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Extremely high frequency systems and methods of operating the same to establish USB data transport protocols

  • US 9,940,295 B2
  • Filed: 08/14/2015
  • Issued: 04/10/2018
  • Est. Priority Date: 08/14/2015
  • Status: Active Grant
First Claim
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1. A contactless communications transmitter unit (CCTU) for use in establishing a contactless communications link with a first contactless communications receiver unit (CCRU) that is associated with a second USB device and for use in communicating with a second CCRU via at least one wired path, the contactless communication transmitter unit comprising:

  • a plurality of pins, wherein at least a first pin is used to communicate with the second CCRU via a wired path and at least a second pin is used to communicate with a first Universal Serial Bus (USB) device;

    a transducer for transmitting extremely high frequency (EHF) contactless signals to the first CCRU;

    circuitry operative to;

    execute a CCTU state machine that tracks a state of the CCTU during the establishment of the contactless communications link, wherein the state machine transitions through a plurality of states in response to signals received by the first pin, wherein one of the plurality of states comprises a capabilities state for determining a data transfer protocol;

    execute a USB state machine during the capabilities state to enable the first USB device to establish a USB connection with the second USB device via the contactless communication link, wherein the USB state machine transitions through a plurality of USB states in response to signals received by the at least a first pin and the at least a second pin; and

    selectively transmit EHF signals, using the transducer, in response to a state transition in at least one of the CCTU state machine and the USB state machine.

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