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I/O pads and bi directional pads

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carv_13

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bidirectional io pads

Can someone point me a tutorial as to how to use different types of IO pads and bidirectional pads in scan insertion?.

Thanks,
Aravind
 

lakshman.ar

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wrt to the bi-dir pads, a mux has to be used to select between the i/p and the o/p ports

the select signal of the mux had to be "TEST ENABLE" signal so that when TEST EN = 1, then the the port as to act as an "input port" and the scan data has to enter the chip !!

i do not have ne material on this, but have worked on BI-DIR ports and scan insertion ... this is what i have done !!

need more help . lemme kno !

WBR
Lakshman
 

carv_13

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Does not using only the enable signal lead to a loss in test coverage of some combinational logic circuit in the design and that using the test mode signal along with the enable signal improves test coverage?. I am looking for some pictorial representation of IO and bidi pads to understand them better.

-Aravind
 

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