Nand flash memory simulator

Abstract

The invention discloses a nand flash memory simulator which comprises a communication interface, a control logic unit, a memory and an interface conversion logic, wherein the communication interface is used for being communicated with a terminal and is connected through a bus; the control logic unit is used for exchanging data with the communication interface and configuring the interface conversion logic; the memory is used for storing data; and the interface conversion logic is used for simulating data. The control logic unit converts information received from the communication interface toconfiguring information to the interface conversion logic, the interface conversion logic is configured by the configuring information, and then the interface conversion logic receives Nand Flash order and data for simulation and reports the simulating order and data to a host machine or other terminals through the control logic unit at the same time. The invention can really simulate Nand Flash with various types and monitor the order and data simulating the Nand Flash, and the service life of the memory unit is almost infinite.

Description

technical field [0001] The invention relates to a Nand Flash system, in particular to a Nand Flash (ie Nand Flash, NAND type Flash) emulation device. Background technique [0002] Nand Flash is called Nand in English due to the relationship between its storage unit structure and NAND gate. Its advantages are large single-chip capacity, fast read and write speed, long data storage time and low price, so it is more and more widely used, almost applied to All digital consumer electronics products. But Nand Flash also has many disadvantages: limited service life (the number of erasing and writing of a single chip is generally 10,000 times), a wide variety (there are large pages, small pages, 8-bit types, 16-bit types, and different page sizes in large pages), There may be bad blocks when leaving the factory (a block is a storage unit of Nand Flash, ranging in size from 16KB to 512KB) and the interface speed is not uniform, which also brings inconvenience to actual application a...

AI Technical Summary

Problems solved by technology

But Nand Flash also has many disadvantages: limited service life (the number of erasing and writing of a single chip is generally 10,000 times), a wide variety (there are large pages, small pages, 8-bit types, 16-bit types, and different page sizes in large pages), There may be bad blocks when leaving the factory (a block is a storage unit of Nand Flash, ranging in size from 16KB to 512KB) and the interface speed is not uniform, which also brings inconvenience to actual application and design

[0003] In the existing technical solutions, the defect of service life is solved by using an equalization algorithm, and the defect of bad blocks is solved by a mapping table. These technologies can well solve the technical problems of Nand Flash in actual product applications, but In the product design process, especially in the testing process, there are new problems to be solved

[0004] In the system using Nand Flash, especially in the design verification and testing phase, in order to be compatible with all types of Nand Flash, it is necessary to use various types of Nand Flash test samples, and there are many types, and the testing phase is for Flash operations (reading, writing, erasing) And back copy) will be a lot and there is no protection of wear balance, it is easy to damage the Flash, and at the same time, the real data in the Nand Flash and the real command received cannot be seen during the test phase, which brings a lot of inconvenience to the system debugging

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