Smart Projector
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 |