COMMUNICATION CIRCUIT, DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION CIRCUIT CONTROL METHOD

Abstract

Connection and disconnection between a termination resistor of a communication circuit and a transmission path are switched without causing a communication error. Communication circuit includes communication part termination resistor switch detector, and controller Communication part is provided in device connected to transmission path, and communicates with another communication part provided in another device connected to transmission path through transmission path. Termination resistor is connected to transmission path. Switch switches between connection and disconnection between termination resistor and transmission path. Detector detects total resistance value of all resistors connected to transmission path in a state where termination resistor and transmission path are connected. Controller controls switching between connection and disconnection between termination resistor and transmission path with switch based on a result of the detection of detector.

CPC Classifications