The **M24C02-RMB6TP/W** is a specific variant of an I²C Serial EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by STMicroelectronics. It is widely used for storing small amounts of non-volatile data, such as configuration settings, calibration constants, or user preferences. --- ### 1. Key Technical Specifications | Parameter | Value / Description | | :--- | :--- | | **Memory Size** | 2 Kbits (256 x 8 bits) | | **Interface** | I²C (Inter-Integrated Circuit) | | **Operating Voltage ($V_{CC}$)** | 1.8V to 5.5V | | **Clock Frequency** | 400 kHz (Fast Mode) or 100 kHz (Standard Mode) | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | | **Operating Temperature** | -40°C to +85°C | | **Endurance** | 4 million write cycles | | **Data Retention** | 200 years | --- ### 2. Breakdown of the Part Number Understanding the suffix codes helps identify the specific physical and electrical characteristics: * **M24C02**: The base series (I²C, 2-Kbit density). * **-R**: Indicates a wide supply voltage range (1.8V to 5.5V). * **MB**: Refers to the **UFDFPN8** package (2x3 mm). * **6**: Temperature range grade (-40°C to 85°C). * **TP**: Tape and Reel packaging. * **/W**: Indicates a high-reliability process or specific manufacturing site (often related to automotive or industrial standards). --- ### 3. Functional Features #### Byte and Page Write The device supports both **Byte Write** (writing a single 8-bit word) and **Page Write**. It has a **16-byte page write buffer**, allowing up to 16 bytes to be written in a single instruction, which significantly reduces total programming time. #### Write Protection (WP) The chip features a hardware **Write Control (WC)** pin. - If WC is tied to $V_{CC}$, the entire memory becomes read-only. - If WC is tied to $V_{SS}$ (Ground), the memory is unprotected and can be written to. #### Device Addressing The I²C bus uses a 7-bit address format. The M24C02 uses a fixed 4-bit "Control Code" (`1010`) followed by 3 configurable hardware address pins (E2, E1, E0), allowing up to 8 of these devices to reside on the same bus. --- ### 4. Implementation Example (C-Style Pseudocode) To read a byte from the EEPROM at address `0x00`: ```c // Example using a generic I2C library #define EEPROM_ADDR 0xA0 // Device Address (1010 + E2 E1 E0 + R/W bit) uint8_t read_eeprom(uint8_t memory_address) { uint8_t data; I2C_Start(); I2C_Send_Byte(EEPROM_ADDR | 0); // Write mode to set pointer I2C_Send_Byte(memory_address); // Send memory location I2C_Restart(); I2C_Send_Byte(EEPROM_ADDR | 1); // Read mode data = I2C_Read_Byte(NACK); I2C_Stop(); return data; } ```