The **LCMXO2-640HC-5TG100I** belongs to the **MachXO2** family developed by Lattice Semiconductor. It is an ultra-low-power, instant-on, non-volatile PLD (Programmable Logic Device) designed to bridge the gap between low-density CPLDs and high-capacity FPGAs. --- ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify specific performance characteristics: | Code Segment | Description | Specific Detail | |:---|:---|:---| | **LCMXO2** | Family Series | MachXO2 (Low Power, Non-volatile) | | **640** | LUT Count | Approximately 640 Look-Up Tables | | **HC** | Voltage/Power | High Performance / 2.5V or 3.3V VCC | | **5** | Speed Grade | Standard Speed (Higher numbers are faster) | | **TG100** | Package Type | 100-pin TQFP (Thin Quad Flat Pack) | | **I** | Temp Grade | Industrial Grade (-40°C to +105°C) | --- ### 2. Technical Specifications The device is optimized for control-path applications, system bus expansion, and interface bridging. * **Logic Capacity:** 640 Look-Up Tables (LUT4). * **Embedded Flash:** On-chip "Instant-on" configuration (no external boot PROM required). * **I/O Count:** 78 User I/Os. * **Memory:** 18 Kbits of Embedded Block RAM (EBR) and 640 bits of Distributed RAM. * **Hardened IP:** Includes built-in I2C, SPI, and Timer/Counter blocks to save logic cells. * **Power Consumption:** Static power as low as 18 µW. --- ### 3. Key Electronic Features #### A. Non-Volatile Technology Unlike standard FPGAs that lose their configuration when power is removed, the MachXO2 uses on-chip Flash memory. It boots in microseconds, making it ideal for power-sequencing tasks where the chip must be active before the main processor. #### B. User Flash Memory (UFM) The chip provides dedicated Flash space for user data storage (such as calibration constants or serial numbers), which can be accessed via the logic fabric. #### C. Flexible I/O (sysIO) The 100-pin TQFP package supports various signaling standards including: * LVCMOS (3.3V, 2.5V, 1.8V, 1.5V, 1.2V) * LVTTL * PCI * LVDS (Differential signaling) --- ### 4. Typical Applications Due to its small logic density and high I/O flexibility, it is commonly used for: 1. **System Control:** Power-up sequencing, reset distribution, and glue logic. 2. **Interface Bridging:** Converting signals between different I/O standards (e.g., I2C to Parallel). 3. **Sensor Hubs:** Aggregating data from multiple low-speed sensors in industrial equipment. 4. **Display Drivers:** Basic timing controllers for small LCD screens. --- ### 5. Programming Interface Example Programming is typically done via **JTAG** or **SPI**. Below is a simplified representation of the JTAG pin requirements: ```yaml # JTAG Pin Assignment for LCMXO2-640 Pin 1: TCK (Test Clock) Pin 2: TMS (Test Mode Select) Pin 3: TDI (Test Data In) Pin 4: TDO (Test Data Out) ```