## Overview of BR24C02-RDS6TP The **BR24C02-RDS6TP** is a 2K-bit serial EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by **ROHM Semiconductor**. It is widely used for storing small amounts of non-volatile data, such as configuration settings, device IDs, or calibration data in consumer and industrial electronics. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 2 Kbit (256 words × 8 bits) | | **Interface** | I²C (Inter-Integrated Circuit) | | **Clock Frequency** | 400 kHz (Fast Mode) | | **Supply Voltage (Vcc)** | 1.7V to 5.5V | | **Write Cycles** | 1,000,000 cycles | | **Data Retention** | 40 Years | | **Package Type** | MSOP8 (Mini Small Outline Package) | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Pin Configuration The device typically comes in an 8-pin package. Below is the functional breakdown of the pins: | Pin Number | Name | Function | | :--- | :--- | :--- | | 1, 2, 3 | A0, A1, A2 | **Slave Address Settings:** Used to set the unique I2C address for the chip. | | 4 | GND | **Ground:** 0V reference. | | 5 | SDA | **Serial Data:** Bi-directional pin for data transfer. | | 6 | SCL | **Serial Clock:** Input for the clock signal. | | 7 | WP | **Write Protect:** When High, write operations are inhibited. | | 8 | VCC | **Power Supply:** Positive voltage input. | --- ### 3. Core Features * **Low Voltage Operation:** Supports a wide range from 1.7V to 5.5V, making it ideal for battery-powered devices. * **Page Write Function:** It allows writing up to 8 bytes in a single write cycle, improving efficiency compared to byte-by-byte writing. * **Hardware Write Protection:** The **WP pin** provides physical security to prevent accidental data overwrites. * **Self-Timed Programming:** The chip handles the internal timing for the write cycle (typically 5ms). * **Noise Filtering:** Includes Schmitt triggers and noise filters on SCL and SDA inputs to ensure stable communication in noisy environments. --- ### 4. Typical Application Circuit When integrating the BR24C02-RDS6TP into a design, pull-up resistors are required on the I²C bus lines. ```cpp // Example: Basic pseudo-code for writing a byte to BR24C02 Wire.beginTransmission(0x50); // Standard 7-bit I2C address Wire.write(0x00); // Target Memory Address Wire.write(0x42); // Data byte to store Wire.endTransmission(); // Internal Write Cycle starts here ``` --- ### 5. Common Use Cases 1. **Consumer Electronics:** Storing user preferences in TVs or smart appliances. 2. **Computing:** Storing BIOS settings or SPD (Serial Presence Detect) data in RAM modules. 3. **Industrial:** Storing calibration constants for sensors. 4. **Networking:** Holding MAC addresses and configuration data for routers.