Storage framework of embedded system

Abstract

The invention provides a storage framework of an embedded system. The framework comprises a master control chip which comprises a data memory; a central processing unit connected with the data memory; an ROM (read only memory) program memory connected with the central processing unit, wherein an operating program of the storage framework of the embedded system is stored; and an RAM (random access memory) configurable memory connected with the central processing unit for being configured to another data memory or another program memory according to demand. The framework provided by the invention mixes advantages of the ROM and RAM program memories, and configures code storage plans freely according to demand, and considers the cost and the expandability of function. Meanwhile, the framework provided by the invention has the advantages of low cost, expandable program space and convenience in maintenance and upgrade. Almost applications can be met by an elastic system framework.

Description

technical field [0001] The present invention relates to the technical field of embedded system storage, in particular, the present invention relates to an embedded system storage architecture. Background technique [0002] Embedded systems need to select a suitable main control chip for different applications due to cost considerations, and main control chips with different storage architectures usually have large differences in cost. The program memory of the main control chip is usually divided into two types: ROM (read-only memory) type and RAM (random access memory) type. The cost of the ROM type solution is low, but it is difficult to modify the code and expand the function. The RAM type requires an external memory, and the cost is high, but the function expansion and update are more convenient. [0003] For the design of an embedded system, the design of the storage architecture is one of the key factors. Not only must the specific application be considered, but also ...

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Problems solved by technology

[0005] The cost of the RAM type system is higher than that of the ROM type system because the external memory is required, but the advantage is that the program space is larger, the function can be made stronger, and the program modification and upgrade are relatively easy, which is convenient for problem correction and function expansion. It is suitable for applications with many changes; the advantage of the ROM type system is that the manufacturing cost is low, but the program space is limited and it is not easy to modify. Once the program has bugs or some functions need to be upgraded, it will bring relatively high repair and maintenance costs. Suitable for applications with relatively simple functions and few changes

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