Method and system for dynamically distributing resources in microcontroller unit MCU

Abstract

The invention provides a method and a system for dynamically distributing resources in a microcontroller unit MCU. The MCU comprises a processor and a static random access memory, wherein the static random access memory comprises a plurality of memory blocks. The method comprises the following steps: the MCU receives a pre-set flash memory capacity which is configured by the processor when an application program is applied; the pre-set flash memory capacity is smaller than a maximum flash memory capacity of the static random access memory; a flash memory storage block for flash memory storage and an internal memory storage block for internal memory storage in the static random access memory are distributed according to the pre-set flash memory capacity; program data in the flash memory storage block is read and executed, and data interaction is carried out with the internal memory storage block. The method and the system can be suitable for requirements of different products, different customers and different application scenes, and a condition that the flash memory capacity is idle and wasted and the internal memory capacity is not enough is avoided.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of MCUs, and in particular, relate to a method and system for reading system configuration information in an MCU. Background technique [0002] Micro Control Unit (MCU), also known as Single Chip Microcomputer (SCM) or single-chip microcomputer, refers to the computer's central processing unit (Central Processing Unit, CPU), static random access memory (Static Random Access Memory, SRAM), read-only memory (Read-Only Memory, ROM), timer counter and various I / O interfaces are integrated on a chip to form a chip-level computer. Do different combination control for different application occasions. The entire SRAM is divided into a memory SRAM and a flash SRAM, the memory SRAM temporarily stores memory data, and the flash SRAM temporarily stores flash memory chip data. [0003] MCU is a general-purpose chip. According to individual needs, an MCU chip will generally customize multiple produ...

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Problems solved by technology

[0003] MCU is a general-purpose chip. According to individual needs, an MCU chip will generally customize multiple product series (several or even dozens of product series). The size of the flash SRAM in the chip is determined according to the largest flash memory capacity. The individual requirements of different products have different requirements for flash memory capacity. However, in many customized products, it is not necessary to support the largest flash memory capacity, which will cause some flash SRAMs to be idle and wasteful.

Moreover, when there is idle and wasted flash SRAM, the chip area will be larger than the actual demand, which is not conducive to chip miniaturization

[0004] On the other hand, the flash memory capacity and memory capacity of each product are fixed, so there are often cases where some flash memory SRAM is idle and wasteful, while the memory capacity is not enough

[0005] In addition, the area of ​​the entire SRAM is relatively large, so the probability of SRAM defects in chip production is relatively high. The general processing method is to discard the chip, but in fact not all SRAM blocks are defective. In case only part of the SRAM block is defective

In this way, only a small piece of SRAM has a defect in the production process, which will cause the entire chip to be discarded, resulting in a huge waste of chips

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