The CH9355 is a USB 2.0 HS/FS and UVC compliant camera controller designed for USB imaging and video applications. It integrates a high-performance USB 2.0 transceiver, an advanced image processing architecture, flexible peripheral control interfaces,an embedded MCU, and power management circuits into a single-chip solution.
The integrated ultra-low-power USB transceiver provides excellent compatibility with various USB host platforms while delivering stable high-speed data transmission and optimized image quality performance.
CH9355 supports RGB/IR camera designs for Windows Hello compatible authentication systems.
CH9355 is suitable for a wide range of USB camera applications, including webcams, AI cameras, industrial cameras, embedded vision systems, and biometric authentication cameras.
—USB 2.0 Controller
CH9355 integrates a USB 2.0 High-Speed/Full-Speed compliant transceiver and protocol controller optimized for efficient utilization of the 480 Mbps USB bandwidth to support high-quality video streaming applications.
The device supports UVC 1.0-, 1.1-, and 1.5-compliant video streaming, ensuring broad compatibility with major operating systems and USB host platforms.
—Image Signal Processing Unit
CH9355 integrates a 14th-generation ISP engine that supports comprehensive UVC image controls and advanced restoration features. In addition, this ISP includes functions such as Lens Shading Correction, Dead Pixel Correction, Color Correction Matrix, histogram-based Auto Exposure, and gray-world-based Auto White Balance. To achieve superior low-light performance, the ISP deploys a dual-mode noise-reduction framework: a hardware-based 4th-generation Temporal Noise Reduction (TNR) engine for high-throughput, low-latency stream processing, complemented by a software-implemented 8th-generation TNR algorithm for advanced, scene-adaptive noise suppression.
—Image Sensor Interface
CH9355 integrates dual MIPI CSI-2 interfaces, including a 2-lane interface for RGB CMOS image sensors and a dedicated 1-lane interface for IR CMOS image sensors. The RGB interface supports resolutions from VGA (640 x480) up to5 MP (2880x1800), while the IR interface supports resolutions from VGA (640x480) up to 1 MP (1280x720). This architecture enables broad compatibility with mainstream CMOS image sensors for RGB-IR camera applications.
—Audio Interface
CH9355 integrates a PDM interface for direct connection to digital MEMS microphones (DMICs), supporting mono or stereo 16-bit audio capture at sampling rates of 8 kHz, 16 kHz, 24 kHz, and 48 kHz. The integrated audio interface reduces external component count and simplifies PCB design. Audio data can be synchronized with USB video streaming for integrated audio and video applications.
—Built-in Regulators
CH9355 integrates four internal LDO regulators to reduce external component count and PCB area requirements.
The integrated regulators provide dedicated power domains for core logic, sensor analog power, sensor I/O power, and peripheral I/O power.
Configurable output voltages include 1.2 V, 1.8 V, and 2.8 V to support both the controller core and external CMOS image sensor power requirements.
—Wide-Range System Clock Output
CH9355 supports programmable system clock generation with dynamic frequency adjustment for performance and power management optimization.
Programmable clock outputs up to 48 MHz are provided for external image sensor operation.
Flexible clock configuration enables compatibility with a wide range of CMOS image sensors while reducing external clock generation components and PCB complexity.
