Semiconductor device and memory system

A device capable of communicating with a host apparatus, comprising:

• a symbol generation unit which includes a random number generation circuit, the symbol generation unit configured to select one of a first symbol and a second symbol in a random order with use of the random number generation circuit and output the selected one of the symbols;
• a coding unit which performs coding a signal of the outputted symbol to transform a bit number;
• and
• a transmission unit which transmits the symbol coded by the coding unit to the host apparatus,
• wherein the first symbol and the second symbol indicate an idle state,
• wherein the coded symbol is transmitted to the host apparatus by the transmission unit,
• wherein each of the first and second symbols includes a pair of symbols including a symbol as a plus running disparity and another symbol as a minus running disparity,
• wherein if a symbol which was most recently selected by the random number generation circuit had a plus running disparity, a symbol selected by the random number generation circuit becomes a minus running disparity, and
• wherein if a symbol which was most recently selected by the random number generation circuit had a minus running disparity, a symbol selected by the random number generation circuit becomes a plus running disparity.