Flash memory card used for differential data transmission

A memory card and flash technology, which is applied to record carriers used in machines, collaborative devices, instruments, etc., can solve problems such as bandwidth limitations of flash memory cards

CN102214315AInactive Publication Date: 2011-10-12SUPER TALENT ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2011-10-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

A flash memory card used for differential data transmission comprises a differential data path which can be used for communication between the flash memory card and a host device, a differential signal is used for execution, the differential data path can be used for translation between differential signals and specific storage card signals so as to control reading / writing-in operations of a memory bank array of the flash memory card, the specific memory card signals can be signals of standard multimedia memory cards, safety digital memory cards, memory stick memory cards or compact flash memory cards and the like, the host device can contain a similar differential data path so as to provide the differential data transmission capability; and the differential data transmission is utilized instead of non-known clock data transmission, so that the integral data bandwidth between the flash memory card and the host device can be greatly increased, and the energy consumption and pin demands can be reduced.
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Description

technical field

[0001] The present invention relates to a removable memory card interface, and more particularly, the present invention relates to a high-speed and low-power interface for flash memory cards. Background technique

[0002] Flash memory cards are widely used to store digital images captured by digital cameras. Secure Digital memory card (Secure Digital; SD) format is a very useful memory card format, which is an extension of the earlier developed Multi Media Card (Multi Media Card; MMC) format. Secure Digital memory card (SD) is a thin And it has an area the size of a postage stamp. Another digital file memory card format is a memory stick memory card (Memory Stick; MS) released by Sony (Sony), which looks a bit like a piece of chewing gum. The compact flash memory card (Compact Flash; CF) is another type of flash memory card, roughly square in shape, and its size is larger than that of a media memory card (MMC) and a secure digital memory card (SD). [0003...

Examples

Embodiment Construction

[0115] Conventional flash memory cards and devices using these flash memory cards have relatively low data transfer rates, which can limit the performance of these flash memory cards for bandwidth-intensive applications. With the differential data transfer protocol enabled for use with flash memory cards, the data transfer rate to / from these flash memory cards can be significantly increased without requiring additional pins or increasing the size of the overall memory card.

[0116] The differential data transfer function can be combined with the legacy function (clock data transfer) to increase the compatibility of the flash memory card. For example, a Secure Digital memory card adapted to use a high-speed serial bus could be called a Very-high-speed SD card (VSD card) and be able to communicate with a Very-high-speed SD card The host is an ultra-high-speed secure digital memory card host, an ultra-high-speed secure digital memory card with old functions, which can be used as...