Pipeline type serial interface flash memory access device

Abstract

The invention provides a pipeline type serial interface flash memory access device. By realizing the pipeline specific hardware logic, the pipeline type access of a serial interface flash memory can be realized according to a user-defined pipeline access protocol. According to the pipeline type serial interface flash memory access device disclosed by the invention, with an access interface with a 2-bit I / O (Input-Output) space, the reading, writing, erasing and other operations of the serial interface flash memory can be realized; and the pipeline type serial interface flash memory access device can be matched with a corresponding arbitration mechanism, so that the off-line, in-band and out-of-band access methods can be provided, further, in the design of a hardware system, great flexibility for multi-path access of the serial interface flash memory can be greatly provided, and the system research and development cost and the debugging period of the serial interface flash memory can be reduced.

Description

technical field [0001] The invention relates to the field of embedded applications, in particular to a pipe-type serial interface flash memory access device enabling a hardware system to efficiently and flexibly realize access to a serial interface flash memory (SPI Flash Memory). Background technique [0002] In the current embedded system storage technology, flash memory (Flash Memory) has great advantages over EEROM in terms of capacity and cost. Therefore, in today's embedded systems, flash memory is often used to store system-critical code and data. The serial interface flash memory chip using the serial interface SPI (Serial Peripheral Interface, also known as "Serial Peripheral Interface") has the advantages of less package pins, small chip area, simple interface protocol, and high reliability. It is widely used in embedded applications. [0003] At present, when the embedded system reads, writes, and erases the serial interface flash memory, the CPU needs to read a...

AI Technical Summary

Problems solved by technology

[0005] The invention solves the problem that the use of the serial interface flash memory is limited in the embedded system, and the CPU takes up too much resources when accessing resources, and realizes a device for efficiently and flexibly accessing the serial interface flash memory in multiple ways, which can be used offline or out of band. 、 Realize reading, writing and updating of serial interface flash memory in three in-band states; by using command / data buffering, the CPU waiting caused by status polling is greatly reduced, and the CPU resource occupancy rate is reduced

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