Furthermore digitalization can conquer some disadvantages in analog if system . there are several methods to implement dsp , such as using traditional digtial signal processors ( dsps ) . when it comes to fpga / cpld , due to its programmability , system implementation with it is flexible 数字信号处理的实现有多种方法，比如传统数字信号处理器( digitalsignalprocessors ， dsps ) ，而运用fpga cpld实现，由于可编程器件的可编程性，使得系统的实现更加灵活，可以从软件的高度来实现硬件。
When the usb device is plugged into usb port , the fs8101cssl will search and read the mp3 file from the usb device , then send the data to mp3 decoder . the user can listen to mp3 music that was stored in the usb device . with an embedded 8 bit microprocessor , the software hardware co - design architecture enhances the performance and minimizes the power consumption of the system 其中usb接口为主机提供了一个通用的即插即用接口可通过内嵌在fs7805中的硬件des 3des引擎对传送的数据进行实时的加解密操作aplif advance programmable logic interface和主从端点fifo 8位或16位数据总线接口的可编程性，大幅增加用户外接其它设备或晶片的弹性。
