System on chip, and method and apparatus for port function initialization for system on chip

Abstract

The invention discloses a method for port function initialization for a system on chip. The method comprises the steps that the system on chip is powered on; a nonvolatile storage space sends a zone bit to a start control program of the system on chip; the start control program judges whether the system on chip is powered on initially or not according to the zone bit; if the system on chip is not powered on initially, the nonvolatile storage space sends an interrupt flag to the start control program of the system on chip to enable the start control program to skip a program segment process of port initialization by software; and a configuration circuit reads the configuration information in the nonvolatile storage space to configure the port of the system on chip. According to the method, when the system on chip is powered on for more than one time, hardware rapid response is executed and the port function initialization is carried out, so that the efficiency of the system from powering on to the port function initialization is improved, and the instantaneity and the reliability of the system are reinforced. The invention also discloses an apparatus for port function initialization for the system on chip and the system on chip including the apparatus.

Description

technical field [0001] The invention relates to the field of embedded technology, in particular to a method for initializing port functions of an on-chip system, a device for initializing the port functions of an on-chip system, and an on-chip system. Background technique [0002] The current embedded field is developing rapidly, and the functions of single-chip microcomputers and system-on-chips are becoming more and more powerful. Since each single-chip microcomputer and system-on-chip contains many complex functions, the ports of the system-on-chip are gradually becoming more complex in function and multiplexing, and even each pin corresponds to three, four or more multiplexing. function, so that the application can support the development and use of multiple functions, wherein the function of the port is dynamically switched during use. [0003] Whenever the MCU and the SoC start to work, the port functions of the MCU and the SoC will first be assigned as the initializa...

AI Technical Summary

Problems solved by technology

[0004] From the beginning to work of the above-mentioned current single-chip microcomputer and system-on-chip, there are still some deficiencies and limitations in the way of initializing the function of the external port: when the single-chip microcomputer and system-on-chip are powered on each time and start to work, they need to go through a software initialization process of the port. In order to meet the application needs of the system, and the software initialization process is actually a process executed by the software driver, which takes a certain amount of processing time, especially in the case of a system with a large number of ports and functions, or a system with a low operating frequency , takes longer to process

In addition, in applications with high immediacy requirements, the function of the external port may need to operate correctly in a very short time after the system is powered on, and the way the software initializes the port faces great limitations.

At the same time, the operation and operation risk of software initialization is greater than the risk of system hardware logic control initialization, and the reliability is relatively low

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