All-in-one access device and access method thereof

Abstract

The invention provides an all-in-one access device and an access method thereof which are used for preventing a user from inserting the access device into more than two storage media with same transmission specifications by mistake and causing data access failure or data destruction. The all-in-one access device comprises two connecting pieces, an error detection circuit and a control chip, wherein each connecting pieces is used for inserting one storage medium with special specification and at least comprises a card detection pin, the control chip correspondingly accesses data of the storage media inserted in the connecting pieces, and the error detection circuit is used for correspondingly opening or closing the access function of the control chip through comparing the voltage potential of the card detection pins. The access method is used for correspondingly enabling or forbidding the access function of the control chip by judging whether the voltage potentials of two same card detection pins exist.

Description

technical field [0001] The present invention relates to an all-in-one access device and its access method, in particular to an all-in-one access device that can prevent users from accidentally inserting two or more storage media with the same transmission specification, resulting in data access failure or even data damage. An access device and its access method. Background technique [0002] At present, the existing all-in-one memory card access devices (commonly known as card readers) can be roughly divided into two types. One is to separate the access interfaces of each type of memory card without sharing the control chip. It is to share the control chip with multiple memory card access interfaces. The former is a packaging method that directly connects the pins on the interface to the pins of the control chip, and the latter uses a small number of pins. Compared with the former packaging method, the manufacturing cost can be saved. [0003] However, this kind of access ...

AI Technical Summary

Problems solved by technology

[0003] However, this kind of access device that shares a control chip with multiple memory card access interfaces, for memory cards with the same transmission specification (also known as transmission protocol) (such as Secure Digital (Secure Digital (SD) card) and micro Secure Digital Memory Card (Mirco-SD card), only one memory card can be inserted at the same time for access, otherwise it is easy to cause malfunction or access failure, and in serious cases, it may even cause memory card internal data corruption

[0004] Therefore, how to design an all-in-one access device, which can prevent the problem of data access failure or damage caused by mistakenly inserting two or more memory cards with the same transmission specification, has long been a problem for people in the relevant professional field. goal of improvement

Images