System and detection method for realizing low-voltage real-time detection of an SoC chip

Abstract

The invention belongs to the field of system-on-chip design, and provides a system for realizing low-voltage real-time detection of an SoC chip and a detection method thereof. Wherein the register bank within the CPU comprises a plurality of registers corresponding to different voltage levels of the VBAT voltage respectively, The processor of the on-chip power management module performs step-by-step monitoring of the VBAT voltage according to the value of each register to generate the corresponding interrupt, and the CPU performs a low-power process according to the fast response of the interrupt type. Through the setting of multiple VBAT voltage grades, multiple VBAT voltage grades can be monitored at the same time, early warning, enriching the low-voltage detection function, and expanding the application range.

Description

technical field [0001] The invention belongs to the field of system design on a chip, and in particular relates to a system and a detection method for realizing low-voltage real-time detection of SoC chips. Background technique [0002] In consumer System on Chip (SoC) chip applications, for chip power management, low voltage detection (Low Voltage Detect, LVD) modules are generally used for low power detection, such as figure 1 shown. [0003] The detection principle is: the DC-DC converter is an external module of the SoC chip, which is used to convert the external battery supply voltage (VBAT voltage) of the SoC chip into the working voltage (VDD voltage) of the SoC chip. The central processing unit controls the analog / digital conversion controller by operating internal registers, and then controls the analog / digital converter to sample the VMID voltage and the VBG voltage. The LVD module obtains the current VBAT supply voltage through calculation based on the sampling ...

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a system for realizing low-voltage real-time detection of SoC chips, aiming at solving the problem that the prior art uses an LVD module with fixed voltage gear settings to perform low-voltage detection on SoC chips, and cannot configure multiple gears for simultaneous detection. Monitoring, early warning, problems with great limitations

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