a partially non - volatile dynamic random access memory uses a dram array formed by a plurality of single transistor cells or two transistor cells . the cells are electrically programmable as a non - volatile memory . this results in a single chip design featuring both , a dynamic random access memory and an electrically programmable - read - only - memory . the dram and the eprom integrated in the pndram can be easily reconfigured at any time , whether during manufacturing or in the field . the pndram has multiple applications such as combining a main memory with id , bios , or operating system information in a single chip .