
Product Overview
CX320L66SN is a second‑generation high‑performance UWB SoC from Chixin Semiconductor, designed for intelligent automotive, precise positioning, IoT and consumer electronics applications. It supports ranging, AoA direction finding, radar sensing and high‑speed data transmission, with ultra‑low power consumption, high integration, high precision and high security. It is fully compliant with IEEE 802.15.4a/z/ab HRP, FiRa, CCC and ICCE protocols, meeting stringent automotive and industrial‑grade requirements.
Product Features
Compliant with IEEE 802.15.4a HRP / IEEE 802.15.4z HRP / IEEE 802.15.4ab HRP / FiRa / CCC / ICCE
6 GHz–9 GHz frequency band with 499.2 MHz wide channel bandwidth
Supports TWR, AoA, ToA, TDoA and PDoA full‑scenario positioning algorithms
Dual‑core STAR‑MC1 32‑bit processors (AP/CP up to 249.6 MHz each), with DSP and FPU
Built‑in security engine: AES, ECC, SHA, CRC, secure boot and secure debug
1T1R high‑performance transceiver architecture, compliant with FCC/CE/SRRC radio regulations
Maximum transmit power 9 dBm, dynamically adjustable
Data rates: 850 kbps ~ 124.8 Mbps, multiple options available
Maximum packet length 4095 bytes for high‑throughput applications
Integrated DC‑DC, LDO, RF front‑end and matching network, supports auto‑calibration
Rich interfaces: SPI/UART/I2C/SWD/SDIO/I2S/GPADC
On‑chip 8 M‑bit Flash, 384 KB RAM and multi‑level Cache
6 mm × 6 mm 40‑pin LGA package, minimal external components
Wide supply voltage: 1.8 V–3.6 V, industrial temperature range
Product Advantages
Fully coherent receiver, ±5 cm ranging accuracy, ±3° AoA accuracy
Radar ranging accuracy ±7.5 cm, supports human presence / micro‑motion / occupancy detection
Dual‑core heterogeneous architecture, protocol stack and application run independently for stronger performance
Highly integrated single‑chip solution, low BOM cost and easy mass production
Multi‑level low‑power modes: 10 nA in hard power down, 1.55 μA in deep sleep, 9 μA in RAM retention mode
Built‑in security mechanism for high‑security scenarios such as automotive digital key
Automatic RF calibration for excellent mass production consistency
Supports concurrent scheduling of radar, ranging, direction finding and data transmission
Locally developed in China with full‑stack technology controllability
Applications
Precise Positioning: asset tracking, RTLS, indoor positioning, warehouse and logistics
Intelligent Automotive: CCC/FiRa digital key, in‑vehicle occupant detection
Consumer Electronics: smartphone precise ranging, AR/VR spatial positioning, smart door lock
IoT: smart home radar, presence detection, device anti‑loss
Industry: industrial sensing, robot positioning, security monitoring
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