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PDF Bt254 Data sheet ( Hoja de datos )
| Número de pieza | Bt254 | |
| Descripción | 30 MSPS Monolithic CMOS Triple-Channel 8-bit Image Digitizer | |
| Fabricantes | Brooktree | |
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Advance Information
This document contains information on a product under development. The parametric
information contains target parameters and is subject to change.
Bt254
Distinguishing Features Applications
• 30, 20 MSPS Operation
• Image Processing
• Bt253 Pin Compatible
• Image Capture
• Three 8-bit Video A/D Converters
• Desktop Publishing
• Two Sets Software-Selectable Analog Inputs • Graphic Art Systems
• Optional MPU Adjustment of Gain and Offset
• Composite Sync Detection
• Genlock Externally Implemented
Related Products
• Standard MPU Interface
• TTL Compatible
• +5 V CMOS Monolithic Construction
• Bt252
• Bt261
• 84-pin PLCC Package
• Typical Power Dissipation: 1.5 W
Functional Block Diagram
Brooktree Corporation
9950 Barnes Canyon Rd.
San Diego, CA 92121-2790
(619) 452-7580 • (800) VIDEO IC
TLX: 383 596 • FAX: (619) 452-1249
L254001 Rev. B
30 MSPS
Monolithic CMOS
Triple-Channel
8-bit Image Digitizer
Product Description
The Bt254 Image Digitizer is designed to digitize
three channels of video signals, such as RGB,
YIQ, YUV, etc., generating up to 24 bits of color
pixel information. The architecture also supports
single-channel digitization of NTSC and CCIR
video signals, generating 8 bits of gray-scale
pixel information.
The Bt254 supports 24-bit true-color, 15-bit
true-color, 8-bit true-color, and 8-bit pseudo-color
modes. A standard MPU interface is provided for
accessing various control functions.
Six analog inputs (two for each A/D) are
supported, selectable under MPU control. The
MPU may select from which input to detect sync
information for external genlocking. A
TTL-compatible composite sync signal is output
to interface to genlock circuitry. Two additional
sync inputs are also provided to support red,
green, and blue sync video interfaces.
Optional MPU-controlled adjustment of gain and
offset is supported by the ability to program the
levels of the REF+ and REF- inputs to the A/D
converters. Zeroing and clamping signals are
available to control the A/D timing for
application-specific timing. The clamping levels
are externally set via the red, green, and blue
LEVEL pins.
Each A/D converter has its own clock input,
top/bottom references, and LEVEL pin.
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Bt254
Figure 3. Typical Bt254 External Circuitry.
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Bt254
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| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet Bt254.PDF ] | |
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