TMC2081 Datasheet, PDF (1/32 Pages) Fairchild Semiconductor – Digital Video Mixer

TMC2081
Digital Video Mixer
www.fairchildsemi.com
Features
• Mixes 24//16-bit GBR/YCBCR444//YCBCR422 and 8-bit
color-index sources
• 24//16-bit GBR/YCBCR444//YCBCR422 output
• 255-step proportional mixing via a7-0 inputs
• 256-step mixing with a8-0 for a=100h unity gain
• 256 x 8-bit look-up table on a channel
• Lap-dissolve and fade effects
• a and crosspoint controls for soft and color-border wipe
generation
• Mask register and three 256 x 8 bypassable CLUTs with
overlay on A-channel
• Analog preview output with sync on Green/Y
• D/A power-down modes
• Single +5 volt power supply operation
• Pin compatible with TMC22080 Digital Mixer
Applications
• Mixing computer graphics and live video
• Lap-dissolve between video sources
• Fade to black or to user-selectable fill color
• Window/wipe processing
Logic Symbol
Description
The TMC2081 is a Digital Video Mixer that performs
M = ( a ) V1 + ( 1-a ) V2 (for 0 £ a £ 1)
cross-fading at speeds faster than 40 Mpps proportionally
controlled by a 9-bit a-channel input. Variable rate dissolves
and fades may be implementedwith unity gain at the a end-
points. With the a-Look-Up Table (aLUT), mixing may be
controlled by a single bit of the a-channel input. Setup is via
a microprocessor interface.
Supported video formats are 24-bit GBR, YCBCR444, and
16-bit YCBCR422 component video. Dissimilar pixel for-
mats may be mixed using on-chip interpolation and decima-
tion filters and GBR/YCBCR and YCBCR/GBR color-space
conversion matrices.
An additional format accepted by the A-channel is 8-bit
color-indexed pixel data which addresses three bypassable
256 x 8 color look-up tables (CLUTs). A 15 color overlay
palette and a 24-bit fill register are also included.
Digital and Analog outputs may be programmed to view
either mixer inputs, V1 or V2 or mixer output, M.
Packaged in a 128-lead plastic metric quad flat-pack
(MQFP), the TMC2081 is fabricated with a sub-micron
CMOS process. Performance is guaranteed over the com-
mercial, 0°C to 70°C temperature range.
PDA23-0
PDB23-0
a_8-0
AV
PASSEN
SIG0
CLK
OL3-0
SMX2-0
SYNC
BLANK
D7-0
D2-0
CS
R/W
TMC2081
DIGITAL
VIDEO
MIXER
M23-0
PASS14
SIG14
AVOUT
G/Y
B/CB
R/CR
COMP
VREF
RREF
65-2081-01
Rev. 1.3.0