22.214.171.124. SDM I/O Pins for Power Management and SmartVID
Intel recommends that you use LTC3888 or LTM4677 to regulate the PMBus. The LTM4677 device is the default setting for the Device > Device and Pin Options > Power Management & VID > Slave device type parameter. Select a regulator you use on your board. If you are using a different PMBus regulator, change the default setting from LTM4677 to Other.
Refer to the Intel® Stratix® 10 Power Management User Guide for more information about the pin assignments and PMBus setting.