I2C SCL pin

R2026b

Serial clock pin number

Since R2023a

Model Configuration Pane: Hardware Implementation / Hardware board settings / Target hardware resources / I2C properties

Description

Set the serial clock pin number of the Arduino^® board to which the I2C peripheral device is connected. This table lists the Arduino boards that support configuring the SCL pins for I2C modules 0 and 1.

Settings

22 | 0-5 | 12-19 | 21 | 23 | 25-27 | 32-36 | 39 | 5 | 1 | 9 | 13 | 17 | 21 | 27 | 3 | 7 | 11 | 15 | 19

Supported Arduino Boards	I2C Module 0	I2C Module 1
ESP32–S3 series (Arduino compatible) ESP32–WROOM (Arduino compatible) ESP32–WROVER (Arduino compatible)	22 (default), 0-5, 12-19, 21, 23, 25-27, 32-36, 39	NA
Raspberry Pi® Pico (Arduino Compatible) Raspberry Pi Pico W (Arduino Compatible)	5 (default), 1, 9, 13, 17, 21	27 (default), 3, 7, 11, 15, 19

For every I2C module, you can individually configure the bus speed, SDA and SCL pins. However, not all Arduino boards support configuring I2C module 0 and module 1. This table lists the I2C modules supported by different Arduino boards.

Arduino Boards	Supported I2C Modules
Arduino Due Teensy 4.0 (Arduino Compatible) Teensy 4.1 (Arduino Compatible) Raspberry Pi Pico (Arduino Compatible) Raspberry Pi Pico W (Arduino Compatible)	I2C0, I2C1
Arduino Leonardo Arduino MKR WiFi 1010 Arduino MKR 1000 Arduino MKR Zero Arduino Mega 2560 Arduino Mega ADK Arduino Micro Arduino Nano 3.0 Arduino Nano 33 BLE Sense Arduino Nano 33 IoT Arduino Nano RP2040 Connect Arduino Robot Control Board Arduino Robot Motor Board Arduino Uno Arduino Nano R4 Arduino Uno R4 Minima Arduino Uno R4 Arduino Uno R4 WiFi ESP32–S3 series (Arduino compatible) ESP32–WROOM (Arduino compatible) ESP32–WROVER (Arduino compatible) ESP32–S3 series (Arduino compatible)	I2C0

Programmatic Use

No programmatic use is available.

Version History

Introduced in R2023a