## Technical Overview of M95320-RDL6TG The **M95320-RDL6TG** is a low-voltage, high-speed 32-Kbit Serial SPI (Serial Peripheral Interface) EEPROM manufactured by STMicroelectronics. It is designed for non-volatile data storage in applications where power consumption and space are critical. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 32 Kbit (4,096 bytes) | | **Interface** | SPI (Serial Peripheral Interface) | | **Max Clock Frequency** | 20 MHz (at 4.5V - 5.5V) / 5 MHz (at 1.8V) | | **Operating Voltage** | 1.8V to 5.5V | | **Package Type** | MLP / DFN8 (2x3 mm) | | **Write Endurance** | 4 million cycles | | **Data Retention** | 200 years | | **Operating Temp** | -40°C to +85°C | --- ### 2. Functional Electronic Parts & Pinout The device typically comes in an 8-pin configuration. Below is the functional breakdown of the internal electronic structure: #### Pin Configuration 1. **S# (Chip Select):** Activates the device when pulled low. 2. **Q (Serial Data Output):** Used to read data out of the memory. 3. **W# (Write Protect):** Hardware protection to prevent unauthorized write operations. 4. **Vss:** Ground connection. 5. **D (Serial Data Input):** Used to send instructions and data into the memory. 6. **C (Serial Clock):** Synchronizes the data transfer. 7. **HOLD#:** Pauses serial communication without deselecting the device. 8. **Vcc:** Supply voltage. --- ### 3. Core Electronic Features #### A. Memory Architecture The memory is organized as **4096 x 8 bits**. It supports page-write operations of up to 32 bytes at a time, allowing for efficient bulk data updates. #### B. SPI Modes The part is compatible with SPI bus modes 0 and 3. Data is latched on the rising edge of the clock (C) and shifted out on the falling edge. #### C. Write Protection Mechanisms * **Status Register:** Software protection using the Block Protect (BP0, BP1) bits to lock specific portions of the memory. * **W# Pin:** Hardware protection that locks the Status Register when combined with the Status Register Write Disable (SRWD) bit. #### D. Low Power Consumption This specific variant ("R" in the part number) is optimized for low-voltage operation (1.8V), making it ideal for battery-powered devices like wearables, medical sensors, and IoT modules. --- ### 4. Code Example: Basic SPI Initialization (Pseudo-code) ```c // Example of initializing an SPI read for M95320 #define READ_INST 0x03 void Read_EEPROM(uint16_t address) { CS_Low(); // Select the chip SPI_Transfer(READ_INST); // Send Read Instruction SPI_Transfer(address >> 8); // Send High Byte of Address SPI_Transfer(address & 0xFF); // Send Low Byte of Address uint8_t data = SPI_Transfer(0x00); // Receive Data CS_High(); // Deselect the chip } ``` ---