STV0680B-001 STMicroelectronics, STV0680B-001 Datasheet - Page 10

• Manufacturer Part Number: STV0680B-001
• Description: DUAL-MODE DIGITAL CAMERA CHIPSET
• Manufacturer: STMicroelectronics

Detailed features
2
2.1
Note:
Note: 1 VfW framerate is dependent on PC performance and USB bus loading
10/63
2 On a camera using STV0680B-003, the number of images which can be stored is reduced if Audio
When tethered VfW video (PC) or Quicktime driver (Mac) is activated, all images or recorded
sounds have been recorded on the camera or if custom sounds have been downloaded from the
PC to the camera. The reduction of capacity depends on the length of audio clip, but a rough guide
is that if 1 CIF image uses the same amount of SDRAM as 10sec of audio, and one VGA image
uses the same amount of SDRAM as 30 sec. of audio.
Detailed features
Sensor type and image formats
The sensor type is auto-detected by STV0680B, which ensures that the correct sensor timing is
enabled, and the correct image resolutions are enabled, as shown in
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
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.
sounds or video clips will be deleted from the camera SDRAM. A software solution is available
(“Camera control”, as part of the SDK for PC, and “Plug’n Save” for Mac) which can monitor
whether a camera is connected and will warn the user if activating the VfW driver will cause SDRAM
contents to be deleted.
Sensor
VV6444
VV6410/
6411
VV6500
CIF 352 x 288
CIF 352 x 288
VGA 640 x 480
Image Size
Sensor
Table 3 : Image modes supported (STV0680B-001)
Resolution
mode
High
High
High
Low
Low
Low
Final Image Size
QVGA 320 x 240
QCIF 176 x 144
QCIF 176 x 144
VGA 640 x 480
Version 3.4
CIF 352 x 288
(Subsampled)
CIF 352 x 288
(Subsampled)
(Subsampled)
Max. no. of
stored in
memory
(
images
16MBit
Note 2
(26)
(6)
20
80
20
80
STV0680B + VV6444/6410/6500
Table 3
)
Table 3
Max. no. of
). Reduced resolution allows
(see
(see
(see
stored in
memory
(
images
64MBit
Note 2
322
322
107
80
Note 3
80
Note 3
26
Note 3
.
)
)
)
)
VfW framerate
22.5 frames/sec.
Approximate
15 frames/sec.
25 frames/sec.
15 frames/sec.
12 frames/sec.
2 frames/sec.
(
Note 1
)