Patent ID: 8412920

Claim:
A boot sequence method for a portable object having a plurality of pins of the portable object intended to be connected to a corresponding plurality of pins of a reader, the portable object having at least two communication interfaces connected to the plurality of pins of the portable object, and the reader having at least one communication interface connected to the plurality of pins of the reader, wherein the at least one communication interface of the reader is comprised in a list of communication interfaces comprising more communication interfaces than supported by the portable object, the method comprising: a determination step wherein a selected communication interface of the at least two communication interfaces of the portable object is determined for initiating a communication with the reader, a first starting step wherein the selected communication interface is started for communicating with the reader, a first negotiation step wherein a power negotiation is performed between the portable object and the reader for determining a compatible power range, a second negotiation step wherein a negotiation is performed between the portable object and the reader for determining a first communication interface of the at least one communication interface of the reader and a second communication interface of the at least two communication interfaces of the portable object to activate simultaneously, and a second starting step wherein the first communication interface and the second communication interface are started one after each other.