Data exchangeable usb device and method therewith
OwnerChing-Fu Hung, Kung-Wang Lee +1inventors
InventorsChing-Fu Hung, Kung-Wang Lee, Shih-Chou Juan
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Abstract
The embodiment of the present invention provides an USB device that can be directly connected to another USB device to allow data exchange to take place without involving a use of a computer. Further, the embodiment of the invention also exploits a MP3 codec to allow voice data to be played or recorded via the USB device of the embodiment of the invention.
Claims16
A data-exchangeable universal serial bus (USB) device, comprises:
- a transceiver for electrically and mechanically connecting to an external USB device;
- an USB host core circuit, electrically connected to the transceiver and providing a communication with the external USB device when a host-mode signal is set to be a first logic level;
- an USB device core circuit, electrically connected to the transceiver and providing a communication with the external USB device when the host-mode signal is set to be a second logic level;
- a mass storage device for storing the data;
- a buffer device, electrically connected to the mass storage device, the USB host core circuit and the USB device core circuit, for temporarily storing the data;
- and
- a control device, for controlling the mass storage device, the buffer device, the USB host core circuit and the USB device core circuit, wherein the data-exchangeable USB device does not include an ID detect circuit for identifying the external USB device operating at a host mode or a device mode.
A method of data exchanging between a first universal serial bus (USB) device and a second USB device, wherein the first USB device comprises an USB host core circuit and a device core circuit, the method comprising:
- electrically and mechanically connecting the first USB device and the second USB device;
- and
- generating a host-mode signal to configure the first USB device to alternatively electrically provide a communication with the second USB device, wherein when a host-mode signal is set to be a first logic level, the USB host core circuit electrically communicates with the second USB device, and when the host-mode signal is set to be a second logic level, the USB device core circuit electrically communicates with the second USB device, wherein the first logic level is complementary to the second logic level, wherein the first USB device does not perform an ID detecting step for identifying the second USB device operating at a host mode or a device mode.
Dependencies are inferred from the claim text.