Structure and method for realizing concurrent reading and concurrent writing of IP of synchronous dual-port memory

Abstract

The invention provides a synchronous dual-port memory IP based method for realizing the concurrent-read and concurrent-write operation. In the IP of the synchronous dual-port memory, when the reading and writing operation is performed on the same address at the same time, a reading and writing conflict at ports appears, so errors occur in the reading and writing operation. The method solves the problem of reading and writing conflict at the ports with a selective reading and writing control strategy and realizes the operation of reading original data in a memory first and then writing new data into the address in the same period. The method has the advantage of effectively solving the problem of reading and writing conflict at the ports of a dual-port memory; besides, a memory system withrelatively stable performance can be obtained by designing in the method; and the whole design can be realized by an automated tool, and the design is portable, so the development cycle of a product can be shortened.

Description

Background technique [0001] For a system with multiple processors, it needs to access the memory at the same time, which will cause serious data bus contention. And this can be avoided by adopting special structured memory, such as multi-port memory. Currently, multi-port memories, especially dual-port memories are widely used in data communication devices. [0002] For general synchronous dual-port memory intellectual property (Intellectual Property, referred to as IP), usually when the same address is read and written at the same time, it will cause errors in the read and write operations. The specific situation is as follows: When one port performs a read operation while another port performs a write operation on the address at the same time, the read data is wrong. The data read at this time can neither be guaranteed to be the original data on the address, nor can it be guaranteed to be the newly written data, but an uncertain value; when the two ports perform the read o...

AI Technical Summary

Problems solved by technology

It increases the instability of the system and makes the design non-portable to different processes

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