Document
STV0974
Mobile Imaging DSP
Features
■ Supports VS6552 - 640 x 480 (VGA) color CMOS image sensor ■ Supports VisionLink low EMI link to image sensor ■ Specialized video processor for noise/defect filtering, color reconstruction, sharpness enhancement and radial corrections ■ Programmable gamma correction for LCD support ■ Programmable cropping, down-sizing by 1.5, 2, 2.5, 3, 4, 5 and 6, MMS (Multi Media Messaging Service) digital zoom ■ JPEG compression, with programmable target file size ■ M-JPEG operation at up to 30 frame/s at VGA resolution ■ Programmable pixel output format including ITU-R 656 modes, RGB viewfinder modes and JPEG baseline ■ Flashgun control ■ Flexible host interface:
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Description
The STV0974 is a low power digital image processor designed for the VS6552 color VGA image sensor. The STV0974 uses advanced image processing techniques to deliver high quality VGA images at up to 30 frames per second (frame/s). The sensor data received via the low EMI sensor interface is processed in real time: this includes pixel defect correction, color interpolation, image sharpness enhancement, selective noise filtering, cropping and scaling, allowing digital zoom for ViewFinder or MMS applications. Finally the image can be JPEG-compressed in real-time. The STV0974 also performs sensor housekeeping functions such as automatic exposure and white balance controls.
Applications
■ Mobile phone embedded camera system ■ PDA embedded camera or accessory camera ■ Wireless security camera
Technical Specifications
Sensor Frame rate (frame/s) Power supply Power requirements Package dimensions Temperature range 640 x 480 color CMOS (VS6552) up to 30 1.8 +/- 0.1 V 110 mW active < 30 µW standby 6 mm x 6 mm x 1.2 mm [ -25; +70 ] °C
8-bit data /Hsync /Vsync video output interface and I²C camera control interface 8-bit microprocessor interface with 2 Kbyte video FIFO for JPEG data, 10 Kbyte for nonJPEG data, interrupt and DMA requests
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■ Multi-mode exposure control and color balance ■ 30 µW ultra low-power standby ■ 6 x 6 mm TFBGA low-footprint & lead-free package
Ordering Information
Ordering code
STV0974/TR STV0974E/TR
Package
TFBGA SnPb balls TFBGA AFOP lead-free balls
Rev. 3 November 2004 1/69
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STV0974
Contents
Chapter 1
1.1 1.2 1.3
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Viewfinder mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Still features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Live features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2 Chapter 3 Chapter 4
4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10
Functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Sensor interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Video processing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Video compression (VC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Microprocessor interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Video output interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Power management unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Clock input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Camera control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Additional features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Chapter 5
5.1 5.2 5.3 5.4 5.5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Thermal data . . . . . . . . . . . . . . . . . . . ..