EM is a simple 1 digit map format as is the Unisem format. They differ only by the parameter used to define the wafer flat location. WWF is Texas Instrument's internal format.
Start the program by double clicking on the WaferMap Convert shortcut. The main dialog should open.
Now use the drop downs to set your input format to Unisem and your output format to WWF.
Use the Input | Browse... button and navigate to the file you wish to convert. In this case, the Unisem file has the suffix .txt. However there is no guarantee that the file will always use a .txt extension.
The dialog should now look like this:
Now click on the Scan button.
A new dialog should appear:
One will see a number of parameter values that need to be filled in. While these don't affect the placement of the die, they are "required" according to the WWF specification and some value must be entered into those that are highlighted in red.
Here is what we filled in to satisfy the WWF requirements.
If we want to review or change the bin code mapping, we can then press Configuration. A new dialog will open.
Notice that for WWF output, the program has converted the bin codes used by the input map file into two digit codes that are required by WWF. If you don't like the automatic conversion you are free to change the mapped values.
Also notice that the rotation has been set to 90 degrees. This is because the input file had the flat on the left and WWF requires data be presented with the flat on the bottom. Hence a 90 degree counter-clockwise rotation transforms the data for WWF.
Click OK to save the changes and revert to the previous dialog. Then click on Convert.
The resulting WWF file looks like this:
You can review more conversion examples below: