The OKI MSM54V12222A is a high performance 3M bits, 256K X 12 bits, Field Memory especially designed for high-speed serial access applications such as HDTVs, conventional NTSC TVs, VTRs, digital movies and Multi-media systems. MSM54V12222A is a FRAM for wide or low end use as general commodity TVs and VTRs, exclusively. MSM54V12222A is not designed for the other use or high end use as medical systems, professional graphics systems require long time picture storage, data storage systems and others. More than two MSM54V12222As can be cascaded directly without any delay devices among the MSM54V12222As. ( Cascading of MSM54V12222A provides larger storage depth or a longer delay.) Each of the 12-bits planes has separate serial write and read ports that employ independent control clocks to support asynchronous read and write operations. Different clock rates are also supported that allow alternate data rates between write and read data streams. The MSM54V12222A provides high speed FIFO, First-In First-Out, operation without external refreshing: MSM54V12222A refreshes its DRAM storage cells automatically, so that it appears fully static to the users.