3.2 GUI Connection, Device Detection, and Host/Client Verification

The GUI displays detected devices in the device list and allows each module to be selected and configured individually. For complete register and PMBus command descriptions, refer to the MCPF1525M06 data sheet.

Use the following procedure to power the dual-module reference design, connect the GUI interface, and verify that both MCPF1525M06 devices are detected for individual monitoring and configuration. The Host/Client roles are defined by the hardware PS configuration.

1. Connect a nominal 12V input supply to the reference design board and power the board.
2. Ensure that the bias VCC is active. In this reference design, VCC is selected using J1, either from U1_VCC or from an external VCC source.
3. Connect the MCP2221A Breakout Module to the board telemetry header J4 to enable I²C/PMBus communication with the two MCPF1525M06 modules.
4. Open the MCPF1525M06 GUI. If the devices are not detected automatically, click Scan. The GUI shows the detected devices in the device list.

5. The U1 Host device is normally detected automatically, and its I²C/PMBus addresses are loaded in the GUI device view, as shown in Figure 3-1.

   Confirm the following Host addresses:

   • U1 I²C Address: 0x10
   • U1 PMBus™ Address: 0x70

   

   

6. As observed in Figure 3-2, in the present GUI version, the Client address may not be loaded automatically in the Client device view. The GUI may detect that two devices are present, but the Client register values may not be readable until the Client address is manually assigned.

   To enable Client access:

   • Right-click the Client device entry in the GUI device list
   • Set the Client I²C address to 0x12
   • Set the Client PMBus address to 0x72

   After this address update, the GUI can read the Client registers and allows monitoring and configuration of the Client module as illustrated in Figure 3-3.

   

7. Select each detected module individually in the GUI before reading or writing configuration registers.