Pseudo Static RAM

Pseudo Static RAM is one of the variation of DRAM.The only difference between Pseudo Static RAM and DRAM is that earlier has memory refresh controller built in.Thus,since the RAM user need not worry about refreshing,the device appears to behave much like an SRAM.However,in contrast to true SRAM,a PSRAM may be busy refreshing itself when accessed,which could slow access time and add some system complexity.Nevertheless,PSRAM is a popular low cost high density memory alternative to SRAM in many embedded systems.