I2C serial bus decoding - overview The I2C (Inter-Integrated Circuit) bus is a low-speed serial data protocol commonly used to transfer data between components and modules within a single device. Developed in the early 1980s by Philips Semiconductors (now NXP), I2C employs 2 signal wires to transfer “packets” of information between one or more “master” devices such as microcontrollers, and multiple “slave” devices such as sensors, memory chips, ADC and DACs. The PicoScope software enables I2C packets to be fully decoded both in a table format, and in a color-keyed trace time-aligned with the data signal. More information on I²C - serial protocol decoding >>