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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 6 and drive Pin 5 |
| ON | ON | 3.3V from USB* | 3.3V from USB* | 3.3V (pin 5) and VIO (pin 6) sourced USBno need to supply voltage from base |
Table 8: DIP-switch S2 power setting description. *Attention: don't supply voltage from base if pin sourced from USB!
User Push Button
The user push button S1 directly connected to the SC CPLD manipulates pin G of the pin header J2 by driving it to GND.
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