Semiconductor device and communication system for updating setting data of multiple channels

Abstract

A semiconductor device includes: an interface configured to receive write data transmitted via serial communication from outside; a register configured to store setting data corresponding to multiple channels; and an update controller configured to update the setting data based on the write data, wherein the write data includes first data comprising a plurality of bits corresponding to the multiple channels, respectively, each bit among the plurality of bits indicating whether or not there is a data update for a corresponding channel among the multiple channels; and second data comprising one or more update values of the setting data respectively for one or more channels, among the multiple channels, for which the first data indicates whether there are one or more data updates.