基于ISA总线的PIO控制卡设计

Design of PIO control card based on ISA-Bus

介绍了基于ISA总线的PIO控制卡的硬件电路和软件设计,并给出了详细的设计方案。通过使用VHDL语言设计出逻辑控制电路,下载至PIO控制卡的CPLD芯片中,实现逻辑控制功能。射频仿真系统中的校准计算机通过ISA总线对PIO卡进行读写,达到控制校准接收机内部微波开关的目的。文章最后给出了该PIO卡的仿真波形和测试结果。

This paper describes the hardware and software design of PIO control card which is based on ISA-Bus, and gives a detailed design. The Design uses VHDL. The logic control circuit is downloaded to the CPLD PIO controller chip, which can realize the logic control functions. In RFSS, the RF-Calibration computer reads and writes the PIO card through the ISA bus, in order to control microwave switches inside the calibration receiver. Finally, gives the simulation waveforms and test results of the PIO card.