The **LCMXO2-7000HC-4FTG256C** is a non-volatile Field Programmable Gate Array (FPGA) belonging to the **MachXO2** family developed by Lattice Semiconductor. It is widely used in system control, interface expansion, and glue logic applications. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Logic Cells** | 6,864 Look-Up Tables (LUTs) | | **Embedded Block RAM (EBR)** | 240 Kbits | | **User Flash Memory (UFM)** | 256 Kbits | | **Operating Voltage (Vcc)** | 2.5V to 3.3V | | **Speed Grade** | -4 (Standard performance) | | **Package Type** | FTBGA-256 (17mm x 17mm) | | **I/O Count** | 206 User I/Os | | **Temperature Range** | 0°C to 85°C (Commercial) | --- ### 2. Core Architectural Components #### A. Logic Resources The device features **6,864 LUTs**, which allow for complex digital logic implementation. These are organized into Programmable Functional Units (PFUs) that handle logic, arithmetic, and register functions. #### B. Non-Volatile Technology Unlike standard SRAM-based FPGAs, the MachXO2 uses **on-chip Flash memory**. * **Instant-On:** The device configures itself in milliseconds upon power-up. * **Single-Chip:** No external boot PROM is required, saving PCB space and reducing costs. #### C. Hardened IP Blocks To save logic cells for user applications, Lattice "hardens" common functions into the silicon: * **I2C & SPI Controllers:** Dedicated hardware for serial communication. * **Timer/Counters:** Built-in 16-bit timers. * **PLLs (Phase Locked Loops):** Two PLLs for clock frequency synthesis and jitter reduction. --- ### 3. Pinout and Physical Characteristics The **FTG256** package is a Fine-Pitch Thin Ball Grid Array with 256 balls. * **Ball Pitch:** 1.0 mm. * **I/O Banks:** The I/Os are divided into multiple banks, allowing different banks to operate at different voltage standards (e.g., Bank 1 at 3.3V LVCMOS and Bank 2 at 1.8V). --- ### 4. Part Number Decoder Understanding the nomenclature helps in identifying variants: * **LCMXO2**: MachXO2 Product Family. * **7000**: Approximately 7000 Logic Cells. * **HC**: High Performance / High Voltage (2.5V/3.3V). * **4**: Speed Grade (Higher numbers are faster in some families, but in MachXO2, -4 is standard). * **FTG256**: 256-ball FTBGA package (Lead-Free/RoHS). * **C**: Commercial Temperature Grade. --- ### 5. Common Applications * **System Control:** Power-up sequencing, reset distribution, and glue logic between CPUs and peripherals. * **Bus Bridging:** Converting signals between different interfaces (e.g., I2C to Parallel). * **I/O Expansion:** Adding more GPIOs to a microcontroller that has run out of pins. * **Display Interfacing:** Small-scale video signal processing or driving character/segment LCDs.