STV0681 datasheet(13/44 Pages) STMICROELECTRONICS

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ADCS 7283313C

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STV0681

Detailed Features

2.5

PC interface options and software support

USB interface (full speed 12Mbit per second maximum) and RS232 interface (115.2kbaud) are

supported by the chipset, with driver software available from STMicroelectronics for both. The

interface type is auto-detected by the chipset. PC software can be one of the following:

Simple image upload demonstration software supplied by ST, allowing uploading of stills or

‘continuous’ images. This software should not be supplied as an end-user product.

TWAIN driver to suit all TWAIN compatible imaging applications,

Video for Microsoft Windows

™ driver for tethered video mode (USB only),

Custom end-user software developed by OEM using SDK (for SDK availability, contact ST).

The SDK is supplied by ST as a 32-bit DLL format, running on Microsoft Windows

™ 98, and

accessed through a documented software interface. This provides the basis for developing a

custom software application for uploading stills and/or video.

2.5.1

USB

Complete images (displayed as either thumbnails or in full resolution), or the entire SDRAM

contents (e.g. for uploading continuously captured image sequences, recorded using ‘Continuous

Capture’ mode) can be downloaded through USB, and USB connection also allows for tethered

video mode to be activated by the USB driver.

Thumbnail image download is extremely fast for the entire memory contents in the camera. Once a

picture is selected for download, full image download takes approximately 0.15 second per image

for a CIF image (0.6 second for a VGA image), plus post processing time per image.

For USB interface details, see

Section 4.3.

Note:

Actual USB download and post processing time also depends on PC performance and USB bus

2.5.2

RS232

Thumbnails of images, complete stored images, or the entire SDRAM contents can be downloaded

through RS232, but tethered video is not supported.

Once a picture is selected for download, full image download takes approximately 10 seconds per

image for a CIF image (around 30 seconds for a VGA image), plus post processing time per image

(of the order of 1 second approximately).

For RS232 interface details, see

Section 4.4.

Note:

Actual post processing time after RS232 download also depends on PC performance

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