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Method for promoting transmission speed of memory card

A technology of transmission speed and memory card, which is applied in the field of data storage card, can solve the problems of non-existence, limited data transmission rate, inflexible operation, etc., achieve the effect of speed saving, simple and feasible operation process, and increase transmission rate

Inactive Publication Date: 2009-03-11
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of this method is: just carry out expansion and realize differential transmission on the basis of MMC card standard version 3.31, there is conflict with existing universal memory card (MMC card standard version 4.1 and SD card standard version 1.01) on the use of pins; It has a switching mechanism from ordinary transmission mode (mode of transmitting signals through single-ended signals) to high-speed differential transmission mode (mode of transmitting signals through differential signals) and from high-speed differential transmission mode to common transmission mode, and the operation is not flexible; at the same time, its The data transfer rate is also relatively limited

Method used

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  • Method for promoting transmission speed of memory card
  • Method for promoting transmission speed of memory card
  • Method for promoting transmission speed of memory card

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Embodiment Construction

[0051] The design concept of the present invention: the present invention expands on the basis of the existing memory card system, and adopts the realization mechanism of expanding contacts on the back of the common memory card to improve the data transmission speed of the memory card.

[0052] The present invention realizes signal transmission by differential signal pairs by adding the same number of pins at the corresponding positions on the back of the ordinary memory card, and registers the CSD register (Card Specific Data) of the ordinary memory card. This register is used to indicate and record the normal state of the memory card. Conditions required for operation) to add a flag to the corresponding position to indicate whether the memory card of the card reader supports high-speed differential transmission mode, and add a corresponding switch between normal transmission mode and high-speed differential transmission in the control flow of the ordinary memory card The comm...

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Abstract

A method for improving the transmission speed of memory card comprises the expansion of tube feet at the back of the common memory card, adding touch points on the slot of the card, adding difference comparator, high speed difference transmission channel and control signal at the main bus drive circuit, new subset of the control logic, adding orders for switching common transmission mode and high speed difference transmission mode of the memory card from the order list, adding corresponding bit in the status register of the memory card to show the transmission mode of the memory card, adding corresponding marking place in the CSD register of the common storage card to show whether the memory card supporting the high speed difference transmission mode. It improves the data transmission rate of the memory card with the realization of the mode identification and switch system.

Description

technical field [0001] The invention relates to a data storage card, in particular to a method for increasing the transmission speed of the storage card. Background technique [0002] Single-ended signal is the most basic method of interconnecting two logic devices, and it only needs one connection to realize logic signal transmission. The digital logic standards for single-ended signal connection mainly include TTL, CMOS, LVTTL, LVCMOS, PCI, etc. [0003] The differential signal is transmitted through a pair of single-ended signal lines, and the signals on the two lines are the same, but the phase difference is 180°. From the point of view of the signal transmission principle, the level amplitude of the differential signal is lower than that of the single-ended differential signal; in addition, the differential signal receiving end VDIFF=VOH-VOL, which can offset the common mode superimposed on the two single-ended signals during the actual transmission process Noise, bet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/38
Inventor 曹会扬
Owner POTEVIO INFORMATION TECH CO LTD
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