The **LCMXO2-256UHC3FG484CTRR1** is a specific part number for a Field Programmable Gate Array (FPGA) within the **MachXO2** family, manufactured by Lattice Semiconductor. This series is known as "bridging" FPGAs because they bridge the gap between low-density CPLDs (Complex Programmable Logic Devices) and high-performance FPGAs. --- ### 1. Part Number Breakdown To understand the electronic capabilities, we must decode the nomenclature: | Code | Segment | Description | | :--- | :--- | :--- | | **LCMXO2** | Product Family | MachXO2 (Low power, instant-on, non-volatile) | | **256** | Logic Density | 256 Look-Up Tables (LUTs) | | **UHC** | Voltage/Speed | Ultra High Speed / Core Voltage (typically 1.2V) | | **3** | Speed Grade | Indicates performance level (3 is a standard grade) | | **FG484** | Package Type | Fine Pitch Ball Grid Array (fpBGA) with 484 pins | | **C** | Temperature | Commercial Grade (0°C to +85°C) | | **TRR1** | Packaging | Tape & Reel (typically for automated assembly) | --- ### 2. Core Technical Specifications The LCMXO2-256 is the smallest entry in the MachXO2 family, designed for simple glue logic, level shifting, and basic interface control. | Feature | Specification | | :--- | :--- | | **LUTs (Logic Elements)** | 256 | | **User I/O Count** | Up to 334 (depending on configuration) | | **Embedded Flash** | User Flash Memory (UFM) for non-volatile storage | | **On-chip RAM** | Distributed RAM support | | **Voltage Supply** | 1.14V to 1.26V (Core) | | **Hardened IP** | I2C, SPI, and Timer/Counter blocks | --- ### 3. Key Electronic Characteristics #### A. Instant-On Technology Unlike high-end FPGAs that require an external flash memory to load their configuration at power-up (taking milliseconds to seconds), the MachXO2 stores its configuration in **on-chip Flash**. This allows the device to become active in microseconds, making it ideal for system reset controllers. #### B. Low Power Design The "UHC" designation signifies a focus on low static power consumption. It is optimized for battery-powered or heat-sensitive applications where a massive FPGA would be overkill. #### C. Hardened Interface Blocks While it only has 256 LUTs, it includes "Hardened" IP blocks. This means functions like **I2C, SPI, and RAM** are physically built into the silicon rather than using up your limited logic gates. This effectively increases the "usable" logic of the device. --- ### 4. Common Applications * **System Control:** Managing power-up sequences for larger processors. * **Interface Bridging:** Converting signals between different I/O standards (e.g., LVCMOS to LVDS). * **I/O Expansion:** Adding more GPIO pins to a microcontroller via a serial bus. * **Glueless Logic:** Replacing multiple 74-series discrete logic chips to save PCB space.