Yes, PL DDR4 pinouts are available in IO_constraints.xdc.
iG-G35M SOM supports PS DDR4 from dedicated PS Pins and PL DDR4 from the PL IOs.
For further product inquiries, please get in touch with our sales team at mktg@iwave-global.com
Please find the detailed product information here:
Zynq™ UltraScale+™ ZU19/ZU17/ZU11 MPSoC System on Module