Dynamic ODT (Rtt_WR) enables the DRAM to change termination values during a WRITE without having to perform a MODE REGISTER SET command. When Rtt_Wr and Rtt_Nom are both enabled, the DRAM will change termination values from Rtt_Nom to Rtt_Wr at the beginning of the WRITE burst. Once the burst is complete, the termination will be changed back to the Rtt_Nom value. Rtt_Wr can be used independently of Rtt_Nom, but termination will be on WRITEs only.