Mentor v8.6_4 User Manual
Command Dictionary
Delete LFSRs
FastScan and FlexTest Reference Manual, V8.6_4
2-181
Delete LFSRs
Tools Supported: FastScan
Scope: Setup mode
Prerequisites: You must define LFSRs with the Add LFSRs command before you
can delete them.
Usage
DELete LFsrs lfsr_name... | -All
Description
Removes the specified Linear Feedback Shift Registers (LFSRs).
The Delete LFSRs command deletes LFSRs defined with the Add LFSRs
command. You can use the Report LFSRs command to display a list of the current
LFSRs with their current values and tap positions. When you delete an LFSR, the
tool also deletes all its taps and pin connections.
command. You can use the Report LFSRs command to display a list of the current
LFSRs with their current values and tap positions. When you delete an LFSR, the
tool also deletes all its taps and pin connections.
You use this command primarily for simulating Built-In Self Test (BIST)
circuitry.
circuitry.
Arguments
•
lfsr_name
A repeatable string that specifies the reference names of the LFSRs which you
want to remove.
want to remove.
•
-All
A switch that deletes all defined LFSRs.
Examples
The following example changes the definition of an LFSR by deleting it and then
re-adding it with a new definition:
re-adding it with a new definition:
add lfsrs lfsr1 prpg 5 15 -serial -in
add lfsrs lfsr2 prpg 5 13 -serial -in
add lfsrs lfsr3 prpg 5 11 -parallel -out
delete lfsrs lfsr3
add lfsrs lfsr3 prpg 5 11 -parallel -in
add lfsrs lfsr2 prpg 5 13 -serial -in
add lfsrs lfsr3 prpg 5 11 -parallel -out
delete lfsrs lfsr3
add lfsrs lfsr3 prpg 5 11 -parallel -in