Slave device, time synchronization method in slave device, master device, and electronic equipment system

摘要

A slave device includes: a clock unit that is configured by a counter so as to output time information; a clock generation unit that generates clocks for counting up the counter; a message receiving unit that receives messages sent from a master device; a message sending unit that sends messages to the master device; a first calculation unit that calculates a first value necessary for correcting the time on the clock unit; a first correction unit that corrects the time on the clock unit based on the first value calculated by the first calculation unit; a second calculation unit that calculates a second value necessary for correcting a frequency of the clocks generated by the clock generation unit; and a second correction unit that corrects the frequency of the clocks generated by the clock generation unit based on the second value calculated by the second calculation unit.