Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Internal & External path violation fixing

Status
Not open for further replies.

syed_dawood

Newbie level 4
Joined
Oct 19, 2012
Messages
7
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,333
Hi All ,

I have internal and external violations in my design . By Internal I mean Reg to reg paths, By external I mean " Input pin to reg " and " reg to output pin " .
How to I go about fixing them ?? Should I remove my internal and external setup violations first and then fix hold ? Or should I fix both seupt and hold internally and then go to external violations ???

Thanks
 

zjushmily

Newbie level 5
Joined
Nov 9, 2007
Messages
10
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,283
Activity points
1,326
Hi All ,

I have internal and external violations in my design . By Internal I mean Reg to reg paths, By external I mean " Input pin to reg " and " reg to output pin " .
How to I go about fixing them ?? Should I remove my internal and external setup violations first and then fix hold ? Or should I fix both seupt and hold internally and then go to external violations ???

Thanks
I think you'd better fix R2R setup timing , then fix all hold timing for R2R , IO path.
Finally, you'd better clear all hold, if setup spec can not meet, you can slow down the clock frequency to meet.
 

rca

Advanced Member level 4
Joined
May 20, 2010
Messages
1,485
Helped
354
Reputation
708
Reaction score
326
Trophy points
1,363
Location
Marin
Activity points
8,522
For input to reg or reg to output violations, you should know if you have any timing constraint for this I/O.
If not, you could relax the I/O to/from reg timing.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top