Iii eee-ee8691-embedded sys data communication

This document discusses several data communication standards used in embedded systems, including RS-232, RS-422, RS-485, CAN, SPI, and I2C. It describes the key features and protocols of each standard. RS-232 is an older standard serial port that was commonly used to program microcontrollers but has been replaced by newer standards like JTAG and USB. RS-422 and RS-485 are balanced differential standards suitable for long-distance transmission over twisted pair cabling. CAN is a robust protocol developed for vehicle networks to interconnect electronic control units. SPI and I2C are common synchronous serial bus standards used for communication between integrated circuits.