參數(shù)資料
型號(hào): VV6444C001
廠商: 意法半導(dǎo)體
英文描述: Low Cost Digital Camera (LCDC) Chipset
中文描述: 低成本數(shù)碼相機(jī)(LCDC)芯片組
文件頁(yè)數(shù): 10/60頁(yè)
文件大?。?/td> 352K
代理商: VV6444C001
PRELIMINARY
Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
STV0680A + VV6444/6410/6500
CDSTV0680F-C
Commercial in confidence
10
T
STV0680F_contents.fm
2.
Detailed features
2.1
The sensor type is auto-detected by STV0680A, which ensures that the correct sensor timing is enabled, and the correct image
resolutions are enabled, as shown in Table 4.
Sensor type and image formats
For stills photography, ‘High’ or ‘Low’ resolution mode can be selected, to give CIF or QCIF pictures from a CIF sensor, and VGA
or QVGA from a VGA sensor (see Table 4 and Section 3.7). Reduced resolution allows for storage of more images. Images
captured in both ‘High’ and ‘Low’ resolution can be stored in camera memory at the same time. Therefore there is no need for
images stored in memory to be cleared before changing image resolution.
Where USB is connected, the host PC software (through a Video for Windows driver) can activate tethered video mode,
regardless of the user inputs to the camera buttons. In this case, the image resolution is controlled by the PC driver..
2.1.1
VV6444 is a CIF resolution, 5V CMOS imaging sensor. A brief specification is shown in Section 7. VV6444 has the same
functionality and array size as the un-microlensed VV6404 sensor, but has a microlensed array and different colour
characteristics. Although the VV64444 and VV6404 are electrically identical, the STV0680 and STV0680A use the correct
VV6444
Sensor
Sensor
Image Size
Resolution
mode
Final Image Size
Max. no. of
images
stored in
16MBit
memory
Max. no. of
images
stored in
64MBit
memory
Approximate
VfW framerate
(*)
VV6444/
6410
CIF 352 x 288
High
CIF 352 x 288
20
80
9 frames/sec
Low
QCIF 176 x 144
(Subsampled)
80
320
(see notes)
25 frames/sec
VV6500
VGA 640 x 480
High
VGA 640 x 480
(6)
26
2 frames/sec
Low
QVGA 320 x 240
(Subsampled)
(24)
106
12 frames/sec
Table 4 : Image modes supported (STV0680A-002)
*Notes:
1. VfW framerate is dependant on PC performance and USB bus loading
2. Not all image sizes are supported by all STV0680/680A variants - see Table 2 for clarification.
3. A CIF camera with STV0680A-002 and 64Mbit SDRAM can store up to 320 images by using QCIF mode. Where >99 images
are still available, the LCD display will remain at 99. Where (no. of images available) <99, the LCD display will show the
number of images available, as is the case with all other modes.
Sensor
Sensor
Image
Size
Resolution
mode
Final Image Size
Max. no. of
images
stored in
16MBit
memory
VV6444
CIF 352 x
288
High
CIF 352 x 288
20
Low
QCIF 176 x 144
(Subsampled)
80
Table 5 : Image modes supported (STV0680-001)
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