The CLK104 RF clock add-on card can be programmed and controlled by the RFCLK driver implemented in the Linux/baremetal application of the APU on the ZCU216 evaluation board. This excludes the external programming dongle. An example demonstrating how the RFCLK driver can control the CLK104 is provided in the Zynq® UltraScale+™ RFSoC RF data converter evaluation tool (see Zynq UltraScale+ RFSoC ZCU208 and ZCU216 RF Data Converter Evaluation Tool User Guide (UG1433)). The example code with a simple application that controls the CLK104 is available at: https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/board_common/src/rfclk.