简述：

在生物辨识指纹扫描中对实时信号处理的需要使 C55x DSP 成为这一应用的一个引入注目的解决方案。C55x 在主动和被动模式下的低功耗功能使其成为指纹扫描应用的绝配，因为在绝大部分的时间里，处理器都处于低功耗模式。C55x DSP 的外设集成包括片上 LDO、片上存储器和用于连接的 USB Phy。安装片上外设凭借简化电路板布局和减少芯片总数降低了系统总成本。当通信外设与处理器被安装在同一芯片上时，保护您的器件免受 ESD 的来源的伤害也很重要。可以与人体接触的所有 IO 或通信外设或 ESD 的其它来源均应受到保护。像 TPD3E001 这样的器件可以为 USB 2.0 接口提供高达 15kV 的多通道 ESD 保护。

基本特点：

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

方案特点：

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

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参考pcb图