Data transmission method of SD card controller

A data transmission method and data transmission technology, which are applied in the field of data transmission of SD card controllers, can solve problems such as distinction
CN101840379AActive Publication Date: 2010-09-22苏州国芯科技股份有限公司
3 Cites 7 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
苏州国芯科技股份有限公司
Publication Date
2010-09-22

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a data transmission method of an SD card controller, which is characterized in that: in order to distinguish the transmitted data is common data or private data, a private sector is defined in a memory space of the SD card controller in advance, and a private data characteristic field and a characteristic value are defined; when the data is written, whether to operate the private sector is judged first, and then whether the characteristic value is matched is judged so as to distinguish common data and private data; before reading the private data, a private reading enabling instruction is first sent to start a private reading enabling state; and when the data is read, whether the private sector is to be operated is first judged, and then the common data and the private data are distinguished according to the private reading enabling state. The invention provides a private data transmission channel, can transmit the private data capable of extending the functions of an SD card or improving the performance of the SD card with the channel so as to realize the firmware updating, the secondary development, the starting safety control, the hardware module diagnosis and other functions of the SD card.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of SD cards, in particular to a data transmission method of an SD card controller. This data transmission method may distinguish whether the transmitted data is ordinary data used to realize the storage function of the SD card, or private data used to expand the function of the SD card or improve the performance of the SD card. The private data can be used to realize the firmware update of the SD card, Functions such as secondary development, safety control, and hardware module diagnosis. Background technique

[0002] SD card (Secure Digital Memory Card, Chinese translation is safe digital card) is a new generation memory device based on semiconductor flash memory, which has been used in portable devices such as digital cameras, personal digital assistants (PDA) and multimedia players. widely used. At present, the application of SD card is more and more extensive, and has been extended to some security app...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More