COMMUNICATION DEVICE, COMMUNICATION SYSTEM, AND SYNCHRONOUS CONTROL METHOD

摘要

A communication device includes a transmission port and a reception port communicating with other network units, a system bus I/F unit communicating with a synchronous target, n (n is an integer of 2 or more) delay counters counting a predetermined period of time, a delay-counter control unit that, upon receiving a synchronous packet input with a predetermined cycle from the reception port, causes the delay counters to count a cycle that is n times as long as the predetermined cycle and controls the delay counters such that counts of the delay counters are cleared at different timings, and a synchronous-pulse output unit outputting a synchronous pulse to the synchronous target through the system bus I/F unit when there is the counter whose count value after being cleared becomes equal to a synchronous-pulse output value.

主权项

1. A communication device comprising:
a first communication unit that communicates with another communication device; a second communication unit that communicates with a synchronous target; n (n is an integer of 2 or more) counters that count a predetermined period of time; a counter control unit that, upon receiving a synchronous packet input with a predetermined cycle from the first communication unit, causes the counters to count a cycle that is n times as long as the predetermined cycle and controls the counters such that counts of the counters are cleared at different timings; and a synchronous-pulse output unit that outputs a synchronous pulse to the synchronous target through the second communication unit when there is a counter whose count value after being cleared becomes equal to a synchronous-pulse output value.