User guide

System Generator for DSP User Guide www.xilinx.com 311
UG640 (v 12.2) July 23, 2010
Supporting New Boards through JTAG Hardware Co-Simulation
• FAST: A constraint that can be applied to each pin. It increases the speed of an IOB
output. FAST produces a faster output but may increase noise and power
consumption.
• Add Pin: Add a pin to the port. Note that the pin is not part of the port until this
button is selected.
Note:
Pressing 'enter' while the cursor is in the Pin LOC field is equivalent to pressing this
button.
Pin List:
• Index: (Cannot edit directly) Since a port can be more than one bit, it is represented as
a vector of pins. The index indicates which bit position a particular pin represents in
the port. Zero is the least-significant bit.
• Move Up/Down: Move the selected pin up or down in the pin list. This is useful to
correct the vector bit-ordering of the port.
• Delete Pin: Removes the selected pin from the list.
Save and Start New: Save the port to the board support package. The form will then be
cleared so that you may enter a new port.
Save and Close: Save the port to the board support package and return to the main screen.
Cancel: Discard changes to the current port and return to the main screen.
When you are finished entering a port, it will look similar to the dialog box shown below: