Mentor v8.6_4 ユーザーズマニュアル
Command Dictionary
Set Net Dominance
FastScan and FlexTest Reference Manual, V8.6_4
2-529
Set Net Dominance
Tools Supported: FastScan and FlexTest
Scope: Setup mode
Usage
SET NEt Dominance Wire | And | Or
Description
Specifies the fault effect of bus contention on tri-state nets.
The Set Net Dominance command specifies the fault effect of bus contention on
tri-state nets. This provides the capability to detect some faults on tri-state driver
enable lines when those drivers connect to a tri-state bus. These faults would be
ATPG untestable unless the tool can use the Z-state for detection.
tri-state nets. This provides the capability to detect some faults on tri-state driver
enable lines when those drivers connect to a tri-state bus. These faults would be
ATPG untestable unless the tool can use the Z-state for detection.
When using FastScan, the Wire behavior is the same where any different binary
value results in an X-state.
value results in an X-state.
The truth tables for each type of bus contention fault effect are given in Tables
, and
Table 2-6. WIRE Bus Contention Truth Table
X
0
1
Z
X
X
X
X
X
0
X
0
X
0
1
X
X
1
1
Z
X
0
1
Z
Table 2-7. AND Bus Contention Truth Table
X
0
1
Z
X
X
0
X
X
0
0
0
0
0
1
X
0
1
1
Z
X
0
1
Z