Nor FLASH memory interface module applied to configurable logic block (CLB) bus

Abstract

The invention provides a Nor FLASH memory interface module applied to a configurable logic block (CLB) bus. A Nor FLASH memorizer is communicated with a central processing unit (CPU) through the Nor FLASH memory interface module via the CLB bus, and the Nor FLASH memory interface module further comprises a power-on detection circuit, an address decoding circuit, a bad block replacing circuit, a write control circuit, a configuration register group and a state register group which is used for displaying a last-time operation state. An information block is arranged in the Nor FLASH memorizer and records bad block unit addresses, the number of bad block units, replacing unit addresses and function enabled information of the replacing unit replacing bad blocks, and a bad block register is arranged in the power-on detection circuit and used for storing the bad block information from the information blocks. According to the Nor FLASH memory interface module, the use ratio of Nor FLASH is improved to a larger degree, codes can be directly run on chips, the stability is excellent, the transmission speed is high, and the CPU resource consumption is small.

Description

technical field [0001] The invention relates to a built-in NorFLASH storage interface module applied to an SOC chip, in particular to a NorFLASH storage interface module applied to a CLB bus. Background technique [0002] NorFLASH can run code directly on the chip, with excellent stability and high transmission rate, which is very suitable for embedded systems as NorFLASH ROM. At present, NorFLASH has been widely used in SOC chips (System on Chip, called system-on-chip, also known as system-on-chip). Appropriate interface design is crucial to the application of NorFLASH on SOC chips. When reading and writing NorFLASH operations, it is necessary to control many control signals on it. If the NorFLASH control signals are directly implemented by register control, it will consume a lot of CPU resources, and the operation steps are cumbersome. It takes a lot of software resources to operate and replace the steps, and the software maintenance is more complicated. Therefore, how ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a NorFLASH storage interface module applied to the CLB bus. The NorFLASH storage interface module improves the utilization rate of NorFLASH to a greater extent; it can directly run code on the chip, with excellent stability and high transmission rate, which is very suitable for It is used in embedded systems as the advantage of NorFLASH ROM to solve the problem that there are many control signals on the NorFLASH port, but directly using register control will consume a lot of CPU resources and the operation steps are cumbersome; the operation is simple, the consumption of CPU resources is small, and it is convenient for software development

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