Multi-channel flash memory card control device and control method thereof

Abstract

The invention provides a multi-channel flash memory card control device and a control method thereof. The multi-channel flash memory card control device comprises a host interface unit, a command data processing unit and flash memory card interface units, wherein the host interface unit is a USB 3.0 protocol host interface unit, a plurality of flash memory card interface units independent of each other are eMMC protocol flash memory interface units, and the command data processing unit includes a command processing unit and a data processing unit. By dividing a command which is transmitted by the high-speed serial communication protocol host into a plurality of sub-commands to the flash memory card interface and by performing time-overlapped interaction of the commands and the data through the flash memory cards, the goals of extending access capacity and improving access speed are achieved, the use cost of the product is reduced and the use flexibility of the flash memory cards is extended.

Description

technical field [0001] The invention relates to a multi-channel flash memory card control device and a control method thereof, in particular to a multi-channel flash memory card control device and a control method based on a high-speed serial communication protocol. Background technique [0002] In recent years, the high-speed serial communication protocol has a tendency to completely replace the traditional parallel transmission protocol. For example, the serial hard disk interface (SATA) replaces the parallel hard disk interface (PATA), and the personal computer expansion express bus interface (PCI Express) replaces the personal computer expansion bus. At the same time, due to the characteristics of large capacity, small size, high speed and convenient use, flash memory cards have played an increasingly important role in daily work and life, and the transmission rates of various types of flash memory cards have also increased by leaps and bounds. , For example, the highest...

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Problems solved by technology

[0002] In recent years, the high-speed serial communication protocol has a tendency to completely replace the traditional parallel transmission protocol. For example, the serial hard disk interface (SATA) replaces the parallel hard disk interface (PATA), and the personal computer expansion express bus interface (PCI Express) replaces the personal computer expansion bus. At the same time, due to the characteristics of large capacity, small size, high speed and convenient use, flash memory cards have played an increasingly important role in daily work and life, and the transmission rates of various types of flash memory cards have also increased by leaps and bounds. , For example, the highest transmission rate of a secure digital card has reached 104 megabytes per second, and the highest transmission rate of a compact flash memory card has reached 167 megabytes per second. At this time, the traditional parallel transmission protocol can no longer meet the needs, so based on high-speed Flash memory card access products based on serial communication protocols have become a trend. Although the use of flash memory card access products based on high-speed serial communication protocols has increased the data transmission rate, it still has not fully utilized the bandwidth of high-speed serial communication protocols. The bottleneck lies in The transmission rate of the flash memory card, the multi-channel flash memory card control device and the control method thereof of the prior art regard the flash memory card as a plurality of data storage devices, and it performs the operation of reading and writing data respectively at different times, resulting in a huge increase in the bandwidth. Waste, therefore, a kind of multi-channel flash memory card control device and its control method that can make full use of the high-speed serial communication protocol transmission bandwidth will be sought after by the market

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