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參數資料
| 型號： | W9967CF |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 消費家電 |
| 英文描述： | JPEG USB Camera Chip(運用JPEG壓縮技術和通用串行總線結構技術的照相電路數字處理芯片的攝像照相機接口控制器) |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP128 |
| 封裝： | 14 X 20 MM, 2.75 MM HEIGHT, QFP-128 |
| 文件頁數： | 7/74頁 |
| 文件大小： | 762K |
| 代理商： | W9967CF |
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W9967CF
Publication Release Date: May 1999
- 7 -
Revision A4
1
GENERAL DESCRIPTION
The W9967CF is a digital video processing chip offered by Winbond to facilitate adapterless
connection between digital video camera and personal computer for video and still image capturing
and editing, video e-mail, and video conferencing applications. Low-cost, high-performance, and
high-quality digital video camera can be realized by using Winbond
′
s W9967CF, which includes
Universal Serial Bus (USB) technology and the international standard JPEG compression.
The digital video camera is becoming the next great input device for the PC. USB is now a common
PC standard for connecting peripheral products, which features low cost, hot-attachable plug and
play, adequate 12 Mb/s full speed bandwidth, and simultaneous attachment of multiple devices. The
W9967CF has built-in full speed USB controller which benefits from using the isochronous data
transfer mode of the USB bus, and which is compliant with the full power management requirements
of the USB specification, including startup, operating, and suspend modes. To prevent saturation of
the USB bus, the W9967CF uses no more than 8 Mb/s of available bandwidth to ensure the continued
operation of other low bandwidth devices such as USB mice and keyboards.
Although USB provides a low-cost solution for low to medium speed peripherals, its 12 Mb/s
bandwidth is not enough for high-quality and high-performance digital video camera. High-quality and
low-cost compression is necessary to boost frame rate for a high-performance digital video camera.
The W9967CF has built-in the baseline JPEG compression, which corresponds to the ISO/IEC
international standard 10918-1, with YCbCr4:2:2 or YCbCr4:2:0 components in non-interleaved scan.
The baseline JPEG implementation in the W9967CF includes Discrete Cosine Transform (DCT),
quantization, zig-zag scan, and Huffman encoder. With JPEG compression, the W9967CF can easily
achieve good quality 30 frames per second (fps) in CIF resolution (352
×
288) and 10~15 fps in VGA
resolution (640
×
480) by consuming no more than 8 Mb/s USB bandwidth.
The W9967CF can accept NTSC, PAL, or VGA video in 8- or 16-bit YCbCr4:2:2 format, square or
rectangular pixels, and converts to sub-QCIF (128
×
96), QCIF (176
×
144), CIF (128
×
96), SIF
(352
×
240), 320
×
240, or VGA (640
×
480) format. Built-in cropping window control and arbitrary scaling
in both the horizontal and vertical directions can serve as the digital pan and zoom over a user-
specified region for camera control.
An on-chip DRAM controller is used to interface to SDRAM or EDO DRAM through a 16-bit data bus.
An external serial E
2
PROM is also supported if IHV-specific Vendor ID and Product ID are needed.
The W9967CF is a 3.3 V device with TTL-compatible 3.3 V or 5.0 V I/O, and is packaged in a 128L
QFP.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| W99681CF | 制造商:WINBOND 制造商全稱:Winbond 功能描述:JPEG USB Dual Mode Camera Chip |
| W99685 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| W99685BS | 制造商:WINBOND 制造商全稱:Winbond 功能描述:SYSTEM CAMERA DEVICE |
| W99685FS | 制造商:WINBOND 制造商全稱:Winbond 功能描述:SYSTEM CAMERA DEVICE |
| W9968CF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Camera |
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