Marvell Asia Pte., Ltd.

Madhusudhan Harigovindan Thekkeettil

David H Shen

Josef Mueller

Two pointers are initialized. The first pointer is incremented every M cycles of a monitored clock and the second pointer is incremented every N cycles of a reference clock, where M and N are determined from a frequency relationship between the clocks. If the positions of the pointers are determined to differ by more than a drift threshold, an error is detected and corrective action may be taken.

Clock monitoring using pointer techniques

An apparatus for controlling a sensor over a network includes a transceiver and a processor. The transceiver is configured to communicate over a network. The processor is configured to receive or generate control data for controlling a sensor connected to the network, to generate a packet including (i) the control data and (ii) a trigger timestamp indicative of a future time at which the control data is to be provided to the sensor, and to transmit the packet using the transceiver over the network.

Synchronized control of sensors in an Ethernet network

An apparatus for controlling a sensor over a network includes a transceiver and a processor. The transceiver is configured to communicate over the network. The processor is configured to receive or generate control data for controlling a sensor, the sensor being connected to the network by a peer device. The processor is further configured to wake-up a link with the peer device in accordance with a schedule, and, during a time period in the schedule in which the link with the peer device is awake, to send to the peer device a packet comprising the control data.

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Cupertino, CA, United States of America

Madhusudhan Harigovindan Thekkeettil