BYD launches China’s first 4nm autonomous driving chip

BYD Unveils Xuanji A3, China’s First 4nm Automotive Smart Driving Chip

BYD on Thursday launched the Xuanji A3, a self-developed 4-nanometer autonomous driving chip that the company called China’s first automotive-grade processor built on the advanced node. The unveiling took place at BYD’s Intelligent Strategy Launch event, where CEO Wang Chuanfu said the chip “represents the highest level of intelligent driving chips in China” and supports Level 3 and Level 4 autonomous driving.electrek

The chip has already entered mass production, BYD said, and will underpin the latest version of its God’s Eye driver-assistance system as the company pushes to bring city-navigation features to mass-market vehicles.carnewschina

Technical Specs and Vertical Integration

The Xuanji A3 features a 16-core CPU, 273 gigabytes per second of bandwidth, and 420,000 DMIPS of processing performance. A three-chip configuration delivers more than 2,100 TOPS of total vehicle compute, according to BYD. The company said the chip draws about 20 percent less power than comparable products and meets ASIL-D, the highest automotive functional-safety rating.eletric-vehicles

BYD described itself as the only automaker globally with full-process chip-manufacturing capability, covering product definition, architecture and circuit design, layout, wafer fabrication, packaging, and testing. The company said it operates five wafer-fabrication plants, employs more than 7,000 chip researchers, and has invested over 100 billion yuan (roughly $14.7 billion) into semiconductors since establishing its first chip department in 2002.electrek

Targeting the Mass Market — and Tesla

The chip powers BYD’s upgraded God’s Eye 5.0 platform, which the company is pairing with a new LiDAR system offering 1.6 times the angular resolution of its prior generation and 4D millimeter-wave radar with a 400-meter detection range. BYD is offering its LiDAR-based city navigation as a 12,000-yuan option across most of its lineup, well below the 64,000-yuan price of Tesla’s assisted-driving package in China.eletric-vehicles

BYD said 3.15 million of its vehicles now carry assisted-driving hardware, generating 200 million kilometers of driving data daily. To signal confidence in the system, the company announced a one-year safety guarantee for city-navigation users, covering both new buyers and existing owners who upgrade over the air — with no payout cap.cnevpost