Data Sheet

3/8/2018 Digital Discovery Reference Manual [Reference.Digilentinc]
https://reference.digilentinc.com/reference/instrumentation/digital-discovery/reference-manual 13/25
(https://reference.digilentinc.com/_detail/digital_discovery/dd_3diouserconnectors.png?id=reference%3Ainstrumentation%3Adigital-
discovery%3Areference-manual)
Figure 3. DIO user connectors. []
(https://reference.digilentinc.com/_detail/digital_discovery/dd_4ioleveltranslator.png?id=reference%3Ainstrumentation%3Adigital-
discovery%3Areference-manual)
Figure 4. I/O level translator. []
The LDO in Figure 5 generates the 4.3V to supply the level translator in Figure 4.
The charge-pump in Figure 6 provides the the 6V reference for the clipper in Figure 7.
When all ESD diodes protecting DIO_USR in Figure 3 are OFF, Q3B is OFF, and also Q4. If overvoltage is applied on some DIO_USR
pins, rising VU5V2_ESD in Figure 7 above 5.2V, Q3B and Q4 turn ON , clipping VU5V2_ESD at approximately 5V.
(https://reference.digilentinc.com/_detail/digital_discovery/dd_5vccioswsupply.png?id=reference%3Ainstrumentation%3Adigital-
discovery%3Areference-manual)
Figure 5. VCCIO_SW supply. []