The **LCMXO2-640HC-4TG100C** is a member of the **MachXO2** family developed by Lattice Semiconductor. It is a bridge between a CPLD (Complex Programmable Logic Device) and an FPGA, often referred to as an "Instant-on, non-volatile FPGA." --- ## 1. Technical Specifications | Parameter | Details | | :--- | :--- | | **Logic Cells (LUTs)** | 640 Look-Up Tables | | **User I/O Count** | 78 I/Os | | **Package Type** | TQFP-100 (Thin Quad Flat Pack, 100-pin) | | **Voltage Supply** | 2.375V to 3.465V (Core) | | **RAM Bits** | 18 Kbits (Embedded Block RAM) | | **Operating Temperature** | 0°C to 85°C (Commercial Grade) | | **Flash Memory** | On-chip Flash for configuration (No external PROM needed) | --- ## 2. Key Architectural Features ### A. Non-Volatile Configuration Unlike standard FPGAs that require an external SPI Flash to load their configuration upon power-up, the MachXO2 stores its configuration in internal Flash. This allows for: * **Instant-on:** The device is operational in microseconds. * **Security:** The bitstream is stored inside the chip, making it harder to intercept. ### B. Hardened IP Cores The "HC" (High Performance) variant includes dedicated hardware blocks that save logic cells for other tasks: * **I2C / SPI Interfaces:** Built-in hard cores for serial communication. * **Timer/Counters:** Dedicated 16-bit timers. * **Oscillator:** Internal RC oscillator (no external crystal required for basic logic). ### C. Low Power Consumption The MachXO2 family is designed for power-sensitive applications. It features a "Sleep Mode" and a "Standby Mode" to minimize current draw in portable devices. --- ## 3. Part Number Breakdown The part number provides specific details about the chip's capabilities: | Code Segment | Meaning | | :--- | :--- | | **LCMXO2** | MachXO2 Product Family | | **640** | Logic Capacity (640 LUTs) | | **HC** | High Performance / High Voltage (3.3V Core) | | **4** | Speed Grade (Lower is slower, 6 is faster) | | **TG100** | Package Type (TQFP 100-pin) | | **C** | Temperature Grade (Commercial: 0°C to 85°C) | --- ## 4. Typical Applications * **System Control:** Managing power-up sequences for larger processors. * **Interface Bridging:** Converting signals between different protocols (e.g., I2C to Parallel). * **I/O Expansion:** Adding more GPIO pins to a microcontroller. * **Display Interfacing:** Driving small character or graphic LCDs.