High-speed low-power-consumption embedded memory card

Abstract

The invention provides a high-speed low-power-consumption embedded memory card, comprising a memory for storing data, a main control circuit and a command filtering module, wherein the main control circuit is connected with the memory and used for controlling work of the memory card, and the command filtering module is connected with the main control circuit and a card reader respectively and used for filtering requests of not operating the memory, sent by the card reader. In the invention, the command filtering module is arranged between the card reader and the main control circuit of the memory card and is used for pre-filtering the requests of not carrying out a reading / writing / erasing operation on the memory, so that the working load of the main control circuit can be reduced, the main control circuit is enabled to process the reading / writing / erasing command requests only, the power consumption of the memory card is reduced, the software code compiling is simple, the maintenance is easy, the data space is saved and the response speed of the system is increased. The memory card is especially suitable to being applied to the embedded memory card system having low power consumption and low cost.

Description

technical field [0001] The invention relates to the technical field of embedded systems, in particular, the invention relates to an embedded memory card with high speed and low power consumption. Background technique [0002] With the rapid development of the IC industry, the embedded system (Embedded System) has become a branch with the greatest growth potential in the electronic information industry. Along with the mass application of mobile terminals such as mobile phones, PDA, GPS, MP3 / 4, DV, etc., the market of embedded systems is increasing at an annual rate of about 30% (IDC forecast). At present, a large number of memory cards are used in embedded systems to store data in time. However, with the widespread use of memory cards, the low power consumption, strong real-time performance and cost of the memory card itself have become the most important link in the design of embedded systems, and it is a problem that many designers must face. [0003] As various embedded ...

AI Technical Summary

Problems solved by technology

[0006] 1. The main control circuit is in the working state for a long time and needs to work frequently, and the main control circuit is the main power-consuming part of the memory card, which will inevitably increase the power consumption of the entire system, which is in line with the low power consumption requirements in embedded system design diverge from each other;

[0007] 2. Each request sent by the card reader requires the main control circuit to respond, which makes the system software code complex and difficult to develop and maintain, and this will inevitably increase the firmware space;

[0008] 3. Each request sent by the card reader needs to be responded by the main control circuit, which needs to handle a large number of command interruptions, which will inevitably lead to a reduction in real-time processing

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