簡述：
在生物辨識指紋掃描中對實時信號處理的需要使 C55x DSP 成為這一應用的一個引入注目的解決方案。C55x 在主動和被動模式下的低功耗功能使其成為指紋掃描應用的絕配，因為在絕大部分的時間里，處理器都處于低功耗模式。C55x DSP 的外設集成包括片上 LDO、片上存儲器和用于連接的 USB Phy。安裝片上外設憑借簡化電路板布局和減少芯片總數降低了系統總成本。當通信外設與處理器被安裝在同一芯片上時，保護您的器件免受 ESD 的來源的傷害也很重要。可以與人體接觸的所有 IO 或通信外設或 ESD 的其它來源均應受到保護。像 TPD3E001 這樣的器件可以為 USB 2.0 接口提供高達 15kV 的多通道 ESD 保護。
基本特點：
High-Performance, Low-Power, TMS320C55x™
• Device USB Port With Integrated 2.0
Fixed-Point Digital Signal Processor High-Speed PHY that Supports:
16.67-, 13.33-, 10-, 8.33-ns Instruction Cycle
USB 2.0 Full- and High-Speed DeviceTime
60-, 75-, 100-, 120-MHz Clock Rate
Tightly-Coupled FFT Hardware Accelerator
One/Two Instruction(s) Executed per Cycle
• LCD Bridge With Asynchronous Interface
• 10-Bit 4-Input Successive Approximation (SAR)
– Dual Multipliers [Up to 200 or 240 Million ADC
Multiply-Accumulates per Second (MMACS)] • Real-Time Clock (RTC) With Crystal Input, With
– Two Arithmetic/Logic Units (ALUs) Separate Clock Domain and Power Supply
– Three Internal Data/Operand Read Buses • Four Core Isolated Power Supply Domains:
and Two Internal Data/Operand Write Buses Analog, RTC, CPU and Peripherals, and USB
– Software-Compatible With C55x Devices • Four I/O Isolated Power Supply Domains: RTC
– Industrial Temperature Devices Available I/O, EMIF I/O, USB PHY, and DVDDIO
方案特點：
The EVM comes with a full complement of on-board devices that suit a wide
variety of application environments. Key features include:
• A Texas Instruments TMS320C5515 DSP operating up to 100 Mhz.
• 128 Mbytes of Mobile SDRAM
• 16 Megabytes of NOR Flash
• 64 Megabytes of NAND Flash
• 128 x 128 bit mapped color LCD display TPS65023 Power Management IC for individual C5515 power rail control
• TLV320AIC3204 stereo codec with line in, line out, headphone, mic in, on board microphones
• MMC / SD Media Card Connector
• User USB 2.0 port via C5515
• I2C EEPROM (256Kbits) and SPI EEPROM (256Kbits)
• Expansion connectors for Blue Tooth interface
• RS-232 Interface
• External JTAG emulation interface
• Embedded JTAG controller
• 10 User push button switches
• INA219 power measurement devices
• Optional battery power
參考原理圖：
參考pcb圖
