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U

UART

Universal Asynchronous Receiver/Transmitter: UART stands for Universal Asynchronous Receiver/Transmitter. It's not a communication protocol like SPI and I2C, but a physical circuit in a microcontroller, or a stand-alone IC. A UART's main purpose is to transmit and receive serial data.

UdpNm

UDP Network Management: The module UdpNm implements synchronous transition to sleep mode for Ethernet ECUs.

UDS

Unified Diagnostic Service: Unified Diagnostic Service (UDS) according to the ISO 14229 standard is a protocol used by diagnostic systems to communicate with ECUs in vehicles. The protocol is used to diagnose errors and reprogram ECUs. For example, it is possible to read and delete the fault memory of an ECU or to flash a new firmware on the ECU.