VV0670P001 View Datasheet(PDF) - Vision
Part Name
Description
Manufacturer
VV0670P001 Datasheet PDF : 36 Pages
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VISION CPiA
Colour Processor Interface ASIC
DATASHEET
FEATURES
• Interfaces to Vision’s VV6404 colour CMOS
image sensor
• Directly interfaces to a host PC using USB or
Parallel port interfaces
• 100% compliant with USB specification v1.0
• 100% compliant with IEEE1284 parallel port
specifications
• Support for Windows 95/98 Plug and Play
• Image capture at CIF (352x288) and
QCIF(176x144) resolutions
• Image compression providing up to 30fps CIF
• Automatic exposure control and colour balance
• Camera flicker control for 50 Hz and 60 Hz
mains driven lighting
• Supports selective transfer of requested
regions of interest to the host system
• Power management including watchdog reset
• Absolute minimum of support components
• Device pinout designed to facilitate layout and
area of support PCB
GENERAL DESCRIPTION
The Colour Processor Interface ASIC (CPiA) is a
digital video processor requiring only a single
4Mbit DRAM and minimum of passive support
components to provide a complete PC peripheral
video capture system.
CPiA accepts raw digital video data from Vision’s
CIF format CMOS sensors and is capable of
transferring the resulting YUV video data to a host
PC over either USB or Parallel Port interfaces at
rates up to 30 frames per second.
The CPiA architecture consists of three
conceptually separate functional blocks: the Video
Processor (VP), the Video Compressor (VC) and
the Control Processor (CP).
The VP controls the VVL404 sensor and
processes the raw pixel data into CIF or QCIF
YUV images for compression and transfer to the
Host by the VC.
The CP is responsible for coordinating system
operation, responding to host requests and
commands as well as performing automatic camera
exposure control and colour balance.
CPiA SYSTEM BLOCK DIAGRAM
VVL404
Image
Sensor
VC
VP
CP
CPiA
USB
PP(host)
PP(pass)
DRAM
Commercial In Confidence
V:\apps\cpia\docs\cpia datasheet\cpia_datasheet4.fm
02/07/98
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