Patent ID: 11954548
Assignee: STMICROELECTRONICS (GRAND OUEST) SAS
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 18:
19. A method, comprising:
receiving a smart card in a connector that includes:
a first electric contact configured to come into contact with a first electric contact area of the smart card which is intended to receive a power supply voltage;
a second electric contact configured to come into contact with a second electric contact area of the smart card which is intended to receive a reference voltage; and
a third electric contact configured to come into contact with a third electric contact area of the smart card which is a three-state output; and

selectively driving the three-state output to:
the power supply voltage in order to turn on a first light-emitting diode coupled to the three-state output and turn off a second light-emitting diode coupled to the three-state output;
the reference voltage in order to turn off the first light-emitting diode coupled to the three-state output and turn on the second light-emitting diode coupled to the three-state output; and
a high-impedance state in order to turn off the first light-emitting diode and the second light-emitting diode.