The **M95320-RMB6P** is a specific variant of the M95320 family, which consists of Electrically Erasable Programmable Read-Only Memory (EEPROM) chips. This particular part is manufactured by **STMicroelectronics**. --- ### 1. Key Technical Specifications The technical attributes of the M95320-RMB6P define its performance and electrical boundaries: | Feature | Specification | | :--- | :--- | | **Memory Size** | 32 Kbit (4,096 bytes x 8 bits) | | **Interface** | SPI (Serial Peripheral Interface) | | **Max Clock Frequency** | 10 MHz (at VCC > 2.5V) / 5 MHz (at VCC < 2.5V) | | **Operating Voltage (VCC)** | 1.8V to 5.5V | | **Package Type** | UFDFPN8 (MLP8) - Ultra Thin Fine Pitch Dual Flat No-Lead | | **Temperature Range** | -40°C to +85°C (Industrial Grade) | | **Write Cycles** | 4,000,000 (4 Million) cycles | | **Data Retention** | 200 Years | --- ### 2. Part Number Breakdown (Decoding the Suffixes) Understanding the suffix is critical for identifying the physical and electrical characteristics: * **M95320**: Base Part Number (32 Kbit SPI EEPROM). * **-R**: Operating Voltage range (1.8V to 5.5V). * **MB**: Package Code for **UFDFPN8** (2x3 mm footprint). * **6**: Temperature range 6 (-40°C to 85°C). * **P**: ECOPACK2 (RoHS compliant, Lead-free, Halogen-free). --- ### 3. Functional Pinout Descriptions The device typically uses an 8-pin layout. Below is the standard mapping for the UFDFPN8 package: | Pin | Symbol | Description | | :--- | :--- | :--- | | 1 | **S#** | Chip Select (Active Low) | | 2 | **Q** | Serial Data Output (MISO) | | 3 | **W#** | Write Control (Hardware protection) | | 4 | **VSS** | Ground | | 5 | **D** | Serial Data Input (MOSI) | | 6 | **C** | Serial Clock | | 7 | **HOLD#** | Pause Serial Communication | | 8 | **VCC** | Supply Voltage | --- ### 4. Specialized Features * **Block Protection:** It includes software-writable registers that allow the user to "freeze" or write-protect a quarter, half, or the entire memory array. * **Byte and Page Write:** Supports writing a single byte or a full page (up to 32 bytes) in a single write cycle. * **Self-Timed Write Cycle:** The chip handles the internal timing for erasing and writing data, typically completing in 5ms. * **High Endurance:** Designed for applications that require frequent data logging or parameter storage due to its 4-million-cycle rating. --- ### 5. Implementation Example (Pseudo-Code) To read data from this chip using an MCU, you would typically follow this SPI sequence: ```cpp // Basic SPI Read Sequence for M95320 digitalWrite(CHIP_SELECT, LOW); // Activate chip SPI.transfer(0x03); // Send READ Instruction (0x03) SPI.transfer(address >> 8); // Send MSB of 16-bit address SPI.transfer(address & 0xFF); // Send LSB of 16-bit address uint8_t data = SPI.transfer(0x00); // Clock in the data byte digitalWrite(CHIP_SELECT, HIGH); // Deactivate chip ```