会社ブログについて Lattice LIFCL-40-8BG400C LIFCL‑40 CrossLink-NX™ FPGA Implementing MIPI Bridging And Edge AI

Shenzhen Mingjiada Electronics Co., Ltd. supplies/recycles Lattice LIFCL-40-8BG400C LIFCL-40 CrossLink-NX™ FPGA for MIPI bridging and edge AI.

I. LIFCL-40-8BG400C Core Overview: Engineered for Embedded Vision and Edge Intelligence

The Lattice LIFCL-40-8BG400C belongs to the Lattice CrossLink-NX™ series of FPGAs. Built upon the 28nm FD-SOI Nexus process platform, it is an embedded vision-specific chip that balances low power consumption, compact size, high reliability, and high performance. Designed for MIPI interface bridging, multi-sensor fusion, and lightweight edge AI inference scenarios, It perfectly addresses the intelligent upgrade requirements across automotive, industrial vision, security surveillance, and consumer electronics sectors. Packaged in a 400-pin BGA, this chip offers ample logic resources and comprehensive hard interfaces. It enables MIPI protocol conversion and edge AI computing integration without additional peripherals, eliminating the dual-chip architecture (‘bridge chip + AI accelerator’) found in traditional solutions. This significantly reduces hardware footprint, power consumption, and cost.

1. Key Hardware Parameters

- Logic and Memory Resources: Incorporates 39K logic cells with on-chip memory up to 3Mb (including EBR and LRAM). Its favourable memory-to-logic ratio enables efficient caching of video frame data and storage of AI model weights, minimising external memory accesses and reducing data transmission latency.

- Computing Power: Integrates 56 18×18 multiplier DSP modules, delivering ample computational resources to efficiently support lightweight CNN inference. This meets the computational demands of edge AI tasks such as object detection, image classification, and defect recognition.

- Hard-Coded Interface Advantages: Incorporates two sets of 4-channel MIPI D-PHY hard-coded transceivers, each channel operating at 2.5Gbps with a single PHY aggregate bandwidth of 10Gbps. Natively supports MIPI CSI-2 image sensor input and MIPI DSI display output, enabling high-speed MIPI signal transmission without consuming logic resources. Additionally supports 5Gbps PCIe, programmable LVDS/SubLVDS/OpenLDI interfaces, offering exceptional protocol conversion compatibility.

- Low Power Consumption and Reliability: Achieves 75% lower power consumption compared to similar FPGAs, with standby current below 70μA. Supports 3ms rapid I/O configuration and 8ms instantaneous system boot-up. Soft error rate reduced by over 100 times, making it suitable for demanding industrial and automotive environments while meeting requirements for long-term stable operation.

2. Core Technological Advantages

Compared to traditional ASIC bridge chips and general-purpose FPGAs, the LIFCL-40-8BG400C achieves **single-chip integration of MIPI bridging and edge AI**. It combines the low latency and high stability of dedicated bridge chips with the programmable flexibility of FPGAs, enabling rapid adaptation to diverse MIPI devices and custom AI models while maintaining low power consumption and compact form factor. This resolves core challenges in edge computing scenarios, including insufficient computing power, interface incompatibility, power constraints, and oversized components.

II. MIPI Bridging Functionality: High-Speed, Flexible, Multi-Scenario Adaptability

MIPI CSI-2/DSI represents the mainstream high-speed interfaces for image sensors and displays. However, mainstream processors and host controllers often suffer from limited interface availability and inadequate protocol compatibility. LIFCL-40-8BG400C leverages its native MIPI D-PHY hard core and programmable logic architecture to enable diverse MIPI bridging and protocol conversion. This satisfies requirements for multi-sensor integration, interface expansion, and signal relay, delivering uncompressed, low-latency transmission of high-definition video streams throughout.

1. Typical MIPI Bridging Solution Architecture

Multi-MIPI Sensor Aggregation Bridging

For applications such as automotive surround-view systems, industrial multi-camera inspection, and security panoramic monitoring, the LIFCL-40-8BG400C aggregates data from up to 11 MIPI CSI-2 sensors. Utilising virtual channel technology, it arbitrates and stitches multiple data streams, consolidating dispersed sensor data into a single high-speed MIPI data stream output to the host processor. This elegantly resolves the limitation of insufficient MIPI interfaces on the host controller. Simultaneously supporting horizontal/vertical frame stitching, it leverages on-chip memory and external DDR buffers to output ultra-high-definition panoramic imagery, catering to wide-field visual monitoring applications.

MIPI and Heterogeneous Interface Protocol Conversion

Utilising programmable I/O and high-speed SERDES resources, this chip facilitates bidirectional conversion between MIPI CSI-2 and interfaces such as PCIe, USB3.2 Gen1, LVDS, and CMOS interfaces. For instance, it converts MIPI sensor signals into USB3.0 video streams for direct connection to PCs/embedded controllers, or transforms traditional LVDS display signals into MIPI DSI signals to drive high-definition screens. This facilitates intelligent upgrades for legacy equipment and cross-platform device interconnectivity, enabling interface adaptation without replacing core controllers.

MIPI Signal Repeating and Splitting

For long-distance transmission and multi-device multiplexing scenarios, this enables MIPI signal repeating amplification and one-to-many output. This ensures high-speed signal transmission integrity while simultaneously supplying a single sensor signal to multiple display/processing units, enhancing system scalability. Suitable for automotive infotainment, industrial display linkage, and similar applications.

2. Core Advantages of Bridging Implementation

- Low-latency transmission: A hard-coded MIPI D-PHY combined with a programmable logic architecture achieves video stream forwarding latency below the millisecond level. This guarantees real-time high-definition video performance, making it suitable for dynamic monitoring and real-time control scenarios.

- Lossless transmission: Supports lossless video data forwarding, preserving original image quality and avoiding degradation caused by compression and decoding. This meets the demands of high-precision visual inspection.

- Programmable Adaptability: Flexible configuration of MIPI channel count, transmission rates, and protocol parameters enables rapid adaptation to diverse sensor and display models, shortening product development cycles.

III. Edge AI Inference Implementation: Lightweight, Low-Power, On-Device Real-Time Intelligence

LIFCL-40-8BG400C leverages the Lattice sensAI™ solution stack and Radiant development toolchain to perform lightweight AI inference at the edge without relying on cloud computing power or high-end controllers. It achieves a fully closed-loop process encompassing **MIPI video stream acquisition – pre-processing – AI inference – result output**, alleviating computational pressure on the main controller and delivering true edge intelligence.

1. Edge AI Deployment Process

Model Adaptation and Optimisation

Tailored for edge scenarios with constrained computing and storage, lightweight models such as MobileNet, YOLO-tiny, and CNN are selected. The sensAI toolchain performs model pruning, quantisation, and compilation to compress weights for on-chip storage adaptation, reducing computational overhead while maintaining inference accuracy. This ensures seamless alignment between models and chip hardware resources.

Video Pre-processing and Inference Coordination

Leveraging the chip's programmable logic, image pre-processing is synchronously executed during MIPI bridging transmission. This includes demosaicing, colour correction, gamma correction, and Region of Interest (ROI) cropping to eliminate redundant data, thereby reducing computational overhead for AI inference. The pre-processed image data is directly fed into the DSP acceleration unit to complete inference tasks such as object detection, facial recognition, defect identification, and counting statistics. This end-to-end pipeline operation ensures seamless processing without data bottlenecks.

Inference Output and Interoperability

AI inference results can be synchronously output via MIPI, GPIO, UART, or other interfaces. These outputs may either be overlaid onto the raw video stream for display or transmitted to the main control chip to trigger subsequent actions. This achieves an edge-side intelligent closed-loop of ‘perception-decision-execution’ without cloud involvement, delivering faster response times and enhanced data privacy.

2. Typical Edge AI Application Scenarios

- Industrial Vision Inspection: Integrates with MIPI industrial cameras to perform real-time defect identification, part counting, and specification verification, replacing manual inspection while enhancing accuracy and efficiency.

- In-Vehicle Intelligent Perception: Aggregates data from MIPI in-vehicle cameras to enable driver fatigue monitoring, obstacle detection, and lane departure warnings, supporting advanced driver assistance systems with low-power consumption suited to automotive power environments.

- Security Surveillance: Implements human form detection, perimeter intrusion alerts, and facial recognition. Local inference and alerting reduce cloud transmission load while improving alert responsiveness.

- Consumer Electronics Interaction: Drives MIPI cameras and displays for gesture recognition and facial unlocking, with low-power operation optimised for portable device battery life.

IV. Single-Chip Convergence Solution: Synergistic Advantages of MIPI Bridging + Edge AI

Traditional edge vision solutions predominantly employ a dual-chip architecture of ‘MIPI bridge chip + AI accelerator chip,’ suffering from hardware complexity, elevated power consumption, increased latency, and persistently high costs. The LIFCL-40-8BG400C achieves single-chip integration of MIPI bridging and edge AI, delivering significant core synergistic benefits:

- Minimalist hardware, drastically reduced form factor: Single-chip replacement of dual-chip solutions reduces PCB layout space, enabling adaptation to compact, portable devices while lowering BOM costs and simplifying hardware debugging.

- Low-power operation, worry-free endurance: FD-SOI process technology combined with hard-core optimisation achieves total system power consumption below 1.5W, with standby power in the microampere range. This facilitates battery-powered operation in edge scenarios without active cooling.

- Full-chain low latency: Eliminates inter-chip data transmission delays, enabling seamless video capture, bridging, and AI inference to meet stringent real-time requirements.

- High reliability for harsh environments: Supports industrial/automotive temperature ranges with robust interference resistance. Instant-on capability ensures rapid device power-up for industrial and automotive applications.

V. Conclusion

Lattice's LIFCL-40-8BG400C CrossLink-NX™ FPGA achieves seamless integration of native MIPI hardware cores, substantial computing power, low-power characteristics, and programmability. achieves seamless single-chip integration of MIPI bridging and edge AI. This resolves interface incompatibility and multi-sensor connectivity challenges in embedded vision scenarios while enabling real-time intelligent inference at the edge, balancing performance, power consumption, form factor, and cost. Whether in industrial vision, automotive intelligence, security surveillance, or consumer electronics, this chip represents an ideal choice for lightweight, low-power edge vision intelligence solutions. It facilitates rapid intelligent upgrades for devices while aligning with the evolving landscape of edge computing.