Altera FPGA配置芯片 EPCS系列芯片ALTIUM原理图库+PCB封装库（AD集成库） Library Component Count : 6 Name Description ---------------------------------------------------------------------------------------------------- EPCS16SI16N EPCS16 Series, In-system programmable 3.3V serial configuration device, 16-Pin SOIC, 16-Megabit, Industrial Grade, Pb-Free EPCS1SI8 EPCS1 Series, In-system programmable 3.3V serial configuration device, 8-Pin SOIC, 1-Megabit, Industrial Grade EPCS1SI8N EPCS1 Series, In-system programmable 3.3V serial configuration device, 8-Pin SOIC, 1-Megabit, Industrial Grade, Pb-Free EPCS4SI8 EPCS4 Series, In-system programmable 3.3V serial configuration device, 8-Pin SOIC, 4-Megabit, Industrial Grade EPCS4SI8N EPCS4 Series, In-system programmable 3.3V serial configuration device, 8-Pin SOIC, 4-Megabit, Industrial Grade, Pb-Free EPCS64SI16N EPCS64 Series, In-system programmable 3.3V serial configuration device, 16-Pin SOIC, 64-Megabit, Industrial Grade, Pb-Free

多种应用环境中不允许使用JTAG下载器升级可编程器件的程序，要求通过设备对外的通信接口实现可编程器件的在线升级，对于XILINX公司的FPGA芯片及其配置芯片，提出了一种基于USB接口的程序在线升级方法。该USB2.0接口是扩展在FPGA上用于与上位机进行通讯的接口，通过与上位机软件配合，对FPGA配置芯片进行擦除和编程烧写，实现FPGA程序的在线升级。本文给出了该方法的升级原理和方法。

详细画出了FPGA配置芯片EPCS16及AS_JTAG接口电路图，电路图直接可用