### Technical Overview of M95160-RDL5T The **M95160-RDL5T** is a specific variant of the 16-Kbit serial SPI (Serial Peripheral Interface) EEPROM manufactured by **STMicroelectronics**. It is designed for high-reliability applications requiring non-volatile memory storage. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 16 Kbit (2,048 bytes x 8 bits) | | **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) | | **Package Type** | MLP / DFN (UFDFPN5 or UFDFPN8) | | **Operating Temperature** | -40°C to +85°C | | **Write Cycles** | More than 4 million cycles | | **Data Retention** | Over 200 years | --- ### 2. Functional Electronic Components The internal architecture of the chip consists of several critical electronic blocks: * **Memory Array:** Organized as 2,048 words of 8 bits each. * **Status Register:** Used to set write protection and check the "Ready/Busy" status of the chip. * **Write Protection Logic:** Includes a hardware Write Protect ($\overline{W}$) pin and software block protection bits to prevent accidental data corruption. * **Instruction Decoder:** Interprets standard SPI opcodes (READ, WRITE, WREN, WRDI, RDSR, WRSR). --- ### 3. Pin Configuration & Description | Pin Name | Function | Description | | :--- | :--- | :--- | | **S (Chip Select)** | Input | Activates the device when held low. | | **D (Serial Data In)** | Input | Receives instructions, addresses, and data. | | **Q (Serial Data Out)** | Output | Transfers data out of the device. | | **C (Serial Clock)** | Input | Provides timing for data transfer. | | **$\overline{W}$ (Write Protect)** | Input | Provides hardware protection against write instructions. | | **$\overline{HOLD}$** | Input | Pauses communication without deselecting the device. | | **Vcc / Vss** | Power | Supply voltage and Ground. | --- ### 4. Part Number Breakdown: M95160-RDL5T * **M95:** STMicroelectronics SPI family. * **160:** 16 Kbit density. * **-R:** Operating voltage range (1.8V to 5.5V). * **DL:** Specific package/process geometry (often indicates UFDFPN5 or similar ultra-thin packages). * **5:** Temperature range (-40°C to +85°C). * **T:** Tape and Reel packaging. --- ### 5. Implementation Example (SPI Mode) To communicate with the M95160, the master device (Microcontroller) must pull the Chip Select line low and send an 8-bit instruction. ```python # Conceptual SPI Write sequence for M95160 # 1. Pull CS Low # 2. Send WREN (0x06) opcode to enable writing # 3. Pull CS High # 4. Pull CS Low # 5. Send WRITE (0x02) opcode # 6. Send 16-bit Address (0x0000 - 0x07FF) # 7. Send Data Byte # 8. Pull CS High (Initiates internal write cycle) ```