Pololu-Romi-32U4-Carte-Broches
 | Page(s) en cours de traduction/élaboration. Page(s) under translation/construction |
Assignation des broches
The table below lists the most important pin assignments for the ATmega32U4 on the Romi 32U4 Control Board. This table is helpful if you want to add your own electronics to the Romi 32U4, write your own low-level code for interfacing with the hardware, or just want to understand better how the Romi 32U4 works. Each row represents a physical pin on the ATmega32U4.
The “ATmega32U4 pin name” column shows the official name of the pin according to the fiche technique de l' ATmega32U4.
The “Arduino pin names” column lists the names provided by the Arduino environment for the pin. These names can generally be used as arguments to any function that takes a pin number. However, there are some exceptions. For example, passing the number 4 to analogRead actually reads pin A4, not pin 4. Also, due to hardware limitations, some functions only work on a limited set of pins.
The “Romi 32U4 functions” column documents what the pin is used for on the Romi 32U4 Control Board. Many pins can serve multiple purposes concurrently by switching modes. For example, PB0 can read the state of button C when it is an input, and it can control the red LED and serve as an LCD data line when it is an output.
The “Note/alternate functions” column documents other features of the pin, although some of those features might be impractical to use.
| ATmega32U4 pin name | Arduino pin names | Romi 32U4 Control Board functions | Notes/alternate functions |
| PB7 | 11 | LCD control line (E) | Timer0 PWM output A (OC0A)
Timer1 PWM output C (OC1C) UART flow control (RTS) |
| Pin-change interrupt (PCINT7) | |||
| PD4 | 4, A6, 24 | LCD control line (RS) | Analog input (ADC8) |
| Timer1 input capture pin (ICP1) | |||
| PB3 | 14, MISO | User pushbutton A | |
| LCD data line DB4 | SPI Master Input/Slave Output (MISO) | ||
| Pin-change interrupt (PCINT3) | |||
| ISP programming line (PDO) | |||
| PB0 | 17, LED_BUILTIN_RX, SS | Red LED (RX) | |
| User pushbutton C | |||
| LCD data line DB5 | SPI slave select (SS) | ||
| Pin-change interrupt (PCINT0) | |||
| PC7 | 13, LED_BUILTIN | Yellow LED | |
| LCD data line DB6 | Timer4 PWM output A (OC4A) | ||
| Timer3 input capture pin (ICP3) | |||
| Divided system clock output (CLKO) | |||
| PD5 | 30, LED_BUILTIN_TX | Green LED (TX) | |
| User pushbutton B | |||
| LCD data line DB7 | UART external clock (XCK1) | ||
| UART flow control (CTS) | |||
| PD7 | 6, A7, 25 | Buzzer PWM | Analog input (ADC10) |
| Timer4 PWM output D (OC4D) | |||
| Timer0 counter source (T0) | |||
| PF6 | A1, 19 | Battery level input (VIN/3) | Analog input (ADC6) |
| JTAG test data out (TDO) | |||
| PB6 | 10, A10, 28 | Left Motor PWM | Analog input (ADC13) |
| Timer1 PWM output B (OC1B) | |||
| Timer4 PWM output B (OC4B) | |||
| Pin-change interrupt (PCINT6) | |||
| PB2 | 16, MOSI | Left motor direction | SPI Master Output/Slave Input (MOSI) |
| Pin-change interrupt (PCINT2) | |||
| ISP programming line (PDI) | |||
| PB5 | 9, A9, 27 | Right motor PWM | Analog input (ADC12) |
| Timer1 PWM output A (OC1A) | |||
| Timer4 PWM output B (OC4B) | |||
| Pin-change interrupt (PCINT5) | |||
| PB1 | 15, SCK | Right motor direction | SPI Clock (SCK) |
| Pin-change interrupt (PCINT1) | |||
| ISP programming line (SCK) | |||
| PB4 | 8, A8, 26 | Left encoder XORed input | Analog input (ADC11) |
| Pin-change interrupt (PCINT4) | |||
| PE2 | - | Left encoder input | Hardware bootloader select (HWB) |
| PE6 | 7 | Right encoder XORed input | Analog comparator negative input (AIN0) |
| External interrupt source (INT6) | |||
| PF0 | A5, 23 | Right encoder input | Analog input (ADC0) |
| PD0 | 3, SCL | I²C clock for Raspberry Pi communication and inertial sensors | Timer0 PWM output B (OC0B) |
| External interrupt source (INT0) | |||
| PD1 | 2, SDA | I²C data for Raspberry Pi communication and inertial sensors | External interrupt source (INT1) |
| PD2 | 0 | Free I/O | UART receive pin (RXD1) |
| External interrupt source (INT2) | |||
| PD3 | 1 | Free I/O | UART transmit pin (TXD1) |
| External interrupt source (INT3) | |||
| PC6 | 5 | Free I/O | Timer3 PWM output A (OC3A) |
| Timer4 PWM output A (OC4A) | |||
| PD6 | 12, A11, 29 | Free I/O | Analog input (ADC9) |
| Timer4 PWM output D (OC4D) | |||
| Timer1 counter source (T1) | |||
| PF7 | A0, 18 | Free I/O | Analog input (ADC7) |
| JTAG test data in (TDI) | |||
| PF5 | A2, 20 | Free I/O | Analog input (ADC5) |
| JTAG test mode select (TMS) | |||
| PF4 | A3, 21 | Free I/O | Analog input (ADC4) |
| JTAG test clock (TCK) | |||
| PF1 | A4, 22 | Free I/O | Analog input (ADC1) |
| RESET | - | Reset pushbutton | internally pulled high, active low |
| AREF | - | - | Analog reference |
Basé sur "Guide utilisateur de la carte de contrôle Romi 32U4" de Pololu (https://www.pololu.com/docs/0J69) - Traduit en Français par shop.mchobby.be CC-BY-SA pour la traduction
Toute copie doit contenir ce crédit, lien vers cette page et la section "crédit de traduction". Traduit avec l'autorisation expresse de Pololu (www.pololu.com)
Based on "Pololu Romi 32U4 Control Board User’s Guide" from Pololu (https://www.pololu.com/docs/0J69) - Translated to French by shop.mchobby.be CC-BY-SA for the translation
Copies must includes this credit, link to this page and the section "crédit de traduction" (translation credit). Translated with the Pololu's authorization (www.pololu.com)