Enhanced CCID circuits and systems utilizing USB and PCI functions

• US 20070067539A1
• Filed: 09/12/2005
• Published: 03/22/2007
• Est. Priority Date: 09/12/2005
• Status: Abandoned Application

• Current Assignee: O2 Micro Incorporated
• Original Assignee: O2 Micro Incorporated
• Inventors: Morrow, Neil
• Application Number:
  US11/225,145
• Publication Number:
  US 20070067539A1
• Time in Patent Office: Days
• US Class Current: 710/305
• CPC Class Codes: G06F 13/4239 with asynchronous protocol

Abstract

The present invention provides an enhanced controller. The enhanced controller comprises a USB (Universal Serial Bus) based CCID (Chip Card Interface Device) controller which is integrated with a PCI (Peripheral Component Interconnect) or PCI Express based exchangeable media card controller. The two controllers are coupled by a shared terminal to share functions of both the USB based CCID controller and the PCI based exchangeable media card controller, thus provides benefits over the discrete controllers.

Claims

1. An integrated interface controller comprising:

a first host bus interface;

a first controller logic to control a first card interface, wherein said first controller logic utilizes a first protocol specific to said first host bus interface;

a second host bus interface;

a second controller logic to control a second card interface, wherein said second controller logic utilizes a second protocol specific to said second host bus interface; and

at least one shared terminal between said first controller logic and said second controller logic to share functions between said first controller logic and said second controller logic.

2. The integrated interface controller of claim 1, wherein said first host bus interface is a PCI (Peripheral Component Interconnect) based bus interface, and said first protocol specific to said first host bus is a PCI based protocol.

3. The integrated interface controller of claim 1, wherein said second host bus interface is a USB (Universal Serial Bus) based bus interface, and said second protocol specific to said second host bus interface is a USB based CCID (Chip Card Interface Device) protocol, thus no vendor-specific device driver is needed.

4. The integrated interface controller of claim 1, wherein said at least one shared terminal comprises a power switch interface coupling to a power switch device which supplies power to said first card interface and said second card interface.

5. The integrated interface controller of claim 1 further comprises a power switch control logic, coupling to said first controller logic and said second controller logic, configured to control said power switch device through said power switch interface, thus said first controller logic and said second controller logic can communicate power requirements to said power switch logic via internal interfaces

6. The integrated interface controller of claim 5, wherein said power switch control logic further comprises a timing synchronization logic to accommodate transformation of clock domain between said first controller logic and said second controller logic.

7. The integrated interface controller of claim 1, wherein said at least one shared terminal comprises an auxiliary power supply input to provide auxiliary power to said first controller logic and said second controller logic.

8. The integrated interface controller of claim 1, wherein said at least one shared terminal comprises a terminal used to synchronize power management states of said first controller logic and said second controller logic.

9. The integrated interface controller of claim 1, wherein said at least one shared terminal comprises a clock input to synchronize states of said first controller logic and said second controller logic.

10. The integrated interface controller of claim 9, wherein said clock input comprises a USB clock for said second controller logic used as a clock source to said first controller logic to realize clock source flexibility.

11. The integrated interface controller of claim 9, wherein said clock input further comprises a PCI clock which provides alternate timing references for said second card interface.

12. The integrated interface controller of claim 1 further comprises registers programmed through said first host bus interface used for said second controller logic control in a pre-boot environment and for configuration of said second controller logic.

13. The integrated interface controller of claim 12, wherein said registers comprise a bypass register, configured to allow BIOS to bypass said second controller logic and directly control said second card interface.

14. An integrated interface controller comprising:

a first host bus interface coupled to a first controller logic;

a second host bus interface coupled to a second controller logic; and

a shared terminal coupling said first controller logic and said second controller logic for sharing functions between said first controller logic and said second controller logic.

15. The integrated interface controller of claim 14, wherein said first host bus interface is a PCI (Peripheral Component Interconnect) based bus interface.

16. The integrated interface controller of claim 14, wherein said second host bus interface is a USB (Universal Serial Bus) based bus interface.

17. The integrated interface controller of claim 14, wherein said sharing functions includes sharing communication protocols of said first controller logic and said second controller logic.

18. The integrated interface controller of claim 14, wherein said sharing functions includes sharing power supplies of said first controller logic and said second controller logic.

19. The integrated interface controller of claim 14, wherein said sharing functions includes sharing clock inputs of said first controller logic and said second controller logic.

20. The integrated interface controller of claim 14, wherein said shared terminal is a single socket power switch interface coupling to a single power switch which provides auxiliary power supply to a single socket card interface.

21. The integrated interface controller of claim 14 utilizes a multiplexing logic to enable said single socket power switch interface to operate in a first card mode controlled by said first controller logic or an alternate second card mode controlled by said second controller logic.

23. The method of claim 19, wherein said first bus based controller is a USB (Universal Serial Bus) based CCID (Chip Card Interface Device) reader to operate a USB based card, thus no vendor-specific device driver is needed_ and said second bus based controller is a PCI (Peripheral Component Interconnect) based controller configurable for PCI based card operation integrated into said USB based CCID reader.

24. The method of claim 19 further comprising:

sharing a power switch interface with terminals used by said PCI based controller to save pin count and die area;

sharing multiplexing chip card input/output terminals with terminals used by said PCI based controllers to save pin count and die area;

sharing power management interfaces; and

sharing an auxiliary power source to provide auxiliary power to said CCID reader and said PCI based controller.

25. The method of claim 21 further comprising:

sharing a USB clock for said CCID reader as a clock source to said PCI based controller to realize clock source flexibility for said CCID reader and said PCI based controller, thus improving throughput.

26. The method of claim 21 further comprising:

utilizing said PCI based controller to provide a convenient programming interface for BIOS interface to configure and control said CCID reader directly.

22. A method to enhance a controller system comprising:

utilizing a first bus based controller;

integrating a second bus based controller into said first bus based controller; and

sharing terminals and functions between said first bus based controller and said second bus based controller.