簡述：
在生物辨識(shí)指紋掃描中對(duì)實(shí)時(shí)信號(hào)處理的需要使 C55x DSP 成為這一應(yīng)用的一個(gè)引入注目的解決方案。C55x 在主動(dòng)和被動(dòng)模式下的低功耗功能使其成為指紋掃描應(yīng)用的絕配，因?yàn)樵诮^大部分的時(shí)間里，處理器都處于低功耗模式。C55x DSP 的外設(shè)集成包括片上 LDO、片上存儲(chǔ)器和用于連接的 USB Phy。安裝片上外設(shè)憑借簡化電路板布局和減少芯片總數(shù)降低了系統(tǒng)總成本。當(dāng)通信外設(shè)與處理器被安裝在同一芯片上時(shí)，保護(hù)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(shè)或 ESD 的其它來源均應(yīng)受到保護(hù)。像 TPD3E001 這樣的器件可以為 USB 2.0 接口提供高達(dá) 15kV 的多通道 ESD 保護(hù)。
基本特點(diǎn)：
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(diǎn)：
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
