Not to be confused with. I²C Type Production history Designer, known today as Designed 1982; 36 years ago ( 1982) Data Data signal Width data line (SDA) + clock line (SCL) Bitrate 0.1 / 0.4 / 1.0 / 3.4 / 5.0 (depending on mode) Protocol, I²C ( Inter-Integrated Circuit), pronounced I-squared-C, is a,,, invented in 1982 by (now ). It is widely used for attaching lower-speed peripheral to processors and in short-distance, intra-board communication. Alternatively I²C is spelled I2C (pronounced I-two-C) or IIC (pronounced I-I-C). Since October 10, 2006, no licensing fees are required to implement the I²C protocol. However, fees are required to obtain I²C slave addresses allocated by NXP. Several competitors, such as Siemens AG (later Infineon Technologies AG, now Intel mobile communications), NEC, Texas Instruments, STMicroelectronics (formerly SGS-Thomson), Motorola (later Freescale, now merged with NXP), Nordic Semiconductor and Intersil, have introduced compatible I²C products to the market since the mid-1990s., defined by Intel in 1995, is a subset of I²C, defining a stricter usage.

Driver Lettore Smart Card Ez100pu Smart. Arduino - Wire. This library allows you to communicate with I2. C / TWI devices. On the Arduino boards with the R3 layout (1. SDA (data line) and SCL (clock line) are. Arduino developers can use the 'Wire' library. Maximite supports I²C communications natively as part of its. (Two-Wire Interface) or TWSI (Two-Wire Serial.

One purpose of SMBus is to promote robustness and interoperability. Accordingly, modern I²C systems incorporate some policies and rules from SMBus, sometimes supporting both I²C and SMBus, requiring only minimal reconfiguration either by commanding or output pin use. 24C08: Serial with I²C bus I²C is appropriate for peripherals where simplicity and low manufacturing cost are more important than speed. Common applications of the I²C bus are: • Describing connectable devices via small ROM configuration tables to enable ' operation, such as • (SPD) EEPROMs on (DIMMs), and • (EDID) for monitors via, and connectors. • System management for PC systems via; • SMBus pins are allocated in both and connectors. • Accessing and chips that keep user settings.

• Accessing low-speed and. • Changing contrast, hue, and color balance settings in monitors (via ). • Changing sound volume in intelligent speakers. • Controlling small (e.g. ) or displays.

• Reading hardware monitors and diagnostic sensors, like a CPU thermistor [ ] or fan speed. • Turning on and turning off the power supply of system components. A particular strength of I²C is the capability of a to control a network of device chips with just two pins and software.

Many other bus technologies used in similar applications, such as, require more pins and signals to connect multiple devices. Revisions [ ] The history of I²C specification releases: • In 1982, the original 100 kHz I²C system was created as a simple internal bus system for building control electronics with various Philips chips. • In 1992, Version 1 added 400 kHz Fast-mode (Fm) and a 10-bit addressing mode to increase capacity to 1008 nodes. This was the first standardized version. • In 1998, Version 2 added 3.4 MHz High-speed mode (Hs) with power-saving requirements for electric voltage and current.

• In 2000, Version 2.1 clarified version 2, without significant functional changes. • In 2007, Version 3 added 1 MHz Fast-mode plus (Fm+) (using 20 mA drivers), and a device ID mechanism.

Eclipse Birt Runtime Install. • In 2012, Version 4 added 5 MHz Ultra Fast-mode (UFm) for new USDA (data) and USCL (clock) lines using logic without, and added an assigned manufacturer ID table. It is only a bus. • In 2012, Version 5 corrected mistakes.

• In 2014, Version 6 corrected two graphs. This is the most recent standard. An example schematic with one master (a ), three slave nodes (an, a, and a microcontroller), and R p I²C uses only two bidirectional lines, Serial Data Line (SDA) and Serial Clock Line (SCL), with.