參數(shù)資料
型號(hào): TMC22191KHC
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 顏色信號(hào)轉(zhuǎn)換
英文描述: Digital Video Encoders/Layering Engine
中文描述: COLOR SIGNAL ENCODER, PQFP100
封裝: 3.20 MM HEIGHT, MQFP-100
文件頁數(shù): 3/60頁
文件大?。?/td> 293K
代理商: TMC22191KHC
PRODUCT SPECIFICATION
TMC22091/TMC22191
3
Mask Register
A Mask Register is provided which is logically ANDed with
incoming color-index data to facilitate pixel animation and
other special graphics effects. The Mask Register is ahead of
the Data Key comparators and is enabled only when color-
index input is selected. Mask Register programming and
operation are similar to that of the 171/176 family of graph-
ics RAMDACS.
Color Lookup Table
The Color Lookup Table (CLUT) is a 256 x 8 x 3 random-
access memory. It provides means for offset, gain, gamma,
and color correction in RGB and YC
B
C
R
operating modes. It
provides a full 24-bit color lookup function for color-index
mode. It can be loaded in the same manner as a standard
VGA RAMDAC.
Colorspace Conversion Matrix and
Interpolator
The matrix converts RGB data (whether from RGB inputs or
color-indexed CLUT data) into Y, B-Y, R-Y format for
encoding. In input configurations where the pixel input is
already in Y, B-Y, R-Y format, the matrix is bypassed. When
pixel data is input in YC
B
C
R
422 format, the interpolation fil-
ters produce YC
B
C
R
444 for encoding.
Sync Generator
The TMC22x91 can operate in Master, Genlock, or Slave
modes. In Master and Genlock modes, the encoder internally
generates all timing and sync signals, and provides Horizon-
tal Sync, Vertical Sync, and Pixel Data Control (PDC) to the
external frame buffer circuitry. PDC is independently select-
able to function as an input or an output. In Genlock mode,
the TMC22x91 timing is controlled by the TMC22071 Gen-
locking Video Digitizer over the CVBS
7-0
bus, GVSYNC,
and GHSYNC. The encoder, in turn, produces VHSYNC,
VVSYNC, and PDC for the frame buffer interface.
Figure 1a. Pixel Data Format
MSB
23
LSB
0
16
GBR444
MODE
24300A
RGB444
YCBCR444
YCBCR422
COLOR INDEX
GBR15
RGB15
00011000
Format Control Register
00010000
00011100
00011101
0001X011
00011010
00010010
G
B
R
R
G
B
Y
C
B
C
R
G
B
R
R
G
B
Y
C
B/
C
R
Pixel
15
G
7
G
0
B7
B
0
R
7
R
0
R
7
R
0
G
7
G
0
B
7
B
0
Y
7
Y
0
C
B7
C
B0
R
R7
R
R0
Y
7
Y
0
C
B7
C
R7
C
B0
C
R0
P
7
P
0
G
4
R
0
R
4
G
0
R
0
B
4
G
4
B
0
G
0
R
4
B
4
B
0
8
7
MSB
LSB
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