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Standard deviation (SD) composite device and read-write method thereof

A composite device and protocol conversion technology, applied in the electronic field, can solve problems such as inability to exchange data with different interfaces, achieve the effect of reducing complexity and improving communication quality

Active Publication Date: 2013-06-05
GUANGDONG ECAR TELEMATICS SERVICE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an SD composite device and its reading and writing method, aiming to solve the problem that the traditional SD card can only realize the data communication function between the SD card I / O interfaces, and cannot exchange data with different interfaces. question

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  • Standard deviation (SD) composite device and read-write method thereof

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0019] see figure 1 , the SD composite device provided by the present invention is packaged into a common SD card structure, which includes a gold finger, an SD protocol conversion chip, a TF card and serial port peripherals, the SD protocol conversion chip is connected to the gold finger through an SDIO interface, and the SD The protocol conversion chip is connected to the TF card through the SDIO interface protocol, and connected to the 2.4G wireless chip through the RS232 serial port protocol. The TF card is provided with a map module and a central control module responsible for the interactive data between the map module and the SD protocol conversion chip. The central control module in the present invention is a wince embedded syste...

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Abstract

The invention discloses a standard deviation (SD) composite device and a read-write method of the SD composite device. The SD composite device comprises an SD protocol conversion chip, a storage medium and a peripheral serial port, wherein the SD protocol conversion chip is connected with the storage medium through a secure digital input and output card (SDIO) interface protocol and connected with a wireless chip of 2.4G through a recommend standard 232 (RS232) serial port protocol. A map module and a center control module are arranged in the storage medium, wherein the center control module is responsible for data interaction between the map module and the SD protocol conversion chip. The SD protocol conversion chip is used for achieving conversion between an SDIO interface and an RS232 interface. The SD composite device and the read-write method of the SD composite device can achieved the above functions by means of adding the wireless communication module of 2.4G and an interface conversion module to the SD composite device, the complexity of the whole system can be reduced to a certain extent, and the communication quality of the system can be improved.

Description

technical field [0001] The invention relates to the field of electronics, in particular to an SD composite device and a reading and writing method thereof. Background technique [0002] SD card is a new generation memory device based on semiconductor flash memory, it is widely used in portable devices, SD card has high memory capacity, fast data transfer rate, great mobility flexibility and good security . [0003] At present, SD cards are mainly used in navigation products to store map software and related data. In the entire navigation system, because of the need to frequently receive information points and related status inquiries, the WINCE central control program of the vehicle MCU will frequently interact with the map software in the SD card. Therefore, the capacity of the SD card, the access speed and the versatility of the SD card I / O interface will all affect the communication quality of the entire system. The traditional SD card chip can only realize the data co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K17/00G06K19/07H04B5/00
Inventor 殷建红周川张小龙李玉杰陈竹明曾瑞月林义明洪杰王忠
Owner GUANGDONG ECAR TELEMATICS SERVICE