1.1.2 Unused Power Supply

The following figure shows how power supplies can be configured when not in use and when you need to reduce leakage and power for the system.

Figure 1-2. Option 1 for Unused Connections

The following figure shows the power configuration of unused supplies. This option can be used when there is an intent to power-up the various supplies at a later time in the system, and the I/Os are not being used.

Figure 1-3. Option 2 for Unused Connections
Important: To simplify the board-level routing, multiple 10 kΩ resistors can be used as required. The power supplies can also be grouped into a single 10 kΩ resistor and tied-off to VSS.