it uses electrical signals instead of ultra violet rays. This special capacitor takes on an electrical charge in a quantum physics effect called tunneling. The microcontroller on the Arduino board (ATMEGA328 in case of Arduino UNO, shown in figure below) has EEPROM (Electrically Erasable Programmable Read-Only Memory). When you push the button random values are saved to the EEPROM. PIC16F18326 write & read to EEPROM not working, using MCC generated code Hi: I am using a PIC16F18326 with the MPLAB X IDE 5.20 and MCC Version: 3.85.1. The I2C protocol has the EEPROM send an acknowledge bit when it is addressed. The EEPROM memory devices have evolved from the old EPROM memories. Internal EEPROM data erased or corrupted out in the field in an RF application: The presence of a charge determines the value (1 or 0) of the memory cell. After the unit cools down or a chip erase is executed, the issue disappears and the flash is working properly. Electrically Erasable Programmable Read Only Memory (EEPROM) EEPROM is the short form for Electrically Erasable Programmable Read Only Memory. A typical EPROM has a window on the top side of the IC to allow the ultraviolet rays to reach the memory cells in order to erase the memory. If you imagine all of the bytes in a 512 Kbit EEPROM standing in a line from 0 to 64000 — because there are 8 bits to a byte and therefore you can fit 64000 bytes on a 512 Kbit EEPROM — then a memory address is the place in line where you would find a particular byte. Which was the previous technology in this area. This is a small space that can store byte variables. int value = EEPROM.read(addr); As with the write function, we will have to indicate the address to read (addr), and the data will be saved in the variable value. For this we will use the EEPROM.read function, which will allow us to read bytes from EEPROM memory. I`m trying to do simple test writes & reads to/from the EEPROM memory. Write to it. It is similar to EPROM and thus developed to overcome the drawbacks of EPROMs. The procedure to test read and write should be: Pick a memory location. Memory Addresses. Data is created in them by electrical pulses and a grid. Wait for the write to complete. Flash memory is a type of EEPROM chip, which stands for Electronically Erasable Programmable Read Only Memory. It has a grid of columns and rows with a cell that has two transistors at each intersection (see image below). The Idea here is to store a set of simple type variables sequentially in the EEPROM at a specific EEPROM address. Example routines for I2C communications exist on the Microchip website. A floating gate is a gate with a special capacitor for its only electrical connection. 3. Electrically Erasable Programmable Read Only Memory (EEPROM pronounced as “double E prom) is like a ROM but data can be erased from it electrically without removing it from the computer. 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