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Data grading processing method and system of micro control unit mcu

A micro control unit, data classification technology, applied in the direction of input/output to record carrier, etc.

Active Publication Date: 2019-04-26
GIGADEVICE SEMICON (BEIJING) INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, with the improvement of applications, the demand for flash memory chip capacity will also increase. In the past, only 128Kbytes of flash memory chip capacity could meet most of the needs, but with the improvement of customer applications, it will further expand

Method used

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  • Data grading processing method and system of micro control unit mcu
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Embodiment Construction

[0064] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0065] At present, the memory management schemes of embedded systems are as follows:

[0066] 1. The first type: embedded flash memory chip, the flash memory chip and MCU chip are made into one chip. The advantage of this technology is that the area is small, but due to the complexity of the flash memory chip process, the cost is also high. And at present, the main disadvantage is that the reading speed of the flash memory chip is slow (the general speed may be several megahertz to tens of megahertz), while the reading speed of the main chip of the MCU may reach more than 100 megabytes. The program data in a flash memory chip may take 2 or 3 waiting cycles, so the efficiency of program operation will be greatly reduced.

[0067] ...

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Abstract

The invention provides a data stage treatment method and system of an MCU (Microprogrammed Control Unit). The method comprises the following steps: in an MCU operation process, when program data needs to be read from a nonvolatile memory, judging whether the program data is in a second main storage part or not; if the program data is in the second main storage part, reading the program data from the second main storage part; if the program data is not in the second main storage part, judging whether the program data is in a second auxiliary storage part or not; and if the program data is in the second auxiliary storage part, reading the program data from the second auxiliary storage part. The method is used for giving consideration to program data reading efficiency and the supportable volume of the nonvolatile memory.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a data hierarchical processing method of a micro control unit MCU and a data hierarchical processing system of a micro control unit MCU. Background technique [0002] MCU (Micro Control Unit, Micro Control Unit), also known as SCM (Single Chip Microcomputer, single-chip microcomputer) or single-chip microcomputer, refers to the computer CPU (Central Processing Unit, Central processing unit), RAM (Random Access Memory, random access memory), ROM (Read-Only Memory, read-only memory), timer counter and various I / O (Input / Output, input / output interface) are integrated on a chip , form a chip-level computer, and do different combination controls for different applications. [0003] The MCU chip requires cooperation between the main chip and the flash memory chip to complete various data operations. Flash memory chips are generally used to store user program data and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06
Inventor 王南飞李宝魁
Owner GIGADEVICE SEMICON (BEIJING) INC
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