An Ethernet transceiver is disclosed. The Ethernet transceiver includes transceiver circuitry including transmit circuitry, receive circuitry, and adaptive filters. The transceiver circuitry is configurable to operate in one of two low-power modes. A first low-power mode includes update operations for the adaptive filters. A second low-power mode includes turning off at least one of the transmit circuitry and the receive circuitry, and omitting update operations for the adaptive filters.

An in-vehicle network system includes a first control unit, a second control unit, and a network connecting the first control unit to the second control unit. The first control unit performs a process of transmitting data, which is target of high-speed processing, having a first data length obtained by dividing transmission data by the first data length or obtained by adding predetermined data to the transmission data as high-speed processing. The second control unit performs a process of receiving reception data at a first processing speed that is a low speed when the second control unit determines that a data length of the reception data is not the first data length, and performs a process of receiving the reception data at a second processing speed higher than the first processing speed when the second control unit determines that the data length of the reception data is the first data length.

A system and method is provided for qualitative analysis of baseband building automation networks. The system may include a processor configured to carry out a plurality of tests on a serial communication network that includes at least one field device that carries out building automation communications on the network. A first test may include: transmitting a series of queries for devices on the network, in which the queries are transmitted at incrementally lower transmission signal levels until message loss is detected; and determining a first lower signal level at which transmissions of queries occur without message loss on the network. In addition, the processor may be configured to determine and output on a display device at least one classification of the relative quality of the network with respect to at least one predetermined scale of relative network quality based at least in part on the first lower signal level.

A method for managing a number of Ethernet links includes identifying a number of Ethernet links to utilize a number of channels of a cable based on a number of capabilities and a number of policies of a number of media access controllers (MACs) and a number of physical layer entities (PHYs), determining a number of Ethernet link types to be configured for the cable based on the capabilities and policies of the MACs and PHYs, negotiating a number of parameters to allow multi-channel ports of a number of nodes connected to the cable to establish communications through the Ethernet links based on the determined Ethernet link types and the utilized channels, and managing the cable configuration describing the MACs to be supported by the channels within the cable based on the policies.

To provide greater efficiency in connecting and establishing communicational equipment, the communicational system type can be automatically detected and the communicational equipment can configure itself in accordance with the automatically detected communicational type. Additionally, to accommodate dynamic reconfiguration, or changes to the communicational type after an initial configuration, the communicational type can be automatically monitored and the communicationally equipment automatically reconfigured if changes are detected. Different sets of comparator circuitry can be utilized to compare the voltages observed at known inputs to known thresholds of different communicational types to automatically detect the communicational type being utilized by existing equipment to which the newly-connected equipment is communicationally coupled. For efficiency, already existing circuitry for converting electrical voltages into digital data can be leveraged to monitor and automatically detect the communicational type being utilized.

A microphone array configurable to connect via an Ethernet connection with an audio processor includes a plurality of MEMS microphones (7101-7121), a plurality of sigma-delta modulators (7201-7221), a processor and storage (90), and an Ethernet physical interface (80) operating at a network data transmission rate. Each sigma-delta modulator converts the analog output of a corresponding microphone into a bit stream at an audio sampling rate. The processor and storage performs a data-interleaving operation (92) to combine the bit streams from the sigma-delta modulators into a microphone audio frame serial bit stream (34), and loads the microphone audio frame serial bit stream into a FIFO memory (94) at a FIFO serial data load rate. The processor and storage computes an Ethernet FCS checksum on the microphone audio frame serial bit stream, concatenates, an FCS delay gap, the Ethernet FCS checksum, a timing gap, a frame prefix, a UDP/IP prefix, a payload, and the microphone audio frame serial bit stream to form an Ethernet frame packet serial bit stream, unloads this Ethernet packet serial bit stream from the FIFO memory at the network data transmission rate and transmits the Ethernet frame packet serial bit stream from the Ethernet physical interface.

Embodiments of a device and method are disclosed. In an embodiment, a method of communications involves operating an Ethernet media access control (MAC) unit according to a rate specified in an IEEE 802.3 standard and adapting to transmit data to or from the Ethernet MAC unit at an effective data communications rate on a physical media, where the effective data communications rate is different from the rate specified by the IEEE 802.3 standard.

Embodiments of a method and a device are disclosed. In an embodiment, a method for operating a Controller Area Network (CAN) transceiver involves detecting phase information related to a CAN data frame that is transmitted by the CAN transceiver and in response to the phase information, switching between different transmitter configurations of the CAN transceiver within a bit interval for use in transmitting subsequent bits of the CAN data frame.

A network device may comprise one or more circuits including a clock signal generator, an ADC, and a processor. The ADC may digitize a received signal across a range of frequencies that encompasses a first band of frequencies used for a first network and a second band of frequencies used for a second network. A sampling frequency of the ADC may be determined by a frequency of a clock signal output by the clock signal generator. The processor may determine whether the first network is active and whether the second network is active. The processor may configure the clock generator such that, when both of the first network and the second network are active, the clock signal is set to a first frequency, and when the first network is active and the second network is inactive, the clock signal is set to a second frequency.

A transmission device for the intrinsically safe transmission of data in an Ethernet network via a core pair of an Ethernet cable is disclosed. The transmission device includes a first sub-path connected to a first wire of the core pair of an Ethernet signal pair and a second sub-path connected to a second wire of the core pair of the Ethernet signal pair. Each sub-path comprises at least one current-limiting resistor and a common-mode rejection unit connected in series to the current-limiting resistor.