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本文介绍一种高性能的超大规模集成电路──可编程通用外围接口芯片PSD系列的性能、结构及其使用方法。PSD系列芯片包含单片机系统所需的各种外围接口芯片，如EPROM、SRAM、地址锁存器、输入／输出端口、可编程逻辑器件（PLD）等，它可将单片机所需的多个外围芯片集成在一个芯片内，使单片机系统降低到两个芯片：单片机和PSD系列产品。这对于经常从事单片机系统设计的专业人员来说，是值得推荐的新型器件。
This article describes a high-performance VLSI ─ ─ Programmable Universal Peripheral Interface Chip PSD series of performance, structure and use. The PSD series chip contains various kinds of peripheral interface chips such as EPROM, SRAM, address latch, input / output port and PLD which are needed by the single chip microcomputer system. It can convert multiple peripheral chips Integrated in a single chip, the microcontroller system is reduced to two chips: the microcontroller and the PSD family of products. This is a new device that is recommended for professionals who frequently work on microcontroller system design.