## Detailed Analysis of M95128-RMB6G/P The **M95128-RMB6G/P** is a high-performance, electrically erasable programmable memory (EEPROM) manufactured by STMicroelectronics. It is widely used in applications requiring non-volatile storage with high endurance and low power consumption. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 128 Kbit (16,384 bytes) | | **Interface** | SPI (Serial Peripheral Interface) | | **Clock Frequency** | Up to 20 MHz | | **Operating Voltage** | 1.8V to 5.5V | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | | **Temperature Range** | -40°C to +85°C (Industrial Grade) | | **Page Size** | 64 Bytes | --- ### 2. Functional Characteristics * **SPI Modes:** Supports SPI Bus Modes 0 (0,0) and 3 (1,1). * **Write Protection:** Includes a hardware Write Protect (`/WP`) pin and software programmable block protection to prevent accidental data overwriting. * **Data Retention:** Rated for over **100 years** of data retention. * **Endurance:** Capable of more than **4 million write cycles**, making it ideal for logging data that changes frequently. * **Status Register:** Includes a register to indicate if a write cycle is in progress or if the device is write-enabled. --- ### 3. Pinout Configuration (UFDFPN8) | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | /S | Chip Select (Active Low) | | 2 | Q | Serial Data Output | | 3 | /W | Write Protect | | 4 | VSS | Ground | | 5 | D | Serial Data Input | | 6 | C | Serial Clock | | 7 | /HOLD | Hold (Pauses communication) | | 8 | VCC | Supply Voltage | --- ### 4. Implementation Example (Pseudo-Code) To write data to this EEPROM via a microcontroller, you typically follow this sequence: ```c // 1. Enable Writing SPI_CS_LOW(); SPI_Transfer(0x06); // WREN Command SPI_CS_HIGH(); // 2. Write Data to Address 0x0010 SPI_CS_LOW(); SPI_Transfer(0x02); // WRITE Command SPI_Transfer(0x00); // Address MSB SPI_Transfer(0x10); // Address LSB SPI_Transfer(0xAB); // Data Byte SPI_CS_HIGH(); // 3. Wait for internal write cycle (tW) to complete ``` --- ### 5. Part Number Breakdown: `M95128-RMB6G/P` * **M95:** SPI Family EEPROM. * **128:** 128 Kbit density. * **-R:** Operating voltage range (1.8V to 5.5V). * **MB:** UFDFPN8 package (MLP8). * **6:** Industrial temperature range (-40 to 85°C). * **G:** ECOPACK2 (RoHS compliant). * **P:** Packing type (usually indicates Process/Tape & Reel variant).