1.What is PSRAM?

 

　　PSRAM,that is,pseudo-static random access memory,is essentially a special memory with DRAM memory cells(1T1C structure).PSRAM simulates the simple interface of SRAM by integrating the self-refresh controller inside the chip,which makes it unnecessary to deal with complex refresh timing like traditional DRAM when accessing from outside.The memory particles in PSRAM are similar to those in SDRAM,and need to be refreshed regularly to keep the data correct.For the host processor,the access mode of PSRAM is almost the same as that of SRAM-directly addressing and reading and writing data,and all refresh operations are automatically completed by the internal controller in the background.Therefore,PSRAM provides a convenient interface similar to SRAM while maintaining the characteristics of high storage density and low cost of DRAM.
 

 

　　2.Where is the psram memory chip applied?

 

　　The capacity of PSRAM provided by Yingshang is 4MB,8MB,16MB,32MB,64MB and 128MB,etc.The capacity is not as high as SDRAM,but it is much higher than ordinary SRAM,and the speed supports burst mode.PSRAM is mainly used in mobile phones,electronic dictionaries,PDA,PMP.MP3/4,GPS receivers and other consumer electronic products.Compared with SRAM(using 6T technology),PSRAM uses 1T+1C technology,so it is smaller in size.At the same time,the I/O interface of PSRAM is the same as SRAM.Therefore,it is an ideal choice for many portable products that require a certain external cache capacity.
 

 

　　3.What are the advantages of psram memory chip compared with sram?

 

　　(1)PSRAM adopts parallel interface similar to SRAM,and can be directly connected with MCU without complicated DRAM controller.This feature greatly simplifies the hardware design and shortens the development cycle,especially suitable for embedded systems with limited resources.
 

 

　　(2)Based on DRAM technology,the structure of PSRAM memory cell is simple,and the storage density can be much higher than that of SRAM(which usually adopts 6T structure)under the same chip area.Therefore,PSRAM can easily provide tens of MB or even hundreds of MB,and the unit cost is much lower than that of SRAM with the same capacity,which is helpful to reduce the material cost of the whole machine.
 

 

　　(3)The power consumption of PS RAM is similar to that of SRAM when reading and writing actively.However,because it relies on capacitors to store data,it only needs periodic micro-refresh to keep data in standby state,and the overall power consumption is lower than that of SRAM that needs continuous power supply to maintain data.This feature is especially important for battery-powered portable devices,which can help extend battery life.
 

 

　　Shenzhen Yingshang Microelectronics Co.,Ltd.is a supplier of electronic components and storage technology with comprehensive competitive advantages.We mainly focus on memory chips,semiconductor products,single-chip computers,Bluetooth chips and microswitches.We can provide a variety of capacity choices for psram memory chips with complete models,low power consumption and stable functions.If you have related product requirements,please feel free to call us.


Keywords : psram