1.1.3 Unused Power Supply

Figure 1-3 shows how power supplies may be configured when not in use and also to reduce leakage and power for the system.

Figure 1-3. Option 1 for unused Connections

Figure 1-4 also 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 1-4. Option 2 for Unused Connections
Important: To simplify the board-level routing, multiple 10 kΩ resistors can be used as required or the power supplies can also be grouped into a single 10 kΩ resistor and tied-off to VSS.