Semiconductor device using multi-level signaling and coding method thereof

Abstract

Disclosed is a semiconductor device transmitting a multi-level signal including: an encoder encoding user data into encoded data; and a transmission driver converting the encoded data into a multi-level signal. The encoder includes: a bit adder generating a codeword by adding at least one shaping parity bit to the user data; an encoding operator generating candidate encoded data by performing an encoding operation on the codeword; a metric operator calculating metric values by using a metric operation equation for the candidate encoded data; and a metric searcher searching for the metric values to select the encoded data from the candidate encoded data and provide the selected encoded data to the transmission driver.