To change the IO voltage for Bank46 on the ZU3EG variant of the iW-G36M SOM, kindly refer the section “Voltage setting on HD Bank” from the software user guide.
This customization needs to be implemented in the FSBL.
Kindly note that changing the FSBL configuration for LDO7 to 3.3V will set the IO voltage of both Bank 43 and Bank 46 to 3.3V, since the same LDO7 is used for both banks. This is explained in the section “Voltage setting on HD bank” from the software user guide.
For further inquiries, please get in touch with mktg@iwave-global.com
Please find the detailed G36M product information in the below link,