The **LCMXO2-640HC-5TG100C** is a member of the **MachXO2** family of Field Programmable Gate Arrays (FPGAs) manufactured by Lattice Semiconductor. It is designed to bridge the gap between low-density CPLDs (Complex Programmable Logic Devices) and high-performance FPGAs. --- ## 1. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Logic Cells** | 640 Look-Up Tables (LUTs) | | **User I/O Count** | 78 I/Os | | **Embedded Memory (EBR)** | 18 Kbits | | **User Flash Memory** | 64 Kbits | | **Operating Voltage** | 2.5V to 3.3V (Core) | | **Speed Grade** | -5 (High Speed) | | **Package Type** | TQFP-100 (Thin Quad Flat Pack) | | **Temperature Range** | 0°C to 85°C (Commercial Grade) | --- ## 2. Key Electronic Features ### A. Non-Volatile Configuration Unlike high-end FPGAs that require an external flash chip to load their configuration upon power-up, the MachXO2 series features **on-chip Flash memory**. This allows for: * **Instant-on capability:** The device starts functioning almost immediately after power is applied. * **Reduced PCB space:** No external boot PROM required. * **Security:** Bitstream data remains inside the chip, making it harder to intercept. ### B. Hardened IP Cores The silicon includes dedicated hardware blocks for common communication protocols, which saves logic cells for other tasks: * **I2C & SPI:** Hardened controllers for peripheral interfacing. * **Timer/Counters:** Built-in 16-bit counters. * **PLL (Phase Locked Loop):** One internal PLL for frequency synthesis and clock management. ### C. Low Power Consumption The "HC" in the part number signifies a high-performance/low-power balance. It utilizes a 65nm process technology that minimizes static power leakage, making it suitable for battery-operated handheld devices. --- ## 3. Part Number Breakdown Understanding the nomenclature helps in identifying its specific capabilities: | Code | Meaning | | :--- | :--- | | **LCMXO2** | Lattice MachXO2 Family | | **640** | Logic Density (640 LUTs) | | **HC** | High Performance / 2.5V-3.3V Core | | **5** | Speed Grade (Higher is faster) | | **TG100** | 100-pin TQFP Package | | **C** | Commercial Temperature Grade | --- ## 4. Common Applications Due to its small logic density and high I/O count, this specific part is frequently used for: * **Interface Bridging:** Converting signals between different I/O standards (e.g., LVCMOS to LVDS). * **I/O Expansion:** Adding more pins to a microcontroller that has run out of GPIOs. * **System Control:** Power sequencing, reset generation, and glue logic for motherboards. * **Display Interfacing:** Driving small LCD character or graphic displays.