可用于ALTERA 的CPLD和AVR 单片机的并口下载器的电路原理图和PCB图（PROTEL DXP）,经实验可直接使用。,ALTERA the CPLD can be used and the AVR MCU' s parallel port to download schematic and PCB circuit diagram, can be directly used by the experiment.

无线射频芯片nRF905和单片机AVR、CPLD的扩展的SPI接口的基站控制系统的VHDL语言的程序-Radio frequency chip nRF905 and SCM AVR, CPLD SPI interface, the expansion of the base station control system of the VHDL language program

使用AVR单片机+cpld的控制方式，实现步进电机加减速和步进电机位置控制(Using AVR microcontroller +cpld control method to achieve stepper motor acceleration and deceleration and stepper motor position control)