Intel Corporation

Jia Jun Lee

Amit Kumar Srivastava

Chia How Low

Huimin Chen

Asad Azam

Chee Hong Aw

Tim McKee

Kevin Beow Ee Tan

Teong Guan T G Yew

An Embedded Universal Serial Bus 2.0 (USB2) device includes a physical layer having a detection mechanism to detect an Single-ended 1 (SE1) valid state and differentiate the SE1 valid state from other USB2 states.

State detection mechanism

Methods and apparatuses relating to USB high-speed chirp detection are described. In one embodiment, a bus host transceiver circuit includes a first data path to connect to a bus device, a second data path to connect to the bus device, a squelch detection circuit with a first and a second input, and a switching circuit to couple the first data path to the first input of the squelch detection circuit separate from a first resistor and couple the second data path to the second input of the squelch detection circuit separate from a second resistor when in a first mode, and switch to a second mode to couple the first data path through the first resistor to the first input of the squelch detection circuit and couple the second data path through the second resistor to the second input of the squelch detection circuit when in a host reset period.

Apparatuses, systems, and methods for USB high-speed chirp detection

In some embodiments, provided are circuits and approaches for responding to wake requests over a data bus such as with a USB interface. An interconnect PHY may be placed into an aggressive power reduction mode and in response to a detected wake request on the bus, respond in a sufficient time by keeping at least a portion of a transmitter data path in the PHY powered on during the reduced power mode and responding to the wake request while the PHY re-boots in the background.

Interconnect wake response circuit and method

Techniques for embedded high speed serial interface methods are described herein. The method includes issuing a single-ended one (SE) signal on each of a pair of embedded high speed serial interface data lines, the SEindicating a register access protocol (RAP) message follows the SEsignal. The method also includes accessing a register of an embedded high speed serial interface component based on the RAP message.

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Seberang Jaya, Malaysia

Jia Jun Lee