STV-DCA/VGA-E01 STMICROELECTRONICS [STMicroelectronics], STV-DCA/VGA-E01 Datasheet - Page 10

• Manufacturer Part Number: STV-DCA/VGA-E01
• Description: Low Cost Digital Camera (LCDC) Chipset
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
*Notes:
2.
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.
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
STV0680F_contents.fm
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
Sensor
VV6444/
VV6500
6410
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.
Detailed features
Sensor type and image formats
VV6444
VGA 640 x 480
CIF 352 x 288
Image Size
Sensor
Sensor
VV6444
Resolution
Table 4 : Image modes supported ( STV0680A-002 )
Table 5 : Image modes supported ( STV0680-001 )
mode
CIF 352 x
Sensor
High
High
Image
Low
Low
Size
288
Final Image Size
Commercial in confidence
Resolution
QVGA 320 x 240
QCIF 176 x 144
VGA 640 x 480
CIF 352 x 288
(Subsampled)
(Subsampled)
mode
High
Low
CDSTV0680F-C
PRELIMINARY
Final Image Size
QCIF 176 x 144
CIF 352 x 288
(Subsampled)
Max. no. of
stored in
memory
images
16MBit
(24)
(6)
20
80
Max. no. of
STV0680A + VV6444/6410/6500
Max. no. of
(see notes)
stored in
memory
stored in
memory
images
64MBit
images
16MBit
320
106
80
26
80
20
VfW framerate
Approximate
25 frames/sec
12 frames/sec
9 frames/sec
2 frames/sec
(*)
10