參數(shù)資料
型號: VS6724
廠商: 意法半導體
英文描述: 2 Megapixel single-chip camera module
中文描述: 兩百萬像素的單芯片相機模塊
文件頁數(shù): 29/118頁
文件大?。?/td> 1200K
代理商: VS6724
VS6724
Functional description
29/118
2.9.2
Line / frame blanking data
The values which are output during line and frame blanking are an alternating pattern of
0x10 and 0x80 by default. These values may be changed by writing to the BlankData_MSB
and BlankData_LSB registers in the
Dither control
bank.
2.9.3
YCbCr 4:2:2 data format
YCbCr 422 data format requires 4 bytes of data to represent 2 adjacent pixels. ITU601-656
defines the order of the Y, Cb and Cr components as shown in
Figure 13
.
Figure 13.
Standard Y Cb Cr data order
The VS6724 bYCbCrSetup register can be programmed to change the order of the
components as follows:
Figure 14. Y Cb Cr data swapping options register bYCbCrSetup
2.9.4
YCbCr 4:0:0
The ITU protocol allows the encapsulation of various data formats over the link. The
following data formats are also proposed encapsulated in ITU601-656 protocol:
YCbCr 4:0:0 - luminance data channel
This is done as described in
Figure 15
. In this output mode the output data per pixel is a
single byte. Therefore the output PCLK and data rate is halved.
It is possible to reverse the overall bit order of the component through a register
programming.
0
0
0
0
X
Y
EAV Code
F
F
START OF DIGITAL ACTIVE LINE
HSYNC SIGNAL
8
0
1
0
Cb
Cr
Y
Y
Cb
Cr
Y
Y
Cb
Cr
Y
Y
4-data
packet
Y
C
1
0
1
1
0
1
0
0
Cb
Cr
Y
Y
in 4-byte data packet
2nd
Components order
1st
3rd
4th
Cb
Y
Cr
Y
Cb
Cr
Y
Y
Cb
Y
Cr
Y
DEFAULT
B
B
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