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WT8921

【 General Description 】

The WT8921 is a high performance image processor which incorporates a 32-bit RISC CPU with DSP instruction set that operates up to 192 MHz and rich vision-processing-units/interfaces such as scaler, lens correction, image mask, and etc. The WT8921 provides a powerful Vision Acceleration Engine (VAE) to support video-out interface, UART, USB, and SPI for the projector system.

The WT8921 takes three dimensional data inputs from the ToF (Time-of-Flight) sensor and the G-sensor in a smart project system. With advanced algorithms inside, the WT8921 enables fast and intelligent self-adjustment of the projector, such as automatic keystone detection or automatic lens focusing, to center the image to fit the screen.

By integrating a ToF sensor, a G-sensor, and the WT8921 into a hardware module, it can speed up the smart projector system design cycle time and shorten the time-to-market.

【 Features 】
●	Embedded 32-bit RISC CPU core
	- DSP instruction set
	- Up to 192 MHz operation frequency
●	Memory
	- Embedded serial flash
	- Internal 64 KB ILM
	- Internal 32 KB DLM
	- 256 KB optimized frame buffers for video data storage and CPU access
	- 256 KB virtual memory of VAE
●	Vision Acceleration Engines (VAE)
	- Perspective, Mask, Binarization, Line Detection, Pixel
●	Video inputs
	- ITU BT.601 / ITU BT.656 YUV
	- Video formats: VGA (0.3MP, 640x480 or 752x480)
●	Video outputs
	- ITU BT.601 / ITU BT.656 YUV
●	On screen display (OSD)
●	Embedded LDO 2.8V for CMOS sensor
●	Communication interfaces
	- ISP and ICE interface
	- 1 Quad SPI for Serial Flash Controller interface up to 96 MHz
	- 1 USB device I/F (Complete compatible with Universal Serial Bus specification 2.0 Full Speed)
	- 1 master/slave mode I2C interfaces up to 400 kHz
	- 2 full-duplex UART up to 1.5 MHz
	- 1 master/slave SPI up to 12 MHz
	- 2 PWM 12-bit for voice
●	Timer with 16-bit prescaler
●	GPIO with configurable input/output direction and pull-up/pull-down resistor
●	Window Watchdog Timer (WWDT)
●	CPU clock source
	- External crystal oscillator 24 MHz (built-in PLL)
●	Power consumption
	- Power supply 3.3V
●	Operating temperature range: -40℃ to +85℃
●	Package type: QFN-64 (8x8)
【 Applications 】
●	Projector Automatic Keystone Correction or Auto Focus or Corner Projection

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