Using IEEE-1149.1 for in-circuit emulation

摘要: The author describes an in-circuit emulator based on using the IEEE-1149.1 JTAG port. This type of virtually eliminates a number problems traditional ICE by eliminating pod and necessity for removing processor from target. Simultaneously with Corelis deciding that would alleviate very common problems, semiconductor manufacturers decided to incorporate boundary-scan debugging features into their chips. As more chips, as IC packages being introduced continue have lead pitch less than or equal 0.5 mm, testing, probing, emulation will grow. replacement emulator, emulators gain acceptance, particularly developers realize physical limitations probing some newer devices preclude any other approach. >