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Method and system for realizing input/output (IO) expansion through standard secure digital (SD) memory interface

A storage interface, standard technology, applied in the field of TF card, can solve the problem that non-smart phones do not have it

Inactive Publication Date: 2010-12-08
融创天下(上海)科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, SD / IO is only equipped on some high-end mobile phones, and most non-smart phones do not have this capability

Method used

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  • Method and system for realizing input/output (IO) expansion through standard secure digital (SD) memory interface
  • Method and system for realizing input/output (IO) expansion through standard secure digital (SD) memory interface
  • Method and system for realizing input/output (IO) expansion through standard secure digital (SD) memory interface

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Embodiment Construction

[0025] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings: as figure 1 Shown, is the flow chart diagram of the inventive method

[0026] Step S1: the TF card is integrated with a flash storage space, and a coprocessor is expanded on the TF card; the standard TF card has a flash (flash memory) part, which only has a storage function and does not have a streaming communication function. The present invention The standard TF card has a flash (flash memory) part, compatible with SD card specification 1.0.1, compatible with physical layer protocol specification 1.1, compatible with MicroSD card specification V1.0, and supports two communication protocols: SD mode and SPI mode; in addition, and Expand a coprocessor on the TF card, the coprocessor is a SIP mobile media processor, because it is mainly used in mobile terminals, in addition to the performance indicators meeting the needs of customers, the system pow...

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Abstract

The invention relates to a method and a system for realizing input / output (IO) expansion through a standard secure digital (SD) memory interface. The method comprises the following steps of: integrating a flash memory space in a transflash (TF) card and expanding a coprocessor on the TF card; partitioning the address space of the flash memory space into two sections, wherein a second section is special for the coprocessor; uniformly addressing the addresses of the two sections of address space, wherein a file allocation table 32 (FAT32) file table is configured in a first-section address space; mapping a physical address to a file address, namely writing an address table of a second-section address space into the FAT32 file table in the first-section address space; and allowing an application program to access the physical address of the second-section address space by using the address table written into the second-section address space in the FAT32 file table. The method and the system can be flexibly applied to data communication on the premise of following SD memory specifications, so that various external apparatuses such as the coprocessor, a global positioning system (GPS) navigation module and the like can be expanded for all mobile phones supporting SD memory cards and a memory function can also be kept at the same time.

Description

technical field [0001] This article relates to a TF card extended with a coprocessor, in particular to a method and system for implementing SDIO expansion through a standard SD storage interface. Background technique [0002] SDIO defines a peripheral interface on the SD standard. Currently, SDIO has two main applications - removable and non-removable. Current removable devices serve as extensions for Palm and Windows Mobile, adding Bluetooth, cameras, GPS and 802.11b capabilities. Non-removable equipment follows the same electrical standards, but is not required to meet physical standards. Some phones contain 802.11 chips that connect to the CPU via SDIO. This move uses "precious" I / O pin resources for more important functions. [0003] Bluetooth, cameras, GPS, and 802.11b devices have profiles defined just for them. These application profiles are very similar to the class profiles defined for PCI and USB devices. They allow any host device to "talk" to any peripheral...

Claims

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Application Information

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IPC IPC(8): G06F13/38G06F17/30G06F9/38G06F9/445G06F1/32G06K19/07H04M1/725H04M1/72409
CPCG06F3/0679G06F3/0607G06F3/0643
Inventor 马国强
Owner 融创天下(上海)科技发展有限公司
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