The **M2UDS-1G-R** is a specific electronic component typically identified as a **Micro SD Memory Card** (Industrial/Commercial grade). While manufacturer-specific prefixes can vary, this part number structure is common for high-reliability flash storage solutions used in embedded systems. --- ## Technical Specifications Overview Below is a breakdown of the core electronic and physical attributes of the M2UDS-1G-R: | Attribute | Specification | Details | | :--- | :--- | :--- | | **Storage Capacity** | 1 GB | High-density SLC or MLC Flash memory. | | **Interface** | UHS-I / SD Interface | Supports SPI, 1-bit, and 4-bit SD modes. | | **Form Factor** | MicroSD (microSDHC) | Standard 11mm x 15mm x 1mm dimensions. | | **Voltage Range** | 2.7V to 3.6V | Standard operating voltage for SD cards. | | **Endurance** | Industrial Grade | Designed for high write cycles and data retention. | | **RoHS Status** | Compliant (-R) | Indicates lead-free and environmentally safe materials. | --- ## Internal Electronic Components The "parts" inside the plastic casing of an M2UDS-1G-R consist of three primary electronic subsystems: ### 1. NAND Flash Die This is the non-volatile memory storage area. In a 1GB module, this is usually a single high-reliability die. * **Data Cells:** Stores bits by trapping electrons in a floating gate. * **Error Correction (ECC):** Integrated logic to detect and fix bit flips during the read/write process. ### 2. Memory Controller (ASIC) The "brain" of the card. It manages how data is moved between the host device and the NAND flash. * **Wear Leveling:** Ensures write operations are spread across the memory cells evenly to prevent premature failure. * **Bad Block Management:** Identifies and maps out defective sectors. * **Protocol Translation:** Converts SD commands from the host into low-level NAND flash operations. ### 3. Passive Components * **Capacitors:** Surface-mount ceramic capacitors (MLCCs) are used internally to stabilize the voltage and filter noise during high-speed data bursts. * **Resistors:** Used for pull-up/pull-down signal integrity on the internal data lines. --- ## Pinout Configuration The M2UDS-1G-R utilizes the standard 8-pin microSD interface: | Pin # | Name | Description | | :--- | :--- | :--- | | 1 | DAT2 | Data Line [Bit 2] | | 2 | CD/DAT3 | Card Detect / Data Line [Bit 3] | | 3 | CMD | Command / Response | | 4 | VDD | Supply Voltage (2.7V - 3.6V) | | 5 | CLK | Clock | | 6 | VSS | Ground | | 7 | DAT0 | Data Line [Bit 0] | | 8 | DAT1 | Data Line [Bit 1] | --- ## Applications Due to the **1GB** capacity and **-R** (RoHS) designation, this part is frequently used in: * **PLCs (Programmable Logic Controllers):** For storing boot code and log files. * **Embedded Medical Devices:** Where small-scale, reliable data logging is required. * **Telecommunications Gear:** Used for firmware storage and system recovery images.