IJATAG
HOW TO USE EMBEDDED
INSTRUMENTS AND
IJTAG/JTAG
AN IEEE P1687 TUTORIAL
An IJTAG Tutorial
How to use embedded instruments and IJTAG/JTAG – An IEEE P1687 Tutorial
By Al Crouch
Al Crouch, Chief Technologist – Core Instruments
– at ASSET InterTech, is a Senior Member of the
IEEE. Al has served as the vice chairman of the
IEEE P1687 IJTAG working group that is developing the IJTAG standard and has contributed significantly to the hardware architecture definition. Al is the editor of the
P1838 Working Group on 3D test and debug and co-chair of the iNEMI BIST group investigation defining the use of Chip-Embedded Instruments to assist with Board Test.
2
How to use embedded instruments and IJTAG/JTAG – An IEEE P1687 Tutorial
Table of Contents
Overview ......................................................................................................................................... 4
Industry Drivers .......................................................................................................................... 4
The Synergy of Standards ........................................................................................................... 5
Who will use IEEE P1687 IJTAG? ............................................................................................ 5
The Basic P1687 On-Chip Architecture ......................................................................................... 6
The Instrument Gateway (Interface) ............................................................................................... 7
Managing 1687 scan paths with the Segment Insertion Bit (SIB) .................................................. 8
IJTAG Description Languages ....................................................................................................... 8
The IJTAG Network Building Block .............................................................................................. 9
Conclusion
INSTRUMENTS AND
IJTAG/JTAG
AN IEEE P1687 TUTORIAL
An IJTAG Tutorial
How to use embedded instruments and IJTAG/JTAG – An IEEE P1687 Tutorial
By Al Crouch
Al Crouch, Chief Technologist – Core Instruments
– at ASSET InterTech, is a Senior Member of the
IEEE. Al has served as the vice chairman of the
IEEE P1687 IJTAG working group that is developing the IJTAG standard and has contributed significantly to the hardware architecture definition. Al is the editor of the
P1838 Working Group on 3D test and debug and co-chair of the iNEMI BIST group investigation defining the use of Chip-Embedded Instruments to assist with Board Test.
2
How to use embedded instruments and IJTAG/JTAG – An IEEE P1687 Tutorial
Table of Contents
Overview ......................................................................................................................................... 4
Industry Drivers .......................................................................................................................... 4
The Synergy of Standards ........................................................................................................... 5
Who will use IEEE P1687 IJTAG? ............................................................................................ 5
The Basic P1687 On-Chip Architecture ......................................................................................... 6
The Instrument Gateway (Interface) ............................................................................................... 7
Managing 1687 scan paths with the Segment Insertion Bit (SIB) .................................................. 8
IJTAG Description Languages ....................................................................................................... 8
The IJTAG Network Building Block .............................................................................................. 9
Conclusion