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STV-681-M01 bảng dữ liệu(PDF) 6 Page - STMicroelectronics |
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STV-681-M01 bảng dữ liệu(HTML) 6 Page - STMicroelectronics |
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6 / 44 page  Introduction STV0681 6/44 ADCS 7283313C 1.1.6 “Delete Last” function An additional user interface function is available in STV0681 with either audio record or playback hardware fitted. With these, the user can delete the last image or continuous clip to be captured, or the last audio memo to be recorded. The standard “Clear all” (“CL”) function remains, whether or not audio hardware is fitted. 1.1.7 Backward compatibility with STV0680B STV0681 is electrically and functionally compatible with cameras designed for STV0680B, and uses the same PC/Mac drivers, however the change of device pinout means that some PCB re-design will be required. Precise design guidelines are available from ST as a reference design (see Chapter 10). A software development kit (SDK) for PC is available from ST to interface to the camera and provide the basis to develop a custom software application for stills and/or video. It includes colour processing software. 1.2 Key system features The key features of a typical camera based on the STV0681 chipset are listed here below. 1.2.1 Image features q Support for CIF resolution sensor - 352 x 288 pixels q Support for VGA resolution sensor - 640 x 480 pixels q 80 picture storage capacity possible for CIF, with 64MB memory q 26 picture storage capacity for VGA, with 64MBit memory q A greater number of images can be stored when ‘Low’ resolution mode is enabled (e.g. 80 QCIF images with 16Mbit memory, 107 QVGA images with 64Mbit memory). See Table 1. q Automatic anti-flicker exposure and gain control q Support for flashgun. Figure 1: Typical camera system block diagram CMOS Sensor Sensor data STV0681 USB interface 16MBit or 64MBit SDRAM Lens + RS232 I/F USB I/F memory I/F RS232 interface GPIO Sensor I/F PWM LED 4.5 - 6v Battery e.g. 12MHz XTAL Audio DAC LCD Driver 2x 7 seg. LCD Push Transceiver Piezo “Mode” Buzzer “Shutter 4-5v (Nominal) supply from Battery or USB 3-4 x AA, AAA, etc. Power Management Circuit (Discretes) Detect Low Battery to PC to PC Circuit (Discretes) Sensor clock IR Filter VV6501 (VGA) VV6411 (CIF) Image Array Audio Pre-Amp Speaker Microphone Comparator Buttons: /Record” OEM Flashgun Enable/Trigger Module Audio Enable/Trigger Flashgun Amplifier VReg 3v3 supply Subject |
Số phần tương tự - STV-681-M01 |
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Mô tả tương tự - STV-681-M01 |
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