公开(公告)号：US20180341310A1

公开(公告)日：2018-11-29

申请号：US15937152

申请日：2018-03-27

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Bradley Allan LAMBERT ,  Michael A. KOST ,  Ganesh SARIPALLI ,  Gregory C. YANCEY

IPC: G06F1/26 ,  H02J7/00 ,  G06F13/42

CPC classification number: G06F1/266 ,  G06F1/263 ,  G06F13/4282 ,  G06F2213/0042 ,  H02J7/0052 ,  H02J2007/0062

Abstract: A method for port policy management for active charge through of a peripheral device that has a first communication port and a second communication port may include detecting whether a valid power connection exists at the peripheral device, in response to detecting the valid power connection, determining a relationship between the first communication port and the second communication port, based on the relationship, determining, by the peripheral device, a power relationship among the peripheral device, the first communication port, and the second communication port, selectively configuring the first communication port, the second communication port, and the peripheral device to match the power relationship, and enabling active charging through of the peripheral device if active charging through is supported by the power relationship.

公开(公告)号：US20190261076A1

公开(公告)日：2019-08-22

申请号：US16279148

申请日：2019-02-19

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Bradley Allan LAMBERT ,  Michael Allan KOST ,  Robert David RAND ,  Ian Johnson SMITH

IPC: H04R1/08 ,  G10L25/78 ,  H04R3/00 ,  G06F13/42

Abstract: There is provided a USB audio accessory device, comprising: an audio transducer, configured to generate an audio transducer signal; interface circuitry, configured to receive analogue and digital representations of the audio transducer signal; and a USB-C connector for connecting to a USB host device, coupled to the interface circuitry. The interface circuitry is operable, in a first mode of operation, to output simultaneously the analogue representation of the audio transducer signal over a first pin of the USB-C connector, and the digital representation of the audio transducer signal over second and third pins of the USB-C connector.

公开(公告)号：US20180349296A1

公开(公告)日：2018-12-06

申请号：US15988593

申请日：2018-05-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert David RAND ,  Bradley Allan LAMBERT

IPC: G06F13/10 ,  G06F13/42 ,  G06F3/16

Abstract: Interface circuitry is provided for a host device, the interface circuitry for controlling data connections between the host device and a peripheral device. The interface circuitry comprises: a discovery module, operable to detect mating of a connector of the peripheral device with a connector of the host device, and to store an indication of the current mating status of the connector of the host device; and a data connection management module, configured to: responsive to detection of mating between the connector of the peripheral device and the connector of the host device by the discovery module, establish a digital data connection between the connector of the peripheral device and the connector of the host device; responsive to detection of a deactivation event and based on the stored indication of the mating, deactivate the digital data connection; and responsive to detection of an activation event and based on the stored indication of the mating, re-establish the digital data connection between the connector of the peripheral device and the connector of the host device.

公开(公告)号：US20180307293A1

公开(公告)日：2018-10-25

申请号：US15926643

申请日：2018-03-20

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Bradley Allan LAMBERT ,  Bruce E. DUEWER ,  David HISKY ,  Marc J. KOBAYASHI ,  Michael A. KOST

IPC: G06F1/32 ,  G06F1/10 ,  G06F1/12 ,  G06F13/38

CPC classification number: G06F1/3215 ,  G06F1/10 ,  G06F1/12 ,  G06F13/385

Abstract: A device may include an input for receiving information communicated from a host to the device and a controller configured to recover a device reference clock on the device, the device reference clock proportional to a host reference clock of the host, when clock signaling from the host to the device is unavailable. The controller may recover the device reference clock by measuring a ratio between the host reference clock and the device reference clock of the device by monitoring, with the device, host start-of-frame markers communicated from the host to the device via the input, creating a recovered reference clock based on the measured ratio, and creating local start-of-frame markers that are phase locked with the host start-of-frame markers based on the recovered reference clock.A method for generating a not-yet (NYET) signal in a recovered reference system for recovering a device reference clock on a device, wherein the NYET signal indicates that the device is not yet ready for transition into a low power mode, in order to improve a quality of a recovered reference clock representative of a host reference clock of a host communicatively coupled to the device, may be provided. The method may include detecting receipt of start-of-frame markers from the host to the device, responsive to detecting receipt of the markers, determining whether a condition for NYET generation is being met, responsive to the condition for NYET generation being met, generating the NYET signal to cause the host to continue generating the markers, and responsive to the condition for NYET generation not being met, causing the device to generate an acknowledge signal for transition of the device into the low power mode.

公开(公告)号：US20180039585A1

公开(公告)日：2018-02-08

申请号：US15662777

申请日：2017-07-28

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Bradley Allan LAMBERT ,  Michael A. KOST

IPC: G06F13/10 ,  G06F13/42

Abstract: In accordance with embodiments of the present disclosure, an adapter for different types of devices that are defined by a full set of capabilities for a communication protocol may include one or more ports, wherein each of the one or more ports is configured to receive one of the different types of devices, and a device controller communicatively coupled to the one or more ports. The device controller may be configured to, when one of the different types of devices is received by the one or more ports obtain information related to a detection of the one of the different types of devices and, based on the information related to the detection, expose a subset of capabilities from the full set of capabilities to a bus of the communication protocol, wherein the subset of capabilities is defined by the one of the different types of devices for the communication protocol.