Lattice LCMXO1200C-3FTN256C: A Comprehensive Technical Overview of the Low-Cost FPGA
The Lattice LCMXO1200C-3FTN256C is a prominent member of the Lattice MachXO™ family, representing a highly optimized, low-cost, non-volatile FPGA solution. Engineered for a broad range of applications, from system initialization and control to bridging and interface conversion, this device strikes a critical balance between power, performance, and price. Its non-volatile nature allows for instant-on operation and high single-event upset (SEU) immunity, making it a robust and reliable choice for industrial, consumer, and communications designs.
Architectural Core and Logic Density
At the heart of this FPGA lies a programmable logic structure consisting of Programmable Functional Units (PFUs). Each PFU contains a four-input Look-Up Table (LUT4), registers, and dedicated arithmetic logic for efficient implementation of complex functions. The device is built on a 1.2V low-power process technology, which is central to its energy-efficient profile. The "1200" in its part number denotes approximately 1200 LUTs, placing it in the mid-range of the MachXO family, suitable for control-oriented logic and smaller state machine implementations.
Key Features and On-Chip Resources
The LCMXO1200C-3FTN256C is packed with essential embedded features that minimize the need for external components, thereby reducing the total system cost and board space.
Embedded Block RAM (EBR): It includes 9.6 Kbits of embedded block RAM, configurable as single or dual-port memory. This is crucial for data buffering, FIFOs, and small lookup tables.
Distributed RAM: The LUTs can be configured as distributed RAM, providing additional flexible memory resources.
User Flash Memory (UFM): A key feature is the up to 22.8 Kbits of non-volatile User Flash Memory. This space is ideal for storing device configuration data, user constants, or even small pieces of firmware for an associated microcontroller, enhancing the system's integration level.
I/O Capabilities: Housed in a FTN256 package (Fine-pitch Thin Quad Flat Pack), the device offers 207 user I/O pins. These pins support a wide range of single-ended I/O standards (LVCMOS, LVTTL) and differential I/O standards (LVDS, RSDS, LVPECL). The "3" in its speed grade denotes a 3ns pin-to-pin delay, ensuring sufficient performance for interfacing with common peripherals and processors.
Non-Volatile Advantage and Programmability
Unlike SRAM-based FPGAs that require an external boot PROM, the MachXO family, including this device, is instant-on. Its configuration is stored directly on the chip in non-volatile flash cells. This allows the system to become operational within microseconds of power-up, a critical requirement for power sequencing and control applications. Furthermore, the device supports in-system programming (ISP) and transparent reconfiguration via the JTAG port, facilitating easy field updates and prototyping.
Target Applications
The combination of low cost, low power, and instant-on operation makes the LCMXO1200C-3FTN256C ideal for numerous market segments:
System Management: Power-on sequencing and reset control in larger computing systems.
Interface Bridging: Translating between different I/O protocols (e.g., SPI to I2C, GPIO expansion).
Industrial Control: Serving as a glue logic device in PLCs, motor drives, and human-machine interfaces (HMIs).
Consumer Electronics: Managing control functions in smart home devices and displays.
ICGOOODFIND
The Lattice LCMXO1200C-3FTN256C is a quintessential low-cost FPGA that delivers a powerful blend of non-volatile instant-on operation, a moderate logic density of 1200 LUTs, and a rich set of I/O options. Its integrated features like embedded memory and user flash make it a superior choice for designers seeking to consolidate logic, reduce board space, and lower overall system cost without sacrificing reliability or flexibility.
Keywords:
1. Low-Cost FPGA
2. Non-Volatile
3. Instant-On
4. 1200 LUTs
5. User Flash Memory (UFM)
