The DCI_CASCADE constraint links two or more adjacent I/O banks together for DCI reference voltage purposes. The I/O bank with the DCI reference voltage is the master, and all other I/O banks in the cascade are slaves. All banks in a cascade must be in the same I/O column of the device.
- In the Device Constraints window, select DCI
Cascade from the drop-down list at the top of the window.
- Select the I/O banks you want to cascade, right-click, and select Add DCI Cascade.
- In the Add DCI Cascade dialog box, select an I/O bank to be the master of the
new DCI cascade, and click OK.
The master bank appears in the Device Constraints window.Note: DCI cascades must have a master and at least one slave I/O bank.Tip: Alternatively, you can create a DCI_CASCADE constraint in the Package window or Package Pins window. Right-click the banks to cascade, and select Create a DCI Cascade.