Smart card and method that modulates traffic signaling indicative of operational attributes of the smart card and/or transactions between the smart card and USB port of a USB host

• US 6,772,956 B1
• Filed: 03/31/2003
• Issued: 08/10/2004
• Est. Priority Date: 03/31/2003
• Status: Active Grant

• Current Assignee: Axalto S A
• Original Assignee: STMicroelectronics Incorporated (STMicroelectronics NV)
• Inventors: Leaming, Taylor J.
• Primary Examiner(s): Le, Thien M.
• Assistant Examiner(s): Labaze, Edwyn
• Application Number:
  US10/403,854
• Time in Patent Office: 498 Days
• Field of Search: 235/492, 235/380, 235/375, 235/441, 235/449, 235/382, 235/379, 710/63, 710/110, 710/107, 710/300, 710/301, 710/305
• US Class Current: 235/492
• CPC Class Codes: G06K 19/073 Special arrangements for circuits, e.g. for protecting identification code in memory protection against unauthorised use of computer memory G06F12/14
• CPC Class Codes: G06K 19/077 Constructional details, e.g. mounting of circuits in the carrier
• CPC Class Codes: G06K 19/07703 the interface being visual
• CPC Class Codes: G06K 19/07733 the record carrier containing at least one further contact interface not conform ISO-7816

Abstract

A smart card includes a card body and integrated circuit carried by the card body, including a microprocessor operative for communicating with a host and driving a signaling device indicative of smart card transactions between the smart card and a USB port of the host. The microprocessor is operative for modulating the signaling device based on operational attributes of the smart card and/or transactions between the smart card and USB port of the host.

Claims

1. A smart card comprising:

a card body; and

an integrated circuit carried by the card body and comprising a microprocessor for communicating with a host, an input/output terminal, and an activation logic circuit and driver counter operatively connected to said microprocessor and input/output terminal, and operative for driving a signaling device operatively connected to said input/output terminal and indicative of smart card transactions between the smart card and a USB port of the host, wherein one of at least said activation logic circuit and driver counter includes microprocessor controlled registers and/or counters, and operative for modulating the signaling device based on operational attributes of the smart card and/or transactions between the smart card and USB port of the host and allowing additional context sensitive information to be conveyed by the signaling device.

2. The smart card according to claim 1, wherein the microprocessor is operative for generating a signal for activating an LED as the signaling device and modulating the LED based on operational attributes of the smart card device and/or transactions between the smart card and USB port of the host.

3. The smart card according to claim 1, wherein the microprocessor is operative for modulating the signaling device based on host OUT transactions.

4. The smart card according to claim 1, wherein the microprocessor is operative for modulating the signaling device based on host IN transactions.

5. The smart card according to claim 1, wherein the microprocessor is operative for modulating the signaling device based on USB error conditions.

6. The smart card according to claim 1, wherein the microprocessor is operative for modulating the signaling device based on device busy conditions.

7. The smart card system according to claim 1, wherein the microprocessor is operative for modulating the signaling device based on USB transfer type for the transaction.

8. The smart card according to claim 1, wherein the microprocessor is operative for modulating the signaling based on endpoints involved in a transaction.

9. The smart card according to claim 1, wherein the microprocessor is operative for modulating the signaling based on smart card USB configuration.

10. The smart card according to claim 1, wherein the microprocessor is operative for modulating the signaling based on alternate settings within the smart card.

11. The smart card according to claim 1, wherein the microprocessor is operative for modulating the signaling based on vendor specific requests.

12. The smart card according to claim 1, wherein the microprocessor is operative for disabling the signaling by generating a disable signal to the signaling device.

13. A method for signaling smart card transactions between a Universal Serial Bus (USB) smart card and USB port of a host comprising the steps of:

signaling a transaction between the smart card and the USB port using a signaling device operatively connected to an activation logic circuit and driver counter, at least one of the activation logic circuit or driver counter having microprocessor controlled registers and/or counters; and

modulating the signaling based on operational attributes of the smart card and/or transactions between the smart card and USB port of the host and allowing additional context sensitive information to be conveyed by the signaling device.

14. The method according to claim 13, and further comprising the step of modulating the signaling based on host OUT transactions.

15. The method according to claim 13, and further comprising the step of modulating the signaling based on host IN transactions.

16. The method according to claim 13, and further comprising the step of modulating the signaling based on USB error conditions.

17. The method according to claim 13, and further comprising the step of modulating the signaling based on device busy conditions.

18. The method according to claim 13, and further comprising the step of modulating the signaling based on USB transfer type for a transaction.

19. The method according to claim 13, and further comprising the step of modulating the signaling based on endpoints involved in a transaction.

20. The method according to claim 13, and further comprising the step of modulating the signaling based on USB configuration.

21. The method according to claim 13, and further comprising the step of modulating the signaling based on alternate settings.

22. The method according to claim 13, and further comprising the step of modulating the signaling based on vendor specific requests.

23. The method according to claim 13, and further comprising the step of disabling the signaling to conserve power by generating a disable signal to a signaling device used for signaling a transaction.

24. The method according to claim 13, and further comprising the step of signaling a transaction based on a correct transfer of a packet between the USB port of the host and the smart card.

25. A method for signaling different attributes of smart card transactions between a Universal Serial Bus (USB) smart card and USB port comprising the steps of:

signaling a transaction between the smart card and USB port by driving an LED operatively connected to an LED activation logic circuit and driver counter, at least one of the activation logic circuit or driver counter having microprocessor controlled registers and/or counters; and

modulating the LED based on operational attributes of the smart card and/or transactions between the smart card and USB port of a host and allowing additional context sensitive information to be conveyed by the LED.

26. The method according to claim 25, and further comprising the step of modulating the LED based on host OUT transactions.

27. The method according to claim 25, and further comprising the step of modulating the LED based on host IN transactions.

28. The method according to claim 25, and further comprising the step of modulating the LED based on USB error conditions.

29. The method according to claim 25, and further comprising the step of modulating the LED signaling based on device busy conditions.

30. The method according to claim 25, and further comprising the step of modulating the LED based on USB transfer type for a transaction.

31. The method according to claim 25, and further comprising the step of modulating the LED based on endpoints involved in a transaction.

32. The method according to claim 25, and further comprising the step of modulating the LED based on configuration.

33. The method according to claim 25, and further comprising the step of modulating the LED based on alternate settings.

34. The method according to claim 25, and further comprising the step of modulating the LED based on vendor specific requests.

35. The method according to claim 25, and further comprising the step of disabling the LED to conserve power by generating a disable signal to the LED.

36. The method according to claim 25, and further comprising the step of signaling a transaction by driving the LED on and off based on a correct transfer of a packet between the USB port and the smart card.

37. An integrated circuit comprising:

at least one card memory for storing a set of instructions related to initiating and completing smart card transactions between a Universal Serial Bus (USB) smart card and USB port of a host; and

a microprocessor connected to the at least one card memory for communicating with the host, an input/output terminal, and an activation logic circuit and driver operatively connected to said microprocessor and input/output terminal, and operative for driving a signaling device operatively connected to said input/output terminal and indicative of smart card transactions between the smart card and a USB port of a host, wherein one of at least said activation logic circuit and driver counter includes microprocessor controlled registers and/or counters, and operative for modulating the signaling device based on operational attributes of the smart card and/or transactions between the smart card and USB port of the host and allowing additional context sensitive information to be conveyed by the signaling device.

38. The integrated circuit according to claim 37, wherein the microprocessor is operative for generating a signal for activating an LED as the signaling device and modulating the LED based on operational attributes of the smart card and/or transactions between the smart card and USB port of the host.

39. The integrated circuit according to claim 37, wherein the microprocessor is operative for modulating the signaling device based on host OUT transactions.

40. The integrated circuit according to claim 37, wherein the microprocessor is operative for modulating the signaling device based on host IN transactions.

41. The integrated circuit according to claim 37, wherein the microprocessor is operative for modulating the signaling device based on USB error conditions.

42. The integrated circuit according to claim 37, wherein the microprocessor is operative for modulating the signaling device based on device busy conditions.

43. The integrated circuit according to claim 37, wherein the microprocessor is operative for modulating the signaling device based on USB transfer type for a transaction.

44. The integrated circuit according to claim 37, wherein the microprocessor is operative for modulating the signaling device based on endpoints involved in a transaction.

45. The integrated circuit according to claim 37, wherein the microprocessor is operative for modulating the signaling device based on smart card configuration.

46. The integrated circuit according to claim 37, wherein the microprocessor is operative for modulating the signaling device based on alternate settings within the smart card.

47. The integrated circuit according to claim 37, wherein the microprocessor is operative for modulating the signaling device based on vendor specific requests.

48. The integrated circuit according to claim 37, wherein the microprocessor is operative for disabling the signaling device by generating a disable signal to the signaling device.