PSRAM adopts the process and technology of DRAM, but implements RAM devices similar to SRAM. With the development of science and technology, in order to take into account the advantages of both SRAM and DRAM, that is, large capacity and simple interface driver, PSRAM was developed. The PSRAM interface is as simple as SRAM, and the drive is simple; while the storage form is the same as DRAM, the capacity is much larger than SRAM, between SRAM and DRAM, and now the maximum is 64MB.
PSRAM technology and technology realize the characteristics of large capacity and low cost; in the IO protocol, an interface protocol similar to SRAM is adopted, and the refresh circuit is changed to internal self-refresh, and there is no need to use a controller to control the memory unit for periodic refresh like DRAM. So the interface is much simpler than DRAM.
PSRAM is more suitable for applications that require a certain cache capacity, fast speed, low power consumption, and high cost performance requirements, such as data-intensive, algorithm processing (FFT, etc.), burst access and other application scenarios. Its applications cover mobile phones, PDAs, children's toys, MP3/4 players, smart watches, smart voice interactive devices and other consumer electronics products.
Insun serial PSRAM storage device has SPI, QPI interface, supports single-chip SPI, QPI interface, the RAM can be configured as a 1-bit input and output independent interface or a 4-bit I/O general interface. All necessary refresh operations are taken care of by the device itself. It has the advantages of small package, large capacity and low cost. It is a low-cost, low-power, high-capacity ram resource expansion storage solution.