Step 3: Disable XDC Files - Step 3: Disable XDC Files - 2026.1 English

As in Project Mode, if an IP delivers XDC constraints, the system automatically processes and adds them to the in-memory design. For this design, you disable the XDC files included with the Clock Wizard IP. You apply constraints from the top-level XDC file instead. The Clock Wizard IP has not had the output products generated yet. First, you need to generate the output products, which include the XDC files.

When generating the output products for an included XCI file IP, decide whether to use an out-of-context flow, which includes creating a synthesis Design Checkpoint (DCP). Alternatively, choose to let the IP be synthesized as part of the top-level design.

Because you want to disable the use of an XDC for the Clocking wizard, you need to configure the IP accordingly. Consequently, you also need to ensure that the IP does not use a DCP.

Add the following to your script to configure the IP to not use a Synthesis Design Checkpoint:
```
set_property generate_synth_checkpoint false [get_files clk_wiz_0.xci]
```
Now when synthesis completes at the top level, the system uses the RTL output products, and it does not expect a DCP. Unlike in a Project Flow, you must manually create output products, as they are not automatically generated as needed.
Add the generate_target command to your Tcl script:
```
generate_target all [get_ips clk_wiz_0]
```
XCI file from the source IP repository into a local directory, the system writes the output products to the local directory.
Tip: To find out what output products an IP supports, use either the report_property command on the IP, or get_property to get the KNOWN_TARGETS property from the IP. For example, do not add these to your script:
```
report_property [get_ips clk_wiz_0]
get_property KNOWN_TARGETS [get_ips clk_wiz_0]
```
You can generate multiple output products by passing a list to the command, such as {synthesis instantiation_template}.

To disable the XDC files delivered with the Clock Wizard, you need the names of the files. You can query the XDC file(s) that are delivered with an IP, by using the get_files command with the -of_objects and -filter options.
To capture the XDC file names of the Clock Wizard IP in a Tcl variable, add the following lines to your script:
```
set clk_wiz_xdc [get_files -of_objects \
[get_files clk_wiz_0.xci] -filter {FILE_TYPE == XDC}]
```
This returns the names of the XDC files delivered with the Clock Wizard.
To disable the XDC files, add this line to your script as well:
```
set_property is_enabled false [get_files $clk_wiz_xdc]
```
Your script disables the XDC files delivered with clk_wiz IP.

To check what XDC files are evaluated and in what order, use the report_compile_order command with the -constraints option.

Step 3: Disable XDC Files - Step 3: Disable XDC Files - 2026.1 English - UG939

Vivado Design Suite Tutorial: Designing with IP (UG939)