Multi-mode smart card, system and associated methods
US6883715B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 11, 2000 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Feb 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07733
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multi-mode IC is provided for operating in a 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 multi-mode IC is preferably in a smart card and includes a microprocessor and an external interface. The external interface comprises a voltage supply pad, a ground pad, a first set of pads for the first mode, and 2 second set of pads for the second mode. The first set of pads preferably include a reset pad, a clock pad and an input/output pad in accordance with the ISO 7816 protocol, and may also include a variable supply voltage pad in accordance with the ISO 7816 protocol. The IC further includes a mode configuration circuit for detecting a mode condition on one pad of the first set of pads, and configuring the IC in the ISO mode or the non-ISO 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.