gdf103几个串口

根据提供的引用内容，没有找到直接关于"gdf103"的串口数量的信息。可能需要更多的上下文或信息来确定"gdf103"具体有几个串口。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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