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STV0680A-002 bảng dữ liệu(PDF) 10 Page - STMicroelectronics |
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10 / 60 page PRELIMINARY Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000 STV0680A + VV6444/6410/6500 CDSTV0680F-C Commercial in confidence 10 STV0680F_contents.fm 2. Detailed features 2.1 Sensor type and image formats 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 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 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) |
Số phần tương tự - STV0680A-002 |
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Mô tả tương tự - STV0680A-002 |
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