SOC——JTAG (IEEE 1149.1标准)介绍
目录:
IEEE 1149.1 introduction
TAP Controller
Instruction Register
Test Data Register
Boundary Scan Cell
Boundary Scan Description Language (BSDL)
1. IEEE 1149.1 introduction
出发点:管脚的焊接问题,测试芯片之间的logic, 判断位置连接等 —>JTAG(joint Test Action Group)
定义了一些接口,TDI TCK TMS TDO TRST*
Test Acess Port (TAP)
TAP Controller
IR
Test Data Register—Basically Bundary scan register