Slave Register Group Register Descriptions Registers associated with slave interfaces. Offset: 0x42000 32-bit Slave Register Descriptions Registers associated with the 32-bit AXI slave interface. These registers are only active when the FPGA2HPS AXI Bridge is configured with a 32-bit FPGA AXI slave interface. 128-bit Slave Register Descriptions Registers associated with the 128-bit AXI slave interface. These registers are only active when the FPGA2HPS AXI Bridge is configured with a 128-bit FPGA AXI slave interface.