IC693PWR328
IC693PWR328
嵌入式指紋采集系統(tǒng)組成
具有提示信息的指紋識別裝置包括處理器，系統(tǒng)結(jié)構(gòu)圖如圖1 所示。處理器以不同的接口分別連接LCD 漢字顯示屏、指紋傳感器、JTAG 調(diào)試接口、復(fù)位電路、外部SRAM 數(shù)據(jù)存儲(chǔ)器、串口及USB 接口；電源管理模塊為上述各部分中的芯片和電路提供電源管理。其中，漢字顯示屏用來顯示指紋圖像初始評估的結(jié)果，提示用戶手指的放置是否正確、若不正確如何修正；指紋傳感器用來獲取手指的指紋圖像信息；JTAG 調(diào)試接口用來與上位機(jī)連接進(jìn)行調(diào)試；復(fù)位電路用來初始化指紋識別裝置；FLASH 程序存儲(chǔ)器用來存儲(chǔ)指紋識別裝置運(yùn)行的程序；外部SRAM 數(shù)據(jù)存儲(chǔ)器用來存儲(chǔ)指紋識別裝置運(yùn)行過程中產(chǎn)生的臨時(shí)數(shù)據(jù)；串口和USB 接口用于與上位機(jī)的連接通信；安全控制器是指紋識別裝置的核心，控制指紋識別裝置的運(yùn)行。
圖1 指紋采集系統(tǒng)結(jié)構(gòu)圖
指紋專用芯片，是指內(nèi)嵌指紋識別技術(shù)的芯片產(chǎn)品，能夠片上實(shí)現(xiàn)指紋的圖像采集、特征提取、特征比對的芯片，使開發(fā)過程變得簡單，開發(fā)者可以方便的實(shí)現(xiàn)指紋識別的功能，同時(shí)芯片價(jià)格適中，利于普及使用。
IC693PWR328
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