Is tristates presence in the design decreases fault coverage

Status
Not open for further replies.
P

pavankumarmnnit

Junior Member level 2
Joined
Oct 16, 2008
Messages
22
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,549
I am having design which requires tristates (for blocking) in certain conditions.i am getting fault coverage of 93.48(%) for my design by using Tetramax ATPG tool.

Tristates were properly driven with single instances.I heard that the asynchronous pins of tristates are not properly controllable.Is it the reason which is reducing fault coverage in my design
 

you will have to make tristate bbuffer transparent when in DFT mode .. same like your internal reset and clock .. try that and see if coverage is increased .. also it depends how many tri states you have and where exactl they are seating in chip ..
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…