Stm32f1 and stm32cubeide programming examples - device driver -eeprom-at24c256 driver

EEPROM-AT24C256 drive

1、EEPROM And AT24C256 Introduce

EEPROM（ Electrically erasable programmable read only memory ） Is a user modifiable read-only memory （ROM）, It can be erased and reprogrammed repeatedly by applying a voltage higher than the normal voltage （ write in ）. And EPROM Chips are different ,EEPROM It can be modified without taking it out of the computer . however ,EEPROM The chip must be completely erased and reprogrammed , Instead of selectively erasing and reprogramming . It also has a limited life —— in other words , The number of times it can be reprogrammed is limited to tens of thousands or hundreds of thousands . Frequently reprogrammed in the course of computer use EEPROM in ,EEPROM The life of may be an important design consideration .

A special form of EEPROM It's flash memory , It works normally PC The voltage is erased and reprogrammed .

AT24C128/256 Provide 131,072/262,144 Bit serial electrically erasable programmable read only memory (EEPROM), Organization for the 16,384/32,768 A word , Each word is 8 position . The cascading function of the device allows up to 4 Devices share a common two-wire bus . The device is optimized for many industrial and commercial applications , In these applications , Low power and low voltage operation is essential . These devices use space saving 8 Lead wire JEDEC PDIP、8 Lead wire JEDEC SOIC、8 Lead wire EIAJSOIC、8 Lead wire MAP (24C128)、8 Lead wire TSSOP、8 Lead wire SOIC Array packaging and 8 Solder ball dBGA2 encapsulation . Besides , The entire collection offers 2.7V（2.7V to 5.5V） and 1.8V（1.8V to 3.6V） edition .