什么是SGPIO？

Serial General Purpose Input Output (SGPIO) is a method to serialize general purpose IO signals. SGPIO defines the communication between an initiator (e.g. a host bus adapter) and a target (e.g. a backplaneholding disk drives).

The target typically converts the output signals into multiple parallel LED signals and
provides the input signals from general purpose inputs.
Both the initiator and the target may be composed of one or multiple chips. If multiple chips are used, they shall coordinate driving the bus signals to maintain compliance with this standard.
Figure 1 depicts the SGPIO bus.

简单说就是

串行通用输入输出（SGPIO）是一种将通用IO信号串行化的方法。SGPIO定义了发起者（例如主机总线适配器）和目标（例如持有磁盘驱动器的背板）之间的通信。

目标通常将输出信号转换为多个并行LED信号，并提供来自通用输入的输入信号。

简单单个应用

单个应用