Patent ID: 8272573

Claim:
A method for activating a preset contact assignment on a contact pad of a portable data carrier, comprising the following steps carried out in the portable data carrier: activating a first contact assignment in reaction to a first communication protocol present at the contact pad, the first communication protocol being assigned to a first portion of the contacts of the contact pad, and different contact assignments being activatable for the second portion of the contact pad not assigned by the first contact assignment; activating a second contact assignment in reaction to a second communication protocol present at the contact pad, while the first contact assignment is simultaneously activated; reserving at least one contact from the second portion of the contacts of the contact pad for a third contact assignment while the first contact assignment is activated; and checking for a collision of the second contact assignment with the reservation, the activation of the second contact assignment being effected in reaction to a second communication protocol present at the contact pad when the checking step yields no collision.