USB card reader capable of carrying OTG device

The utility model discloses a USB card reader capable of carrying an OTG device. The USB card reader is provided with a Mircro USB interface which is connected with an USB interface and an SD/TF card reading circuit, and the fourth pin of the Mircro USB interface is connected with the detection pin...

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Bibliographic Details
Main Authors XIA TINGXI, CHENG LIANG
Format Patent
LanguageEnglish
Published 28.01.2015
Subjects
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Summary:The utility model discloses a USB card reader capable of carrying an OTG device. The USB card reader is provided with a Mircro USB interface which is connected with an USB interface and an SD/TF card reading circuit, and the fourth pin of the Mircro USB interface is connected with the detection pin of the SD/TF card reading circuit through a first resistor. The USB interface, the SD/TF card reading circuit, and the Mircro USB interface are connected with one another, and the ID pin of the Mircro USB interface is connected with the detection pin of the SD/TF card reading circuit, so that the circuit can automatically determine whether the SD/TF card reading circuit is connected with a device or not and automatically convert work modes; and meanwhile, the plugging indication pin of an SD card connector and the plugging indication pin of a TF card connector are connected with the detection pin of the SD/TF card reading circuit, so that whether the cards are plugged or not can be automatically determined, and the automatic switching of the reading, charging or other operations of the card reader provided can be realized. The USB card reader capable of carrying the OTG device can be widely applied to the field of card readers.
Bibliography:Application Number: CN20142575728U