In the CIPS wizard, MIO or EMIO ports can be selected for I2C or PMBUS port assignments. CIPS automatically handles the connection of MIO pins and provides ports to the IP instance when the I2C or PMBUS interface is desired to connected through SelectIO pins in the PL portion of the device.
As shown in the following figure, two bidirectional package pins are required for the I2C while PMBUS has an additional output pin (SMBALERT). The SMBALERT pin provides an interrupt output and supports alert response address (ARA) functionality as defined by the PMBUS specification.
Figure 1. Connecting I2C/PMBUS to SelectIO Package Pins
