IC697CGR935系統(tǒng)硬件電路設(shè)計
整個系統(tǒng)設(shè)計構(gòu)成了一體化光學(xué)指紋識別模塊。模塊設(shè)計采用光學(xué)暗背景成像原理，加入特有活體檢測芯片，在解決干手指效應(yīng)的同時解決殘留指紋誤識別、橡膠假指紋等問題。
圖1 所示為格科微電子有限公司的光學(xué)GC0307 CMOS 圖像采集芯片應(yīng)用電路原理圖。該款CMOS 圖像采集芯片是高精度、低功耗、微體積的高性能相機(jī)的內(nèi)置式組件，它把實(shí)現(xiàn)優(yōu)質(zhì)VGA 影像的CMOS 影像傳感器與高度集成的影像處理器、嵌入式電源和高質(zhì)量的透鏡組結(jié)合在一起，輸出JPEG 圖像或圖像視頻流，支持8/10 位數(shù)字傳輸JPEG 圖像和YCbCr 接口，提供了完整的影像解決方案。
IC697CGR935 圖像采集芯功能輸出串行數(shù)據(jù)引腳、時鐘信號引腳、復(fù)位引腳、串行總線引腳等都接入到STM32F205RE的GPIO 口， 通過GPIO 口模擬時序讀取CMOS 芯片采集到的圖像信息。由于STM32F205RE 的GPIO 口工作頻率可達(dá)120 MHz，因而可以非常準(zhǔn)確高效地模擬時序，實(shí)測640×480 的原始圖像能以10 幀/s 的速度采集到主處理器STM32F205RE 中進(jìn)行圖像處理。
IC697CGR935
IC697CGR935聯(lián)系人：李先生
手機(jī)：18030229050
電話：0592-5709821
傳真：0592-5709828
QQ 1878187406
郵箱 1878187406@qq.com
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