### Overview of M95160-R The **M95160-R** is a 16-Kbit (2048 x 8 bits) serial Electrically Erasable Programmable Read-Only Memory (EEPROM) manufactured by STMicroelectronics. It is designed to be managed via a Serial Peripheral Interface (**SPI**) bus. --- ### Key Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 16 Kbit (2,048 Bytes) | | **Interface** | SPI (Mode 0 and Mode 3) | | **Operating Voltage (Vcc)** | 1.8V to 5.5V | | **Clock Frequency** | Up to 20 MHz (at 4.5V - 5.5V) | | **Page Size** | 32 Bytes | | **Write Cycles** | More than 4 Million cycles | | **Data Retention** | More than 200 Years | | **Operating Temperature** | -40°C to +85°C | --- ### Pin Configuration and Functions The device typically comes in small footprints like **SO8** or **TSSOP8**. | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **S#** | Chip Select (Active Low) | | 2 | **Q** | Serial Data Output | | 3 | **W#** | Write Protect (Hardware protection) | | 4 | **Vss** | Ground | | 5 | **D** | Serial Data Input | | 6 | **C** | Serial Clock | | 7 | **HOLD#** | Pause serial communication without deselecting | | 8 | **Vcc** | Supply Voltage | --- ### Core Functional Features #### 1. SPI Protocol Support The device supports high-speed data transfer using the SPI bus. It responds to standard instructions such as: * **WREN:** Write Enable * **WRDI:** Write Disable * **RDSR:** Read Status Register * **WRSR:** Write Status Register * **READ:** Read from Memory Array * **WRITE:** Write to Memory Array #### 2. Write Protection The M95160-R includes both software and hardware write protection: * **Software:** Using the Status Register bits (BP0, BP1) to protect specific blocks of memory. * **Hardware:** Using the **W#** pin combined with the Status Register Write Disable (SRWD) bit. #### 3. Data Integrity * **Byte/Page Write:** You can write a single byte or a full page (up to 32 bytes) in one cycle. * **Self-timed Write Cycle:** The internal write cycle is triggered automatically and takes approximately **5 ms**. --- ### Application Usage Example To communicate with the M95160-R using a microcontroller (like an Arduino or STM32), you would typically use a code structure similar to this: ```cpp // Pseudocode for SPI Write Enable void writeEnable() { digitalWrite(CHIP_SELECT, LOW); // Select the chip SPI.transfer(0x06); // Send WREN opcode (0x06) digitalWrite(CHIP_SELECT, HIGH); // Deselect to complete instruction } ``` ---