1. Invoking Fastscan
2. Adding the Clocks
3. Identifying the Scan Circuitry
4. Generating the Test Patterns
5. Viewing and Saving the Results

1. Fastscan requires a test library to identify the functions of all the parts in the design. Cut and paste the test library given at the bottom of this page into a text editor and save it as atglib.

Make sure that you save it in the same directory that your design netlist is in.
2. Set the mentor graphics working directory variable to the directory that your design netlist and test library are in. Make sure you are in the directory that your design netlist is in and enter the following shell command:


shell> MGC_WD=`pwd`
Note: apostrophies are surrounding the pwd and not single quotes.

3. To invoke Fastscan from the shell prompt, enter:


shell> fastscan {design_name} -v -verilog {library_name}

For this example, enter:

shell> fastscan ud_counter_fs.v -verilog -lib atglib
 

After the command has completed execution, you should see the graphical interface shown below in Figure 1.


 

model anotb (OUT, B, A) (

input(B) ()

input(A) ()

intern(_NN0) (function = !A;)

output(OUT) (function = B * _NN0 ;)

)

input(B) ()

input(A) ()

intern(_NN0) (function = !A;)

intern(_NN4) (function = B * _NN0 ;)

output(OUT) (function = !_NN4;)

)

input(DATA) ()

input(CLOCK) ()

intern(_NN0) (function = !CLOCK;)

output(Q) (primitive=_dff(,,_NN0,DATA,Q,);)

output(QBAR) (function = !Q;)

)

scan_definition(
type = mux_scan;

scan_out = Q;

scan_in = DATA1 ;

scan_enable = SCAN;

non_scan_model = dff(QBAR, Q, DATA, CLOCK);)

input(SCAN) ()

input(DATA1) ()

input(DATA) ()

input(CLOCK) ()

intern(_NN7) (primitive=_mux(DATA,DATA1,SCAN,_NN7);)

intern(_NN0)

(function = !CLOCK;)

output(Q) (primitive=_dff(,,_NN0,_NN7,Q,);)

output(QBAR) (function = !Q;)

)

input(RESET) ()

input(DATA) ()

input(CLOCK) ()

intern(_NN1) (function = !CLOCK;)

intern(_NN0) (function = !RESET;)

output(Q) (primitive=_dff(,_NN0,_NN1,DATA,Q,);)

output(QBAR) (function = !Q;)

)

scan_definition(
type = mux_scan;

scan_out = Q;

scan_in = DATA1 ;

scan_enable = SCAN;

non_scan_model = dffr(RESET, QBAR, Q, DATA, CLOCK);)

input(SCAN) ()

input(RESET) ()

input(DATA1) ()

input(DATA) ()

input(CLOCK) ()

intern(_NN9) (primitive=_mux(DATA,DATA1,SCAN,_NN9);) i

intern(_NN1) (function = !CLOCK;)

intern(_NN0) (function = !RESET;)

output(Q) (primitive=_dff(,_NN0,_NN1,_NN9,Q,);)

output(QBAR) (function = !Q;)

)

input(SET) ()

input(RESET) ()

input(DATA) ()

'input(CLOCK) ()

intern(_NN2) (function = !CLOCK;)

intern(_NN1) (function = !RESET;)

intern(_NN0) (function = !SET;)

output(Q) (primitive=_dff(_NN0,_NN1,_NN2,DATA,Q,);)

output(QBAR) (function = !Q;)

)

input(SET) ()

input(SCAN) ()

input(RESET) ()

input(DATA1) ()

input(DATA0) ()

input(CLOCK) ()

intern(_NN11) (primitive=_mux(DATA0,DATA1,SCAN,_NN11);)

intern(_NN2) (function = !CLOCK;)

intern(_NN1) (function = !RESET;)

intern(_NN0) (function = !SET;)

output(Q) (primitive=_dff(_NN0,_NN1,_NN2,_NN11,Q,);)

output(QBAR) (function = !Q;)

)

input(IN1) ()

output(OUT) (function = !IN1;)

)

input(IN2) ()

input(IN1) ()

intern(_NN3) (function = IN1 * IN2 ;)

output(OUT) (function = !_NN3;)

)

input(IN4) ()

input(IN3) ()

input(IN2) ()

input(IN1) ()

intern(_NN5) (function = IN1 * IN2 * IN3 * IN4 ;)

output(OUT) (function = !_NN5;)

)

input(IN2) ()

input(IN1) ()

output(OUT2) (function = IN1 * IN2 ;)

output(OUT1) (function = !OUT2;)

)

input(IN3) ()

input(IN2) ()

input(IN1) ()

intern(_NN0) (function = IN1 + IN2 + IN3 ;)

output(OUT) (function = !_NN0;)

)

input(IN2) ()

input(IN1) ()

output(OUT) (primitive=_xor(IN1,IN2,OUT);)

)