×

Data transmission method and card therefor

  • US 6,840,454 B1
  • Filed: 09/02/1999
  • Issued: 01/11/2005
  • Est. Priority Date: 09/11/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. A portable article of the smart card type, the article comprising firstly a body and secondly an integrated circuit chip (9), said integrated circuit chip (9) having a central processor unit (CPU) connected via a data and address bus to memories (ROM, RAM, EEPROM), and further including at least a first contact pad (VCC) suitable for providing the chip (9) with a power supply voltage, a second contact pad (GND) suitable for grounding the chip (9), a third contact pad (D+) and a fourth contact pad (D−

  • ), said contact pads (VCC, GND, D+, D−

    ) being electrically connected respectively to a first contact area (C1), a second contact area (C5), a third contact area (C4), and a fourth contact area (C8) of a set of eight contact areas (C1, C2, C3, C4, C5, C6, C7, C8) flush with a surface of the article body, the third and fourth contacts pads (D+, D−

    ) being connected to an interface of the chip (9) and being suitable for providing data transmission under the control of the central processor unit (CPU), the chip (9) further including a fifth contact pad (VPP), a sixth contact pad (RST) suitable for resetting the chip (9), a seventh contact pad (CLK) suitable for providing the chip with a clock signal, and an eighth contact pad (I/O) suitable for inputting and outputting data signals using an asynchronous protocol, said sixth, seventh, and eighth contact pads (RST, CLK, I/O) being connected electrically respectively to a sixth contact area (C2), a seventh contact area (C3), and an eighth contact area (C7) of the set of eight contact areas flush with the surface of the article body.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×