23.6 A 0.6V 4.266Gb/s/pin LPDDR4X interface with auto-DQS cleaning and write-VWM training for memory controller. - Soo-Min Lee; Jihun Oh; Jinho Choi; Seokkyun Ko; Daero Kim; Kyounghoi Koo; JongRyun Choi; Yoonjee Nam; Sangsoo Park; Hyungkweon Lee; Eunsu Kim; Sukhyun Jung; et al. (ISSCC, 2017)