Sipeed Wiki

2025-07-10

Introduction

The M4N-Dock is an edge computing box featuring hybrid-precision computing capabilities, developed by Sipeed and powered by AXERA's third-generation high-efficiency AI vision chip, the AX650N. It delivers an impressive 72 TOPS@INT4 or 18 TOPS@INT8 of built-in AI computing power, capable of running popular large-scale AI models.

Equipped with an advanced ISP supporting 8K@30fps video processing and AXERA's proprietary AI-ISP technology for superior low-light night vision performance, it also integrates H.264/H.265 codecs capable of stable 8K@60fps decoding and 8K@30fps encoding. Real-world testing demonstrates reliable 32-channel 1080P@30fps decoding and 16-channel 1080P@30fps encoding.

The AX650N chip features comprehensive interfaces including 64-bit LPDDR4x memory, multi-channel MIPI input, Gigabit Ethernet, USB 3.0, and HDMI 2.0b output. Combining powerful computing with exceptional codec capabilities, it meets industry demands for high-performance edge AI computing.

The single-core NPU delivers outstanding performance (single-core performance), achieving:

130 FPS (7.66ms latency) for yolov5s at 640×640 resolution
1798 FPS (0.556ms latency) for MobileNetV2 at 224×224 resolution

Supporting diverse deep learning algorithms, it enables applications including visual structuring, behavior analysis, and status detection, with optimized support for Transformer architectures and large vision models. Comprehensive development documentation facilitates secondary development for customized solutions.

Key Specifications

Component	Description
CPU	8x A55@1.7Ghz, integrated FPU, supports NEON acceleration
NPU	72 TOPS@INT4 / 18 TOPS@INT8, supporting INT4/INT8/INT16/FP16/FP32 inputs, TopN (N<=32)
ISP	Supports up to 8192x4320@30fps, maximum resolution: 16384x16384, featuring AI-ISP (low-light night vision)
CODEC	H.264/H.265 encoding/decoding, up to 8K@60fps decoding & 8K@30fps encoding capability
DSP	Dual-core 800MHz
Memory	8GB 64-bit LPDDR4x (adjustable allocation: default 2GB system + 6GB AI CMM)
Storage	32GB eMMC 5.1 onboard (system storage) plus 3x SATA 3.0 6Gb/s (1× M.2 + 2× standard SATA ports)
Video Output	Dual HDMI 2.0a (4K@60fps max)
Video Input	Dual 4-lane MIPI-CSI camera interfaces (3.5Gbps)
Network	Dual Gigabit Ethernet ports (tested throughput: 944Mbps)
PCIE	1-lane PCIe 2.0 (5Gbps) via Mini-PCIe interface
USB	1× USB3.2 Gen1 (5Gbps) + 3× USB2.0 (480Mbps) (blue port farthest from Ethernet is OTG programming port)
Others	1x RS485 + 1x RS232 + 3x user controlled led