參數(shù)資料
型號: 9402AVK
廠商: MICRONAS SEMICONDUCTOR HOLDING AG
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝: 14 X 14 MM, 2 MM HEIGHT, PLASTIC, MS-022, MQFP-80
文件頁數(shù): 40/126頁
文件大?。?/td> 1673K
代理商: 9402AVK
DATA SHEET
20
Aug. 16, 2004; 6251-552-1DS
Micronas
Fig. 2–27: HW/SW Partitioning
The letterbox detection block works only at a data rate
of 13.5 MHz. Due to the fact, that the input data rate at
channel-mux output can be 13.5 MHz, 20.25 MHz or
40.5 MHz, the input signal has to be downsampled.
Depending on the I2C bus register LBSUB different
modes are possible (Downsample 1, 1.5, 3). As digital
656input data are already in 13.5 MHz format, no
downsampling should be used (LBSUB=0). For CVBS,
YUV and RGB signals (if DECTWO=1) a downsam-
pling of 1.5 (LBSUB=2) is required.
In principle the input picture is separated in one upper
and one lower part. The measurement windows are
defined
by
the
parameters
LBVWSTUP,
LBV-
WENDUP (upper vertical measurement window),
LBVWSTLO, LBVWENDLO (lower measurement win-
dow) and LBHWST, LBHWEND (horizontal measure-
ment window).
A controller software and its description is available
upon request.
Fig. 2–28: Measurement Windows
zooming parameters
LBSLAA
LBELAA
LBFORMAT
LBSUBTITLE
LBTOPTITLE
Horizontal and/or
Vertical
Resizing
Controller
part
YUVin
YUVout
Measurement
Part
Y
Hardware (940x)
Software
4*
LBHWEND
4*
LBHWST
2*
LBVWENDLO
2*
LBVWSTLO
2*
LBVWENDUP
2*
LBVWSTU
P
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