Nowadays, the application of electronic system requires more and more high SRAM, and the RAM in SCM or ARM is more and more insufficient. We can improve the performance of a computer by adding memory chips when it is running a comparison card. We can give the single chip microcomputer plus and memory effect of the same SRAM to improve the performance of the single chip. The following STM32F407ZGT6 microcontroller to explain the expansion of the external SRAM.
The principle of memory expansion for STM32 chip is the same as that for PC, except that it is generally in the form of memory strip. Memory strip is essentially a common standard module composed of multiple memory particles (i.e., SRAM chip), and STM32 is directly connected to SRAM chip. The following is our protagonist SRAM today, the specific model of EMI7064 domestic EMI SRAM, then take a look at the pin diagram of EMI7064.
8pin SOIC 150mil
EMI7064 64Mbit Serial SRAM supports 1.8V and 3.0V 64Mbit SPI/QPI SRAM devices. The RAM can be configured as a 1-bit input and output separation or a 4-bit I/O universal interface. The device itself performs all the necessary refresh operations. All modes have a clock frequency of 20MHz, unlimited read/write cycles and high reliability, and operating temperature ranges include -25°C to +85°C for the extended model and -40°C to +85°C for the industrial model. The 64Mbit SPI interface SRAM chip EMI7064 of domestic EMI company is the best choice of SPI SRAM solution for MCU external expansion. Therefore, it has been supported by more and more MCU manufacturers.
About EMI EMI is a market-oriented, fabless semiconductor company. Focusing on niche market dedicated/small SOC chips and total solutions, the first generation products include gigabit/gigabit USB port chips and audio/video interface chips as well as SRAM memory chips. We provide innovative, high quality, high cost performance and stable supply of chips. Our product fields cover intelligent perception, network visualization, information technology, information security, big data analysis, intelligent voice, application presentation, special communication and intelligent building. EMI agent Yingshang Microelectronics can provide sample testing and product technical support.