The **M3EH55XPD-R** is a specific part number typically associated with **embedded memory solutions**, specifically **eMMC (embedded MultiMediaCard)** modules. This part is commonly manufactured by Micron Technology. Below is a breakdown of the electronic specifications and functional components of this part. --- ### 1. Key Technical Specifications | Parameter | Description | | :--- | :--- | | **Component Type** | eMMC (embedded MultiMediaCard) | | **Architecture** | NAND Flash + Integrated Controller | | **Interface** | JEDEC eMMC 5.0 / 5.1 Standard | | **Storage Capacity** | Typically 4GB to 16GB (Part-specific density) | | **Voltage Supply** | Vcc (NAND): 2.7V - 3.6V / Vccq (I/O): 1.7V - 1.95V | | **Package Type** | 153-ball FBGA (Fine-pitch Ball Grid Array) | | **Bus Width** | 1-bit, 4-bit, or 8-bit | --- ### 2. Functional Electronic Blocks The M3EH55XPD-R is not just a storage chip; it is a system-in-package (SiP) consisting of two main electronic parts: #### A. NAND Flash Memory This is the physical storage medium. It uses non-volatile cells (typically MLC or TLC) to retain data even when power is disconnected. In this specific series, the NAND is optimized for high-cycle endurance. #### B. Integrated Controller The controller manages the NAND flash, handling complex tasks that the host processor (CPU) doesn't have to perform. Key functions include: * **Error Correction Code (ECC):** Detects and fixes data corruption. * **Wear Leveling:** Ensures memory cells are used evenly to extend the chip's lifespan. * **Bad Block Management:** Identifies and bypasses manufacturing or age-related defects in the flash. * **Address Mapping:** Converts logical addresses from the host into physical locations on the NAND. --- ### 3. Application Use Cases Because of its small footprint (FBGA153) and integrated controller, the M3EH55XPD-R is found in: * **Embedded Systems:** Industrial PCs and IoT gateways. * **Consumer Electronics:** Smart TVs, set-top boxes, and tablets. * **Automotive:** Infotainment systems and dashboard displays (depending on temperature rating). --- ### 4. Hardware Pinout Overview As a 153-ball BGA device, the physical layout includes: * **DAT[0-7]:** Data lines for 8-bit parallel communication. * **CMD:** Command line for host-to-device instructions. * **CLK:** Clock signal for synchronization. * **RST_n:** Hardware reset pin.