Device access method, device, controller and storage medium

Abstract

The invention relates to a device access method, a device, a controller and a storage medium. The device access method comprises the following steps: accessing the device to be accessed based on the access timing generated according to the parameter configuration value, wherein the parameter configuration value comprises a timing parameter configuration value, based on the key parameter set of thedevice to be accessed, the parameter configuration value is obtained by using numerical optimization algorithm to deal with the preset function model, the key parameter set includes device timing parameters, the preset function model aims to minimize the distance function, the distance function is the difference between the expected access throughput for accessing the device to be accessed and the ultimate throughput. The embodiments of the present invention fully parameterize to generate the access timing of the controller, and realize the approximation of the limiting access performance ofthe device to be accessed through abstract modeling of the device timing parameters and solving by using a numerical optimization algorithm inside the device.

Description

technical field [0001] The present application relates to the technical field of storage systems, in particular to a device access method, device, controller and storage medium. Background technique [0002] Compared with Nor Flash, Nand Flash has the characteristics of high storage density and fast erasing data, and is widely used in embedded systems. With the improvement of system scale and complexity, the amount of data that needs to be stored / read in the Nand Flash device as the system storage unit increases rapidly, and the traditional device access method is likely to cause access performance bottlenecks, whether it is in the production stage of the equipment system, operation stage, there is an urgent demand for high-speed access to Nand Flash devices. Compared with Nor Flash devices, the interface timing of Nand Flash devices is very complicated, and the parameters of Nand Flash devices produced by different manufacturers are also very different. At present, there i...

AI Technical Summary

Problems solved by technology

With the improvement of system scale and complexity, the amount of data that needs to be stored / read in the Nand Flash device as the system storage unit increases rapidly, and the traditional device access method is likely to cause access performance bottlenecks, whether it is in the production stage of the equipment system, operation stage, there is an urgent demand for high-speed access to Nand Flash devices

Compared with Nor Flash devices, NandFlash devices have very complex interface timing, and the parameters of Nand Flash devices produced by different manufacturers are also very different. At present, there is an urgent need for fast, efficient and general-purpose Nand Flash control units that can effectively meet application requirements.

[0003] The current access to Nand Flash is implemented in various ways. The common control unit includes a dedicated controller integrated in the ASIC (Application Specific Integrated Circuit) device and a FPGA (Field-Programmable Gate Array, Field Programmable Gate Array). During the process, the inventors found that there are at least the following problems in the traditional technology: the actual device access performance is significantly lower than the limit access performance of the device

Images