Data Sheet

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RB-Dfr-88

DFRobot EEPROM Data Storage Module For Arduino

Introduction

If you want more storage for your Arduino project, this module is designed for you. This EEPROM data storage

module supplies an extra 32k byte for your project. Simply wired them via I2C. Supplied with Interface cable which

can be fawlessly integrated with interface shield.

Specification

• Supply Voltage:+5V

• Current:<10mA

• Interface:I2C/TWI

• EEPROM: AT24C256

• Weight:5 gram

Setting

• Default Address:0x50

• Adjustable from 0x50-0x57 via the swither

Summary of content (5 pages)

PAGE 1
RB-Dfr-88 DFRobot EEPROM Data Storage Module For Arduino Introduction If you want more storage for your Arduino project, this module is designed for you. This EEPROM data storage module supplies an extra 32k byte for your project. Simply wired them via I2C. Supplied with Interface cable which can be fawlessly integrated with interface shield.
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Address Truth Table
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Sample Code /* * Use the I2C bus with EEPROM 24LC64 * Sketch: eeprom.pde * * Author: hkhijhe * Date: 01/10/2010 * * */ #include //I2C library void i2c_eeprom_write_byte( int deviceaddress, unsigned int eeaddress, byte data ) { int rdata = data; Wire.beginTransmission(deviceaddress); Wire.send((int)(eeaddress >> 8)); // MSB Wire.send((int)(eeaddress & 0xFF)); // LSB Wire.send(rdata); Wire.
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Wire.endTransmission(); } byte i2c_eeprom_read_byte( int deviceaddress, unsigned int eeaddress ) { byte rdata = 0xFF; Wire.beginTransmission(deviceaddress); Wire.send((int)(eeaddress >> 8)); // MSB Wire.send((int)(eeaddress & 0xFF)); // LSB Wire.endTransmission(); Wire.requestFrom(deviceaddress,1); if (Wire.available()) rdata = Wire.
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i2c_eeprom_write_page(0x50, 0, (byte *)somedata, sizeof(somedata)); // write to EEPROM delay(10); //add a small delay Serial.println("Memory written"); } void loop() { int addr=0; //first address byte b = i2c_eeprom_read_byte(0x50, 0); // access the first address from the memory while (b!=0) { Serial.print((char)b); //print content to serial port addr++; //increase address b = i2c_eeprom_read_byte(0x50, addr); //access an address from the memory } Serial.