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USB (universal serial bus) card reading controller

A controller and card reading technology, applied in the direction of input/output to record carrier, etc., can solve the problems of long time-consuming, large-scale implementation, etc., and achieve the effects of timely response, compact structure, and reduced system consumption

Inactive Publication Date: 2012-07-04
BEIJING MXTRONICS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] However, since the MCU needs to have a complete instruction fetching, decoding and execution circuit, it also needs to configure the corresponding program memory and data memory, and its implementation scale is relatively large.
In addition, the MCU controls the process by executing instruction sequences and interrupt responses, and it takes a long time to process external events.

Method used

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  • USB (universal serial bus) card reading controller
  • USB (universal serial bus) card reading controller
  • USB (universal serial bus) card reading controller

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Embodiment Construction

[0026] The present invention will be further introduced below in conjunction with the accompanying drawings.

[0027] The USB card reader controller implements the function of transferring data between the USB host and the memory card. The present invention designs a USB card reader controller structure, which does not contain a main control MCU, and all work flow control is realized by hard-connected logic. Multiple workflow control state machines manage the workflow in a decentralized manner to realize various functions of the card reader.

[0028] Such as image 3 As shown, the USB card reader controller is divided into 4 parts by function:

[0029] 1) USB device interface SIE_BOX

[0030] 2) Memory card interface module CARD_BOX

[0031] 3) Data read and write control module RW_PROC

[0032] 4) Data buffer management MMU

[0033] The USB device interface SIE_BOX is an interface for communicating with the USB host and exchanging commands and data with the USB host. T...

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Abstract

The invention discloses a USB (universal serial bus) card reading controller which comprises a data buffer area management module, a USB equipment interface module, a memory card interface module and a data reading and writing control module, wherein the USB equipment interface module is used for realizing the endpoint layer of equipment; the memory card interface module is used for controlling the memory card operation process; and the data reading and writing control module is used for controlling the data reading and writing. With the adoption of the USB card reading controller, the circuit scale of the USB card reading controller is decreased, and the data transmission speed is improved.

Description

technical field [0001] The invention relates to a USB card reader controller. Background technique [0002] At present, the USB card reader is being widely used, and its control chip realizes the function of transmitting data between the USB host and each memory card. The common structure of the USB card reader control chip is based on the on-chip microcontroller MCU (Micro Control Unit), and the MCU executes the firmware program to control other components on the chip. Such as figure 1 As shown, the USB device interface is responsible for sending and receiving data between the USB host and realizing the main functions required by the USB protocol. The card interface realizes the functions stipulated by the protocol of the memory card and exchanges data between the memory cards. On-chip MCU controls these interfaces to complete the data transmission process. [0003] USB device interface such as figure 2 shown. The serial interface engine SIE (Serial Interface Engine)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
Inventor 谢俊玲宗宇张志永谷羽宋晶峰褚晓滨王莉
Owner BEIJING MXTRONICS CORP
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