Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics 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.

regarding modes and corners

Status
Not open for further replies.

venkatramanan

Member level 4
Joined
Sep 24, 2011
Messages
69
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Location
bangalore
Activity points
1,685
what is function of this following modes briefly:
1.scan shift mode
2.scan capture mode
3.rambist mode
4.funtional mode
5.test mode.

ple any one explain me......if any document upload .thanks in advance :)
 

Functional mode is the one in which the chip normally operates, or is required to operate i nits end application.

rambist is built in self test for memories, to make sure memory is working properly and doesn't have junk data in the output.

Scan modes are for testing the flops in the design through scan chains. I guess capture and shift are derivatives of if the flop is able to hold the value and pass on the same at the clock edge.

Experts please correct me if I'm wrong.
 
Scan modes are not just for testing the flops, it is testing whether the design ( both sequential and combinational) is manufactured as intended. During manufacturing process, there is so much process variation and manufacturing defects. These defects may cause electrical faults like shorts to power/ground and others which can be represented as logical fault of stuck at 0 and stuck at 1. These faults may modify the original intended logic and cause chip to malfunction. During Scan shift mode, you shift the scan patterns ( which helps in determining faults) into the chip ,and during scan capture mode, you capture the combinational logic output to scannable flops and compare the value with expected value. If it doesn't match we know there is a fault in the chip.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top