本文件已被宣布为“稳定”，不再接受货币定期审查。用户负责验证参考资料和持续适用性或技术要求。新技术可能存在。本节定义了本文件的范围，简要介绍了Pi总线的历史，讨论了Pi总线的主要功能，并概述了Pi总线的操作。本文件是AS4710 Pi总线标准的配套手册。本文件的目的是提供信息，以帮助Pi总线的用户，无论他们是Pi总线控制器的实施者，还是考虑将Pi总线用作背板通信总线的系统架构师。本文件还提供了许多Pi的基本原理- AS4710中定义的总线要求以及Pi总线正在考虑的潜在增强讨论。

This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist.This section defines the scope of the document, provides a brief history of the Pi-Bus, discusses key features of the Pi-Bus, and provides an overview of the operation of the Pi-Bus.This document is a handbook intended to accompany AS4710 Pi-Bus standard. The purpose of this document is to provide information to aid users of the Pi-Bus, whether they be implementors of Pi-Bus controllers, architects of systems considering using the Pi-Bus as the backplane communications bus. This document also provides rationale for many of the Pi-Bus requirements as defined in AS4710 and a discussion of potential enhancements that are being considered for the Pi-Bus.