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| S2-3 | S2-4 | 3.3V (VCC) Pin 5 | VIO Pin 6 | Description |
|---|---|---|---|---|
| OFF | OFF | 3.3V from base | VIO from base | 3.3V (pin 5) and VIO (pin 6) sourced from base |
| OFF | ON | 3.3V from USB | VIO from base | VIO sourced from base by Pin 6 |
| ON | OFF | 3.3V from base | 3.3V from base | VIO sourced by Pin 5 6 and drive Pin 65 |
| ON | ON | 3.3V from USB | 3.3V from USB | 3.3V (pin 5) and VIO (pin 6) sourced by USB and drive Pin 6USB no need to supply voltage from base |
Table 8: DIP-switch S2 power setting description.
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Following diagram shows how the settings of the DIP-switches S2-2 3 and S2-4 determines the configuration of the on-board voltages:
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