DATA TRANSMISSION SYSTEM AND DATA TRANSMISSION DEVICE

摘要

A data transmission device (1a) generates and transmits a lock signal for clock synchronization with data transmission devices (1b to n). Here, the data transmission device (1a) can generate a pattern 1 lock signal for notifying start of communication by 8-value mapped data and a pattern 2 lock signal for notifying start of communication by 4-value mapped data. One of the two types of lock signals is transmitted to each of the data transmission devices. Each of the data transmission devices judges which of the lock signals has been received and can notify the data communication method before training.