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8. AVR Pin Assignment Table Sorted by Pin
| Port | Pin | Orangutan Function | Notes/Alternate Functions |
|---|---|---|---|
B |
PB0 | digital I/O | Timer1 input capture (ICP1) divided system clock output (CLK0) |
| PB1 | digital I/O | Timer1 PWM output A (OC1A) | |
| PB2 | digital I/O | Timer1 PWM output B (OC1B) | |
| PB3 | M2 control line | Timer2 PWM output A (OC2A) ISP programming line | |
| PB4 | digital I/O | Caution: also an ISP programming line | |
| PB5 | digital I/O | Caution: also an ISP programming line | |
| PB6 | 20 MHz resonator input | not accessable to the user | |
| PB7 | 20 MHz resonator input | not accessable to the user | |
C |
PC0 | analog input and digital I/O | ADC input channel 0 (ADC0) |
| PC1 | analog input and digital I/O | ADC input channel 1 (ADC1) | |
| PC2 | analog input and digital I/O | ADC input channel 2 (ADC2) | |
| PC3 | analog input and digital I/O | ADC input channel 3 (ADC3) | |
| PC4 | analog input and digital I/O | ADC input channel 4 (ADC4) I2C/TWI input/output data line (SDA) | |
| PC5 | analog input and digital I/O | ADC input channel 5 (ADC5) I2C/TWI clock line (SCL) | |
| PC6 | RESET pin | internally pulled high; active lowdigital I/O disabled by default | |
D |
PD0 | digital I/O | USART input pin (RXD) |
| PD1 | digital I/O | connected to red user LED (high turns LED on) USART output pin (TXD) | |
| PD2 | digital I/O | external interrupt 0 (INT0) | |
| PD3 | M2 control line | Timer2 PWM output B (OC2B) | |
| PD4 | digital I/O | USART external clock input/output (XCK) Timer0 external counter (T0) | |
| PD5 | M1 control line | Timer0 PWM output B (OC0B) | |
| PD6 | M1 control line | Timer0 PWM output A (OC0A) | |
| PD7 | digital I/O | ||
ADC6 | dedicated analog input | ADC input channel 6 (ADC6) | |
ADC7 | dedicated analog input | connected to user trimmer potentiometer ADC input channel 7 (ADC7) | |
This pin assignment table, combined with a pinout diagram, is also available as a downloadable pdf: Baby Orangutan B pinout and pin assignment table (285k pdf).
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