Off-chip online programmable SOC (system on a chip) and control method for same

Abstract

The invention relates to the technical field of design of an SOC (system on a chip), in particular to an off-chip online programmable SOC (system on a chip) and a control method for the same. The system comprises an SOC, an off-chip Nflash / Norflash storage and an off-chip switch, the SOC comprises a minimum SOC, a serial port controller, an Nflash / Norflash controller and a reset control CCU (central control unit) module, and the minimum SOC comprises a CPU (central processing unit), an internal storage and an on-chip bus. The control method for the system includes: compiling software on a computer, switching the SOC into a programming mode by means of selection control of the off-chip switch, downloading compiled executable file data into the off-chip Nflash / Norflash storage, and then switching the SOC into a normal operating mode to realize system operation. The system and the control method for the system are not only beneficial to development of a software system, but also easy to debug, and the chip is not easy to damage during debugging.

Description

technical field [0001] The invention relates to the technical field of SOC design, in particular to an off-chip on-line programmable SOC system and a control method thereof. Background technique [0002] At present, SOC chips have been widely used in various fields, and there are two ways for the software storage carrier of SOC chips, one is Flash in the SOC chip, and the other is Nflash / Norflash outside the chip. The download method of software data is different. [0003] On-chip Flash software data download and storage methods are as follows: figure 1 As shown, after the software executable file is generated on the PC side, the data is downloaded to the serial port of the SOC chip through the serial port, and then the data is written into the Flash through the flash controller inside the chip. The advantage of this method is that the software can directly download the generated program data to Flash, which is very convenient for system debugging. The disadvantage is that...

AI Technical Summary

Problems solved by technology

The advantage of this method is that the off-chip Nflash / Norflash is large enough to support complex software systems. The disadvantage is that it is very troublesome for software system debugging. Every time the program is modified, the Nflash / Norflash chip needs to be soldered down first. The programmer burns the software into Nflash / Norflash, and then solders it to the PCB board, which virtually increases the risk of damage to the chip due to soldering

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