What is the function of leakage I/O ?

[sajjaudaykumar]

I would like to get some info or document about leakage i/o as I have no clue about the functionality. There are control pins on it and I need to configure them for DFT mode. I see some pull and pull down resistors on them. Why do we have to use leakage I/o instead of normal ones.

Appreciate your input on this matter. Thank you.

 

[rca]

Re: leakage i/o

during DFT, on my design, I disabled the pull resistor, to avoid slow pad reaction. It's better for transition patterns. In the same idea, the direction is force during the scan mode.

 

[sajjaudaykumar]

Re: leakage i/o

during DFT, on my design, I disabled the pull resistor, to avoid slow pad reaction. It's better for transition patterns. In the same idea, the direction is force during the scan mode.

Hi RCA,
Thanks for the reply. I will do the same. But what purpose does this leakage I/O and the pull up and pull down's on them serve?