Switching device for RS-232 serial port and USB serial port

Details Switching device for RS-232 serial port and USB serial port Switching device for RS-232 serial port and USB serial port

2008-07-08

2008-07-08

Tsai, Henry (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

C710S031000, C710S062000, C710S072000, C710S107000, C307S112000, C307S139000

Reexamination Certificate

active

11016744

ABSTRACT:
A switching device for RS-232 serial port and USB serial port is adapted to simultaneously provide a RS-232 serial port and a USB serial port for a micro-processor with a single USART. The switching device can automatically switch to select either of the RS-232 serial port or the USB serial port as a main interface for communicating with other external computer facilities and related peripheries. When one of the serial ports is selected as the main communication interface to communicate with one of external computers, the other one serial port thereof still can transmit signals from the micro-processor to another computer through its transmitting data pin (TXD).

REFERENCES:
patent: 4058735 (1977-11-01), Tippner
patent: 4528459 (1985-07-01), Wiegel
patent: 5961611 (1999-10-01), Oh
patent: 6355936 (2002-03-01), Mastio
patent: 6601124 (2003-07-01), Blair
patent: 2003/0118055 (2003-06-01), Fecher et al.
patent: 2004/0133722 (2004-07-01), Croyle et al.
patent: 2002215276 (2002-07-01), None

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