When switching the mode of operation from EX-PD to CTS, we recommend performing ResetAll on the PGY-I3C-EX-PD unit and then switching the mode of operation to CTS. Once this is done, the user can configure 1 Prodigy Master (Controller) and 1 External Slave Device (Target) in the software and proceed to run the slave test cases for CTS. This will also ensure that there is only 1 Master and slave device present on the bus.