1 STM32 has built-in SRAM and FLASH. FLASH is used to store programs, and SRAM is used to store intermediate variables during program operation. Usually, the sizes of SRAM and FLASH of different models of STM32 are different. For the STM32F103VET6 at hand, according to the data sheet,
FLASH memory is also called flash memory. Both it and EEPROM are memories whose data will not be lost after power failure, but the storage capacity of FLASH is generally larger than that of EEPROM. In terms of storage control, the most important difference is that FLASH chips can only be erased in large pieces, while EEPROM can be erased single byte.
2 SRAM is static random access memory. It is a memory with static access function, which can save the data stored inside without refreshing the circuit. The STM32F1 series can expand SRAM through the FSMC peripheral.
Note: SRAM and SDRAM are different. SDRAM is synchronous dynamic random access memory. Synchronous means that the memory needs a synchronous clock to work, and the internal command transmission and data transmission are based on it; dynamic means that the storage array needs to be constantly refreshed to ensure that data is not lost; random means that data is not stored linearly in sequence, but is freely specified to read and write data. The F1 series of STM32 does not support SDRAM.
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