For the Si5332, QFN-32 package, GPI inputs (INPUT1-5), is an external pull-up resistor required on these pins if they are unused or can they be left floating on the PWB?
You can use a switch or button connected to a GPI to recall a snapshot of blocks in your system. When the external switch or button is pushed, the block’s settings are returned to the pre-defined state. For example, you could use an external button to switch a Selector block to a certain input. To do this, first set the Selector block to the desired state. Then drag the signal processing block into the appropriate GPI. This action takes a snapshot of the signal processing block and saves it to the GPI programming. The GPI should be in digital mode to invoke a signal processing block, so set the mode button to digital.