Hi all,
How's everybody doing?
I would like to poll everybody's experience in the testing of boundary scan using the 3070 generated boundary scan tests.
Do you need to have any special fixture requirements?
What are they? What issue does it solve? Is it effective?
A couple of examples that I know of includes:
1) needing to have a ground plane added to the probe plate to reduce ground bounce
2) needing to use a dual-stage fixture to reduce noise
What else ... ?
Tell me what you use or tried.
How's everybody doing?
I would like to poll everybody's experience in the testing of boundary scan using the 3070 generated boundary scan tests.
Do you need to have any special fixture requirements?
What are they? What issue does it solve? Is it effective?
A couple of examples that I know of includes:
1) needing to have a ground plane added to the probe plate to reduce ground bounce
2) needing to use a dual-stage fixture to reduce noise
What else ... ?
Tell me what you use or tried.
- If the board is not aligned with the IEEE1149.1 standard to ensure fail-safe operation: TMS=1, TDI=1, TRST*=1, TCK=0; coul be adapted in the ICT fixt.
- These TAP signals must be marked as a critical.
- Use a dual-stage fixture to prevent noise when there are differents BScan chains in the board.
Rgards,
Jose