4.9.3.3. Arduino Power
There are several power rails on the Arduino connectors.
IOREF: 3.3 V for digital IOs. It must be 3.3 V. 5 V is forbidden as it may damage devices on the board.
VCC_3.3V: 3.3 V power generated by the Cyclone® 10 LP FPGA Evaluation Board.
VCC_5V_AR1/2: 5 V power from the Cyclone® 10 LP FPGA Evaluation Board.
ARDUINO_AREF: Reserved analog reference voltage. Care must be taken that the range can be 0 ~3.3 V. 5 V is forbidden.
When using Arduino connector, USB may not provide sufficient power so we suggest you use external adapter connector (J12) to power up the board.
Arduino UNO* R3 did not specify limitation of output current capability. The following table shows the maximum output current for the Cyclone® 10 LP FPGA Evaluation Board.
| Power Rail | Output Pin Location | Maximum Current | Note |
|---|---|---|---|
VCC_5V_AR1 VCC_5V_AR2 |
J4.5 J18.2 |
0.5 A | 5 V output capability to Arduino Shield, shared with VCC_5V (depends on the power adapter specification) |
| VCC_3.3V | J4.4 | 0.05 A | VCC_3.3V output capability to Arduino Shield |
| IOREF | J4.2 | 0.05 A | Connected to VCC_3.3V |