Can the TNT5002 be put in Bypass Mode during Boundary Scan Testing

[azstreak]

We use Boundary Scan Testing (BST) to test our PCB assemblies and seem to have found issues with how the TNT5002 during this testing. One solution would be to put the TNT5002 in Bypass Mode during BST. Does the TNT5002 go into Bypass Mode reliably?

[Karl_Miles]

I work for Goepel, a Boundry Scan vendor (www.goepel.co.uk).

If you mean JTAG or Boundary Scan "Bypass" then this should be set within your Boundary Scan tools.

Note if you you put it in bypass then the device will operate as normal, the Boundary Scan is bypassing it. This may not be what you want.

The device does not support highz, which would tristate it's pins.

That said, looking at the BSDL file

http://digital.ni.com/public.nsf/allkb/0F2BA1786753193486256DE500829881

There are only a few output only pins, so by putting it in EXTEST, you can define majority of pins as input and set the output pins to a level you are happy with.

All that said, your Boundary Scan tools should really be handling this all automatically and you should have a stable test.

What exact issues are you seeing?

Where are you based?