Slave device, master device, communication system, and communication method

摘要

In a communication system, a master device gives a data control to one of a plurality of slave devices, and stops controlling data transmission and reception in the master device. A dual-role device executes the data transmission and reception with the other slave devices according to the data control given by the master device. The master device transmits an abort signal to the dual-role device while data is being transmitted and received by the dual-role device according to the data control. The dual-role device receives the abort signal from the master device, and transmits an interrupt signal to the master device when no data is being transmitted or received. The master device enables data transmission and reception according to the data control after receiving the interrupt signal from the dual-role device. The dual-role device stops data transmission and reception according to the data control after receiving the interrupt signal.

主权项

1. A slave device comprising:
a data input terminal configured to receive a command from a master device through a differential transmission line; a data output terminal configured to transmit a response and an interrupt signal to the master device through the differential transmission line; and an interrupt controller configured to control the interrupt signal, wherein the interrupt controller is further configured to output the interrupt signal repeatedly and transmit the interrupt signal to the master device, and stop the repeated output of the interrupt signal when having received from the master device a command packet for clearing an interrupt, and when the interrupt controller has received the interrupt signal from another slave device through the data input terminal, the interrupt controller transmits the received interrupt signal to the master device through the data output terminal.