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介绍最新一代可编程单片机外围器件PSD4135G2的性能特点及其接口编程技术,结合PSD4135G2在电参量数据采集系统中的应用实例,说明了PSD的硬件和软件设计方法。在设计中,需把CPU的数据/地址总线和控制线与PSD芯片正确连接,然后通过软件包PSDsoft进行PSD引脚配置和地址空间分配,最后把配置信息以系统内编程(ISP)方式下载到PSD芯片中。实践证明,采用PSD设计数据采集系统,可大幅度地简化CPU外围电路、降低装置成本、增强系统可靠性,与常规设计方法比较,具有较大的优越性。
This paper introduces the performance characteristics and interface programming of the latest generation of programmable peripherals PSD4135G2. Combined with the practical application of PSD4135G2 in the electrical parameter data acquisition system, the PSD hardware and software design methods are described. In the design, the data / address bus and control line of the CPU need to be correctly connected with the PSD chip, then the PSD pin of the software package PSDsoft is used to allocate the PSD pin and the address space, and then the configuration information is downloaded to in-system programming (ISP) PSD chip. Practice has proved that using PSD design data acquisition system, can greatly simplify the CPU peripheral circuits, reduce device costs and enhance system reliability, compared with the conventional design method, with greater advantages.