The **LCMXO2-256HC-5UMG64C** is a member of the MachXO2 family from Lattice Semiconductor. It is an ultra-low-power, instant-on, non-volatile FPGA (Field Programmable Gate Array) designed for system control and interface bridging applications. --- ### 1. Key Technical Specifications | Parameter | Value | Description | | :--- | :--- | :--- | | **Logic Cells** | 256 | Look-Up Tables (LUTs) for logic implementation | | **I/O Count** | 44 | Programmable Input/Output pins | | **Package** | 64-VFBGA | Very Fine Pitch Ball Grid Array (5x5 mm) | | **Voltage Supply** | 2.375V ~ 3.465V | Standard Core Voltage | | **RAM Bits** | 0 (Distributed) | Uses LUTs for small memory requirements | | **User Flash** | 64 Kbits | On-chip non-volatile storage | | **Speed Grade** | -5 | High-speed grade performance | --- ### 2. Core Functional Parts #### A. Programmable Logic Blocks (PLB) The architecture is based on **Look-Up Tables (LUT4)**. These blocks are the building blocks for digital logic circuits. In this specific model, there are 256 LUTs, making it suitable for glue logic, simple state machines, and I/O expansion. #### B. Non-Volatile Configuration Memory Unlike many FPGAs that require an external Flash memory chip to load their configuration upon power-up, the MachXO2 has **on-chip Flash**. - **Instant-on:** The device is operational in milliseconds. - **Security:** Logic patterns are stored internally, making it harder to intercept the bitstream. #### C. Hardened IP Blocks To save logic cells, Lattice integrates "Hardened" (fixed-circuit) versions of common functions: - **I2C/SPI Interfaces:** Built-in controllers for peripheral communication. - **Timer/Counter:** Dedicated hardware for clock management. - **User Flash Memory (UFM):** Can be used to store serial numbers, calibration data, or small boot codes. #### D. I/O Bank Architecture The 44 I/Os are organized into banks. They support various signaling standards such as LVCMOS (3.3V, 2.5V, 1.8V, 1.2V) and differential signaling (LVDS). --- ### 3. Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **LCMXO2** | MachXO2 Product Family | | **256** | 256 Logic Cells | | **HC** | High Performance / High Voltage (2.5V/3.3V) | | **5** | Speed Grade (-5 is faster than -4) | | **UMG64** | 64-ball ucBGA package (0.5mm pitch) | | **C** | Commercial Temperature Grade (0°C to 85°C) | --- ### 4. Common Applications Due to its small footprint and low power consumption, it is frequently used in: * **Power Sequencing:** Managing the startup order of complex SoC/CPU rails. * **I/O Expansion:** Adding more GPIOs to a microcontroller. * **Interface Bridging:** Converting signals (e.g., I2C to SPI or parallel to serial). * **Mobile/Handheld Devices:** Where PCB space is at a premium.