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

Want know some tips about gated clock

Status
Not open for further replies.

Ansunamu

Advanced Member level 4
Joined
Oct 19, 2001
Messages
115
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,296
Activity points
845
I am trying to design a MCU with gated clock to save the power . I have no idea about how to write the script to synthesis my chip

Because the AND or NAND gate used to gate the clock has a long delay but it not make sense since the clock tree has not been created .

The Clock tree will be created by P&R tool and the delay of these gate used to gate the clock should be short . I already tried to run the postlayout simulation and the delay of the gate is what i expected .

I am wondering that i must can write the good synthesis script to generate a right SDF file

Does anyone have any idea about that ?
 

philewar

Member level 4
Joined
Mar 17, 2002
Messages
72
Helped
3
Reputation
6
Reaction score
3
Trophy points
1,288
Location
Shanghai
Activity points
489
I think checking DC's manual will help a lot.
 

sandusty

Member level 5
Joined
Apr 19, 2004
Messages
89
Helped
3
Reputation
6
Reaction score
1
Trophy points
1,288
Activity points
910
put don't touch on your high fanout nets (for example, clocks). Run pre-sim with modified sdf (from pt or dc). You have nothing to do on the synthesis scripts for the pre-sim sdf.

Let the Backend tools generated the clock tree(s) for you, and than got the more precise SDF for the post-sim.
 

maniasonic

Member level 1
Joined
Jan 8, 2004
Messages
34
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,288
Activity points
238
if you have PowerCompiler you can have it done much more easily.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top