AT24C02 is a two-wire serial EEPROM from Atmel. 24C02 is an 8 pin IC and reads 8 bit data serially. Its memory size is 2KB. Pins 1- 3 are address pins which are connected to ground. Pin 4 is GND; Pin 5 is SDA (serial data); and pin 6 is SCL (serial clock input). Pin 7 is WP (write protect) pin and is connected to GND. Pin 8 is Vcc for providing power supply. For details on its interfacing and operation, refer interfacing 24C02 with 8051.
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AT24C02 is two-wire serially programmable EEPROM. This means that for programming, the data and control signals are provided serially along with clock signals from the other wire. The read-write operations are accomplished by sending a set of control signals including the address and/or data bits from a microcontroller.
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