digital signal, a second end of the third resistor is coupled with a first end of the first capacitor and a first end of the fourth resistor, a second end of the fourth resistor is coupled with the feedback voltage input end, and a second end of the first capacitor is coupled with the ground end; The second filter circuit comprises a fifth resistor, a sixth resistor and a second capacitor, wherein a first end of the fifth resistor is coupled with a port of the system-on-chip for outputting the second PWM digital signal, a second end of the fifth resistor is coupled with a first end of the second capacitor and a first end of the sixth resistor, a second end of the sixth resistor is coupled with the feedback voltage input end, and a second end of the second capacitor is coupled with the ground end.
9. 9. The voltage regulating system of claim 7 or 8, wherein the peripheral circuit further comprises: And the output filter circuit is coupled with the voltage output end of the power supply voltage control module and is used for carrying out filter processing on the output voltage signal to obtain the power supply voltage of the system-on-chip.
10. 10. A system-on-chip, characterized in that the system-on-chip is configured to: outputting a first PWM digital signal and a second PWM digital signal; And receiving the power supply voltage of the system on chip provided by a power supply voltage control module, and working under the drive of the power supply voltage of the system on chip, wherein the power supply voltage is obtained by the power supply voltage control module according to the first duty ratio of the first PWM digital signal, the second duty ratio of the second PWM digital signal and the reference voltage of the power supply voltage control module.
11. 11. The system on a chip of claim 10, wherein the power supply voltage is an operating voltage of the system on a chip in an initialization scenario when the first PWM digital signal is low and the second PWM digital signal is high.
12. 12. The system on a chip of claim 10, wherein the power supply voltage is an operating voltage of the system on a chip in an initialization scenario when the first PWM digital signal is high and the second PWM digital signal is low.
13. 13. The system on a chip of any of claims 10 to 12, wherein the power supply voltage is an operating voltage of the system on a chip in a high performance scenario when both the first PWM digital signal and the second PWM digital signal are low.
14. 14. The system on a chip of any of claims 10 to 12, wherein the power supply voltage is an operating voltage of the system on a chip in a high performance scenario when the first duty cycle is less than a first preset value and the second duty cycle is less than a second preset value.
15. 15. A method of regulating pressure, comprising: The voltage regulating system acquires a first PWM digital signal and a second PWM digital signal; And the voltage regulating system obtains an output voltage signal according to the first duty ratio of the first PWM digital signal, the second duty ratio of the second PWM digital signal and the reference voltage of the power supply voltage control module, and the output voltage signal is used for providing power supply voltage for the system on chip.
16. 16. The method of claim 15, wherein the output voltage signal provides a supply voltage for the system-on-chip that is an operating voltage of the system-on-chip in an initialization scenario when the first PWM digital signal is low and the second PWM digital signal is high.
17. 17. The method of claim 15, wherein the output voltage signal provides a supply voltage for the system-on-chip that is an operating voltage of the system-on-chip in an initialization scenario when the first PWM digital signal is high and the second PWM digital signal is low.
18. 18. The method of any of claims 15 to 17, wherein the output voltage signal provides a supply voltage for the system-on-chip that is an operating voltage of the system-on-chip in a high performance scenario when both the first PWM digital signal and the second PWM digital signal are low.
19. 19. The method of any of claims 15 to 17, wherein the output voltage signal provides a supply voltage to the system-on-chip that is an operating voltage of the system-on-chip in a high performance scenario when the first duty cycle is less than a first preset value and the second duty cycle is less than a second preset value.
20. 20. The method according to any one of claims 15 to 19, wherein the voltage regulating system obtains an output voltage signal according to the first duty cycle of the first PWM digital signal, the second duty cycle of the second PWM digital signal, and the reference voltage of the power supply voltage control module, specifically comprising: converting the first PWM digital signal to a first feedback signal; converting the second PWM digital signal to a second feedback signal; dividing the power supply voltage of the system on chip to obtain a third feedback signal; And obtaining the output voltage signal according to the first feedback signal, the second feedback signal, the third feedback signal and the reference voltage of the power supply voltage control module.

Description

Pressure regulating system, system on chip and pressure regulating method The present application is a divisional application, the application number of which is 202080096610.X, the date of the original application is 14 months 2020, the entire contents of the original application are incorporated herein by reference. Technical Field The application relates to the technical field of chips, in particular to a voltage regulating system, a system on chip and a voltage regulating method. Background A system on chip (SoC) is an integrated circuit for implementing specific functions, including complete system hardware and embedded software. In view of comprehensive consideration of performance and power consumption, different working voltages need to be provided for processors inside the SoC under different working scenarios. The existing SoC voltage regulation scheme may be as shown in fig. 1. In the scheme, the SoC outputs pulse width modulation (pulse width modulation, PWM) digital signals with adjustable duty ratio, different duty ratios correspond to different analog voltage values, and the SoC adjusts the power supply voltage control module through the output PWM digital signals, so that the output voltage signals of the power supply voltage control module output working voltages required by a processor in the SoC after passing through a peripheral circuit. In practical application, vout of the input SoC needs to meet the working requirements of different application scenes of the SoC, namely, the minimum value of Vout cannot be lower than the minimum voltage V1 required by the processor, 2, in order to meet the high-performance scene requirement of the processor, the maximum value of Vout cannot be lower than the working voltage V2 required by the processor in the high-performance scene, 3, in the initialization process of the SoC, an intermediate voltage value V3 between V1 and V2 needs to be provided for the processor so as to meet the initialization requirement of the SoC. Then, the scheme shown in fig. 1 has a problem that the duty ratio of the PWM digital signal cannot be set during the initialization of the SoC, and the PWM pin can only output a high level (corresponding to a duty ratio of 1) or a low level (corresponding to a duty ratio of 0). When the PWM pin outputs high level, the value of Vout is minimum, in practical application, the minimum voltage requirement of the SoC can be met only when the value of Vout at the high level of PWM pin output is larger than V1, but because the value of Vout at the high level of PWM pin output is far smaller than V3, the value of Vout cannot be used as working voltage at the time of initializing the SoC, when the value of Vout at the low level of PWM pin output is maximum, if the value of Vout at the low level of PWM pin output is set to V3, although the initializing requirement of the SoC can be met, the SoC cannot provide working voltage V2 (V2 is larger than V3) required in a high-performance scene because the value of Vout at the low level of PWM pin output is the maximum voltage which can be provided by the SoC, therefore, the processor cannot support the working in the high-performance scene, and if the value of Vout at the low level of PWM pin output is set to V2, the value of Vout is not equal to V3 (V3 is smaller than V2), the initializing requirement of the SoC is difficult to meet in the initializing process. Therefore, the SoC voltage regulation scheme provided by the prior art has the problem that the initialization requirement and the high-performance scene requirement are difficult to be compatible. Disclosure of Invention The embodiment of the application provides a voltage regulating system, a system on chip and a voltage regulating method, which are used for providing adjustable working voltage for the system on chip and considering the initialization requirement and the high-performance scene requirement of the system on chip. In a first aspect, an embodiment of the present application provides a voltage regulating system, including a system on a chip and a supply voltage control module. The system on chip is used for outputting a first PWM digital signal and a second PWM digital signal, and the power supply voltage control module is coupled with the system on chip and used for obtaining an output voltage signal according to a first duty ratio of the first PWM digital signal, a second duty ratio of the second PWM digital signal and a reference voltage of the power supply voltage control module, and the output voltage signal is used for providing power supply voltage for the system on chip. With the voltage regulating system provided in the first aspect, the system on chip outputs two PWM digital signals, namely, the first PWM digital signal and the second PWM digital signal, and when the system on chip is initialized, the first PWM digital signal may be configured to be high level (corresponding to a duty ratio of 1) or low level (correspon