Hacking Hardware
Protocols
Protocols
  • Welcome!
  • I2C - Inter Integrated Circuit
    • Basics
    • Master
    • Slave
    • Videos
  • SPI
    • Page 2
  • JTAG
    • Page 8
  • UART
    • Page 1
  • CAN
    • Page 5
  • ELM
    • Page 4
  • PPM
    • Page 3
  • RS-232
    • Page 4
  • *-Wire
    • Page 6
  • HiZ
    • Page 6
  • KEYB
    • Page 7
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  1. I2C - Inter Integrated Circuit

Basics

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Last updated 3 years ago

Created by Philips Semiconductor in 1982

No licence needed since 2006.

Bi directional communication - Half Duplex

VDD - Power line

SDA - Data line

SCL - Clock line

GND - Ground

I2C Mode
Speed

Standard Mode

100 kbps

Fast Mode

400 kbps

Fast Mode Plus

1 Mbps

High Speed Mode

3.4 Mbps

Ultra-Fast Mode

5 Mbps

i23C Bus