1869 - Platform Manager 2: How do you reset the I2C interface on Power Manager II devices?
It is not necessary to explicitly reset a Power Manager II's I2C interface. Because the I2C interface in this product family is a slave device, it will always be responsive to the SCL and SDA control signals generated by an I2C master. For example, if an external I2C master is reading data back from an ispPAC-POWR1220 (a case where the latter has control over SDA), and it becomes necessary to terminate the transaction before it is done, the master can signal a STOP, which will force the ispPAC-POWR1220 into an idle state.
Additionally, because Power Manager II family devices are designed to work in SMBus systems, they also have a ~30ms timeout on I2C/SMBus transactions, so if the transaction is held up for longer than this, the I2C interface resets itself.