One is to replace the devices with the JTAG-compatible devices, the other is to set boundary-scan cells on the PCB board, which is relatively complicated and is fully explained.

• 器件置换法和边界扫描单元置入法,重点分析了相对复杂的边界扫描单元置入法,并讨论了对于边界扫描总线的两种控制方式。