The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2002
Filed:
Oct. 11, 2000
Serge F. Fruhauf, Saratoga, CA (US);
Herve Goupil, Provence, FR;
Robert Leydier, La Londe les Maures, FR;
Other;
Abstract
A dual-mode IC is provided for operating in first mode such as an ISO mode in accordance with International Standards Organization 7816 (ISO 7816) protocol, and a second, non-ISO mode, such as a USB mode in accordance with Universal Serial Bus (USB) protocol. The dual-mode IC is preferably in a smart card and includes a microprocessor, a switching block, and an external interface. The external interface includes a voltage supply pad, a reference voltage pad, a reset pad, a clock pad and an input/output pad in accordance with the ISO 7816 protocol, and a D-plus pad and D-minus pad in accordance with the USB protocol. The IC further includes a mode configuration circuit for detecting a USB mode condition on at least one of the D-plus and D-minus pads, and configuring the IC in the ISO mode or the USB mode depending on the result. Once the IC is configured in a particular mode, it will operate in only that mode until the next power-on reset sequence.