Marvell International Limited

Calvin Fang

William Lo

Yi Cheng

Leechung Yiu

Willaim Lo

A physical layer (PHY) device including a first encoder, a second encoder, and a selector. The first encoder is configured to receive a first data stream at a first data rate, encode the first data stream using a first type of encoding, and output a first encoded data via a plurality of outputs. The second encoder is configured to receive a second data stream at a second data rate, encode the second data stream using a second type of encoding, and output a second encoded data via an output. The selector includes a first set of inputs and a second set of inputs. The first set of inputs is configured to receive the plurality of outputs of the first encoder, and each input of the second set of inputs is configured to receive the output of the second encoder.

100BASE-FX serializer/deserializer using 1000BASE-X serializer/deserializer

A physical layer (PHY) device includes a first encoder that receives a first data stream at a first data rate, that encodes the first data stream using a first type of encoding, and that outputs first encoded data. A second encoder receives a second data stream at a second data rate different than the first data rate, encodes the second data stream using a second type of encoding different than the first type of encoding, and outputs second encoded data. An output selector outputs the first encoded data to a serializer of the PHY when the PHY transmits at the first data rate, and outputs the second encoded data to the serializer when the PHY transmits at the second data rate.

100Base-FX serializer/deserializer using 1000Base-X serializer/deserializer

A physical layer device comprises a transmitter of a first network device that transmits an autonegotiation signal to a second network device. A receiver of the first network device receives a received signal from the second network device. An autonegotiation controller autonegotiates link parameters for a link between the first network device and the second network device, monitors autonegotiation pulses in the autonegotiation signal relative to autonegotiation pulses in the received signal received during a window, and selectively blinds autonegotiation based on the monitoring.

Method and apparatus for autonegotiation between network devices

A first network device comprises first and second transformers that communicate with a second network device. A switch selectively connects power to the first and second transformers. A physical layer device communicates with the first and second transformers and includes a signal generator, a detector, and a controller that communicates with the switch, the signal generator and the detector. The signal generator generates a test signal comprising n sub-pulses, where n is an integer greater than 2. When the detector detects j pulses that are greater than a predetermined threshold, 1&#x2266;j&#x3c;n, the controller supplies power to the second network device, where j is an integer.

Method and apparatus for detecting and supplying power by a first network device to a second network device

A transmit path in a physical layer device comprises a first transmit encoding device that has N outputs, that receives a first data stream at a first data rate and that performs a first type of encoding on the first data stream. A second transmit encoding device has an output, receives a second data stream at a second data rate and performs a second type of encoding on the second data stream. The first data rate is N times the second data rate. An output selector has a first set of N inputs that communicates with the N outputs of the first transmit encoding device, a second set of N inputs that communicate with the output of the second transmit encoding device and N outputs. The output selector selectively connects one of the first and second sets of N inputs to the N outputs.

100base-FX serializer/deserializer using 1000base-X serializer/deserializer

A physical layer device includes a deserializer that deserializes one of first and second data streams. The first data stream includes successive N-bit sequences having one of all ones and all zeros. A converter oversamples the first data stream, identifies edge transitions in the first data stream to locate N adjacent bits that substantially align with the N-bit sequences, and samples at least one bit of the N adjacent bits.

100Base-FX serializer/deserializer using 10000Base-X serializer/deserializer

A first network device supplies power to a second network device in communication therewith. The first network device comprises a physical layer device which includes a pulse generator to generate a test signal comprising n sub-pulses to be transmitted to the second network device, wherein in n being greater than 2. A detector is responsive to the second network device, and a controller is in communication with the detector and the pulse generator. When the detector detects j pulses which are greater than a predetermined threshold, 1&#x2266;j&#x3c;n, the controller, responsive to the detector, enables power to be transmitted to the second network device.

A first network device is provided in communications with a second network device comprising a physical layer device. The physical layer device comprises a transmitter to transmit an autonegotiation signal to the second network device, a receiver to receive a received signal from the second network device, and a controller comprising an autonegotiation controller to set a highest common data rate between the first network device and the second network device. The autonegotiation controller compares the autonegotiation signal and the received signal and selectively prevents the autonegotiation when the autonegotiation signal is the same as the received signal.

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Milpitas, CA, United States of America

Calvin Fang