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Serial EEPROM devices like the Microchip 24-series EEPROM allow you to add more memory to any device that can speak I²C. Today we're going to learn how to read and write serial EEPROM devices using Arduino.
29 Νοε 2023 · The eeprom_i2c_read() function reads a single byte of data from a specified address in the EEPROM. The function takes two arguments: address is the I2C address of the EEPROM chip, and from_addr is the memory address in the EEPROM to read from.
A good summary of using various I2C EEProms is Microchip’s “AN536 Basic Serial EEPROM Op-eration” 1. Addressing the EEProm Memory Space BL233Cs K command hides this complexity especially for large reads and writes. I2C EEProms have an internal address pointer. This must be written (an I2C write cycle) before data can be read or written.
The 24C64 provides 65,536 bits (8kB) of serial electrically erasable and programmable read-only memory (EEPROM) organized as 8192 words of 8 bits each. The device’s cascadable feature allows up to 8 devices to share a common 2-wire (I2C) bus.
27 Νοε 2021 · Now we will see how to write or read data on an I2C EEPROM like 24C256C. This serial EEPROM is organized as 32,768 words of 8 bits each. The device’s cascading feature allows up to eight devices to share a common 2-wire bus.
19 Ιουν 2019 · I2C memory is often found in 8-pin packages with the following pins: VCC / VSS – Power-providing pins. Ax – Device selection pins. SCL – Serial Clock. SDA – Serial Data. WP – Write Protect.
This example application demonstrates how to use the I2C peripheral to write and read from the I2C serial EEPROM memory.
