Hardware terminal reference
Reference only — circuit simulation and export are unavailable.
Draft content and translations: fluent educator review pending.
Arduino UNO R3 · A000066
Definition revision: arduino-uno-r3-a000066@1
Markers follow the original connector centers. Select a terminal for its label; labels and shape distinguish pins without relying on color. Rotating this reference does not change connectivity.
Selected terminal: A0 · connector0
Digital input and output · Analog input · Internal pull-up · Logic domain: 5 V
Internally connected contacts: No permanent internal connection
UNO R3 A000066: D0/RX and D1/TX, ICSP headers, reset, AREF, VIN and N/C are reserved in this teaching profile. SDA/SCL header contacts are connected to A4/A5. No firmware adapter is implemented.
Source drawing / photograph · Fritzing / althaus · CC BY-SA 3.0 · CC BY-SA 3.0
Arduino UNO R3 · A000066 pinout
All terminals (44)
- A0 · connector0 — Digital input and output · Analog input · Internal pull-up
- A1 · connector1 — Digital input and output · Analog input · Internal pull-up
- A2 · connector2 — Digital input and output · Analog input · Internal pull-up
- A3 · connector3 — Digital input and output · Analog input · Internal pull-up
- A4/SDA · connector4 — Digital input and output · Analog input · Internal pull-up
- A5/SCL · connector5 — Digital input and output · Analog input · Internal pull-up
- ICSP MISO · connector39 — Reserved / unavailable
- 5V · connector40 — Power supply
- ICSP SCK · connector41 — Reserved / unavailable
- ICSP MOSI · connector42 — Reserved / unavailable
- RESET · connector43 — Reserved / unavailable
- GND · connector44 — Ground / return
- ICSP2 MISO · connector45 — Reserved / unavailable
- 5V · connector46 — Power supply
- ICSP2 SCK · connector47 — Reserved / unavailable
- ICSP2 MOSI · connector48 — Reserved / unavailable
- RESET2 · connector49 — Reserved / unavailable
- GND · connector50 — Ground / return
- D8 · connector51 — Digital input and output · Internal pull-up
- D9 PWM · connector52 — Digital input and output · Internal pull-up · PWM output
- D10 PWM/SS · connector53 — Digital input and output · Internal pull-up · PWM output
- D11 PWM/MOSI · connector54 — Digital input and output · Internal pull-up · PWM output
- D12/MISO · connector55 — Digital input and output · Internal pull-up
- D13/SCK · connector56 — Digital input and output · Internal pull-up
- GND · connector57 — Ground / return
- AREF · connector58 — Reserved / unavailable
- A4/SDA · connector59 — Reserved / unavailable
- A5/SCL · connector60 — Reserved / unavailable
- D0/RX · connector61 — Reserved / unavailable
- D1/TX · connector62 — Reserved / unavailable
- D2 · connector63 — Digital input and output · Internal pull-up
- D3 PWM · connector64 — Digital input and output · Internal pull-up · PWM output
- D4 · connector65 — Digital input and output · Internal pull-up
- D5 PWM · connector66 — Digital input and output · Internal pull-up · PWM output
- D6 PWM · connector67 — Digital input and output · Internal pull-up · PWM output
- D7 · connector68 — Digital input and output · Internal pull-up
- IOREF · connector84 — Power supply
- RESET · connector85 — Reserved / unavailable
- 3V3 · connector86 — Power supply
- 5V · connector87 — Power supply
- GND · connector88 — Ground / return
- GND · connector89 — Ground / return
- VIN · connector90 — Reserved / unavailable
- N/C · connector91 — Reserved / unavailable