Set voltage scaling by using the following steps:

1. Go to Program Files and click on the TPS56X20 I2C TEST PANEL Application. The TPS56X20 I2C TEST PANEL will load as shown in Figure 3-2.
   Figure 3-2 TPS56X20 I2C TEST PANEL
2. As a first step before sending a V_OUT command, click the write command On the EXT Power Settings block as shown in Figure 3-3.
   Figure 3-3 EXT Power Settings
3. Go to the VOUTS control block and click on the ALL VOUTS control, illustrated in Figure 3-4. The drop down menu gives an option to select different VOUT.
   Figure 3-4 ALL VOUTS Control
4. Select a particular value and click on WRITE VOUT switch.

Observe that the Voltage at TP6 relative to TP7 is changed to the programmed VOUT value.