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JTAG（边界扫描）
JTAG（联合测试行动小组）最初是对半导体器件和PC电路板进行标准化测试的组织的名称。它也指本组织确定的标准本身。
JTAG（边界扫描）测试将检查半导体器件引脚与安装器件的PC电路板安装面的连接。器件的每个引脚都有一个JTAG寄存器，用于存储引脚数据。寄存器是串行拼接的，数据由一个特殊的引脚输出，由一个测试时钟同步。特定的数据可以写入寄存器。此方案允许检查器件引脚和PC板之间的连接。
产品线
采用JTAG的微控制器产品如下。
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