In the process of domestic semiconductor substitution,the choice of memory chip directly affects the performance and cost of end products.Cascadeteq's high-speed and low-power domestic PSRAM provides a reliable solution for embedded systems that need both speed and power consumption.Among them,CSS1604L,as a representative model with 16Mb capacity,is gradually becoming a new domestic alternative choice for Internet of Things,wearable devices and portable terminals by virtue of SPI/QPI simplified interface,self-refresh mechanism and wide temperature working ability.
First,Introduction of Cascadeteq High-speed and Low-power PSRAM Domestic Substitute Chip
PSRAM is made in China instead of CSS1604L,which supports 2.7V~3.6V single power supply and is perfectly compatible with 3.3V system.It works in SPI or QPI mode,and only needs four data pins to achieve a clock rate of up to 133MHz(linear 512-byte burst,VDD=3.0V 10%).Compared with parallel PSRAM or DRAM,this low pin count design greatly reduces the complexity of PCB wiring and the I/O occupation of the main control chip.Users can also configure the burst length of 16,32,64 and 512 bytes through the register,and realize 32-byte rewinding by using the rewinding switching command.The output driver is LVCMOS,which provides three levels of programmable strength of 50Ω,100Ωand 200Ω,which is convenient to match different wiring loads.
Second,the advantages of Cascadeteq high-speed and low-power PSRAM domestic replacement chip
The internal organization of PSRAM is 2M×8 bits(16Mb),and the address range[20:0]is 21 bits.The page size is 512 bytes,and the most prominent feature is the built-in self-refresh mechanism-the storage array will automatically complete data retention without sending any refresh instructions from the system master.This not only frees the overhead of main control software,but also ensures the high efficiency of reading operation,especially suitable for battery-powered scenes that need to respond at any time.
Low power consumption is one of the core advantages of PSRAM.At room temperature of 25°C,the typical standby current is only 35µA；;Even at 85°C,it is controlled at 150µA,and the maximum standby current at 105°C is 200 A..The working temperature is available in standard(-40 C~85 C)and extended(-40 C~105 C)versions,which can adapt to harsh environments such as industrial control and outdoor equipment.
Third,the characteristics of Cascadeteq high-speed low-power PSRAM domestic replacement chip
PSRAM domestic replacement chip has built-in on-chip voltage sensor.When VDD is stable above the minimum value after power-on,it needs to wait for 150µs and perform a reset operation of not less than 50ns.During this period,the clock should be kept low,the chip selection should be pulled high and the data pin should be set low.After initialization,the domestic PSRAM chip immediately enters the high-speed read-write state without complicated configuration.
RAMSUN has been deeply involved in the semiconductor industry for many years,acting as an agent for many storage brands.We provide a full range of psram chip solutions for Cascadeteq,and have a variety of domestic PSRAM chips,which can meet the specific needs of different scenarios.For more information about the selection of domestic PSRAM chips,please contact RAMSUN for professional technical support and product consulting services.
Shenzhen Ramsun Microelectronics Co.,Ltd（Ramsun International） is a vendor of the seimicondutor componets and the memory IC’s solution with clear market advantage. We still focus on the promotion for some famous semicondutor brand ,and specially take the RAM(Random Access Memory) as our core products.
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