Data storage device based on SPI and its controlling method

摘要

A data storage device based on SPI includes an SPI circuit, a NAND flash memory for storing data, a NAND flash interface connected between the SPI interface and the NAND flash memory for controlling data transmission therebetween, an instruction controlling circuit connected between the SPI circuit and the NAND flash memory interface for converting an instruction received by the SPI circuit into an instruction recognizable to the NAND flash memory and a data converting circuit connected between the SPI circuit and the NAND flash memory interface for accomplishing conversion between serial data and parallel data. A data storage controlling method based on SPI is also disclosed. Thus a relatively small capacity and a relatively high price of a NOR flash memory based on SPI are avoided and costs are saved.

主权项

1. A data storage device based on SPI, comprising an SPI circuit, a NAND flash memory for storing data, a NAND flash memory interface connected between said SPI circuit and said NAND flash memory for controlling data transmission therebetween, an instruction controlling circuit connected between said SPI circuit and said NAND flash memory interface for converting instructions received by said SPI circuit into instructions recognizable to said NAND flash memory and a data converting circuit connected between said SPI circuit and said NAND flash memory interface for accomplishing conversion between serial data and parallel data;
wherein said instruction controlling circuit comprises an instruction resolving module for resolving operational instructions received by said SPI circuit, a high-capacity extension instruction module connected to said instruction resolving module, an instruction converting module connected to said instruction resolving module and said high-capacity extension instruction module and an instruction executing module connected to said instruction converting module.