The **LCMXO2-7000HC-4FG400C** is a high-performance, non-volatile Field Programmable Gate Array (FPGA) from the **MachXO2** family developed by Lattice Semiconductor. It is designed to bridge the gap between low-density CPLDs and high-capacity FPGAs, focusing on system control and interface applications. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the specific technical constraints of the chip: | Code Segment | Description | Details | | :--- | :--- | :--- | | **LCMXO2** | Family Series | MachXO2 (Bridging and Control FPGAs) | | **7000** | Logic Density | Approximately 6864 Look-Up Tables (LUTs) | | **HC** | Power/Voltage | High Performance (1.2V, 2.5V, or 3.3V core) | | **4** | Speed Grade | -4 Speed Grade (Standard performance) | | **FG400** | Package Type | 400-ball Fine-pitch Ball Grid Array (fpBGA) | | **C** | Temperature | Commercial Grade (0°C to +85°C) | --- ### 2. Core Technical Specifications The MachXO2 series is unique because it integrates Flash memory for configuration, meaning the device is "instant-on." #### Logic and Memory - **LUTs:** 6,864 Look-Up Tables. - **Embedded Block RAM (EBR):** 240 Kbits. - **User Flash Memory (UFM):** 256 Kbits (Used for non-volatile data storage). - **Distributed RAM:** 54 Kbits. #### I/O and Connectivity - **User I/O:** Up to 335 pins. - **I/O Standards:** Supports LVCMOS (3.3V, 2.5V, 1.8V, 1.5V, 1.2V), LVTTL, PCI, LVDS, and differential signaling. - **Hardened IP Blocks:** Includes dedicated $I^2C$, SPI, and Timer/Counter blocks to save logic cells. --- ### 3. Key Electronic Features #### A. Instant-On Architecture Unlike traditional SRAM-based FPGAs (like Xilinx Spartan or Intel Cyclone) which require an external PROM to load code upon power-up, this chip stores its configuration in internal **Flash**. It becomes active in microseconds. #### B. Power Management The "HC" variant is optimized for low power consumption. It includes: * **Standby Mode:** Very low static current. * **On-chip Voltage Regulator:** Simplifies board design by allowing a single power rail in some configurations. #### C. WISHBONE Bus Interface The chip supports the WISHBONE internal bus, making it easy to connect the hardened $I^2C$/SPI blocks to user-defined logic or soft-core processors (like the LatticeMico8). --- ### 4. Typical Applications Due to its high I/O count and low power, it is commonly used for: 1. **System Control:** Power sequencing and reset generation for larger SoCs. 2. **Interface Bridging:** Converting signals between different formats (e.g., I2C to Parallel, LVDS to CMOS). 3. **I/O Expansion:** Adding more GPIOs to microcontrollers. 4. **Display Driving:** Interfacing with small LCD or OLED panels. --- ### 5. Programming and Development To develop for this chip, you typically use: * **Software:** Lattice Diamond® Design Software. * **Language:** VHDL or Verilog. * **Hardware:** A JTAG-based programmer (Lattice HW-USBN-2B).