JTAG TAP controller TDO pin

Status
Not open for further replies.
S

sunidrak

Full Member level 1
Joined
Apr 12, 2012
Messages
97
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,288
Location
Bengaluru, India
Visit site
Activity points
1,738
I am working on JTAG TAP controller in which TDO pin is a tri state . What is the advantage of Tri state TDO pin in TAP controller plz expalin I need badly
 

maybe to allow bypassing a faulty part in a JTAG chain to allow further testing comes to mind. Then you can jumper TDI to TDO of that part if it's not working correctly.
 

sunidrak said:
I am working on JTAG TAP controller in which TDO pin is a tri state . What is the advantage of Tri state TDO pin in TAP controller plz expalin I need badly
Click to expand...

You can drive multiple taps and have them share to TDO pin. You do need to be able to select one tap at a time.


John Eaton
 
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…