The test mechanism of mixed - signal circuit based on boundary - scan architecture , and the functional requirement of test system are analyzed. The performance of the test system implemented meets with requirements of IEEE 1149.4 STD.

• 分析了混合信号边界扫描测试的工作机制对测试系统的功能需求；实现了符合IEEE1149.；4标准的混合信号边界扫描测试系统。