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I2C: Design, Operating system support & Popular cable systems

I2C (Inter-Integrated Circuit; pronounced as "eye-squared-see" or "eye-two-see"), alternatively known as I2C and IIC, is a synchronous, multi-master/multi-slave, single-ended, serial communication bus invented in 1980 by Philips Semiconductors (now NXP Semiconductors). It is widely used for attaching lower-speed peripheral integrated circuits (ICs) to…

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I2C topic overview

The analysis highlights Design, Operating system support and Popular cable systems as prominent areas in the source structure around I2C. 1 topic appears in more than one source area, which can help identify connections that are less obvious in a linear reading.

Related topics
138
Source areas
7
Connected nodes
146
Extracted relationships
250
Concept neighborhoods
23
Bridge connections
146

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Design · 42 topics
Overview · 36 topics
Operating system support · 29 topics
Popular cable systems · 14 topics
Derivative technologies · 11 topics
Development tools · 5 topics
Limitations · 2 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Bitrate
0.1, 0.4, 1.0, 3.4 or 5.0 Mbit/s depending on mode
Data signal
Open-collector or open-drain
Designed
1980; 46 years ago (1980)
Designer
Philips Semiconductors (now NXP Semiconductors)
Protocol
Serial, half-duplex
SCL
Clock Pin

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Design

Operating system support

Development tools

Popular cable systems

Limitations

  • SPD Serial Presence Detect
  • I3C I3C (bus)

Derivative technologies

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How I2C connects Entity context

The extracted context around I2C shows recurring relationship patterns in the source. For example, I2C → AmigaOS, API, Arduino, As, ChibiOS/RT, CircuitPython, For HID, FreeBSD, Hundreds, In AmigaOS, In Linux, In Mac OS, In Microsoft Windows, In NetBSD, In RISC OS, In Windows CE, In Zephyr OS, IO, IoT, I²C Another extracted example is I2C → A2005, Adafruit, DFRobot, Digilent, FPGA, GND, GNDBreakout Garden, GNDUEXT, GPIO/interrupt, GPIO/reset, Interface, JST PH, JST SH, Molex SL, Olimex, On, Pimoroni, PWM, Qwiic, Raspberry Pi. Use these groups to spot repeated connection types before inspecting the individual relationships.

I2C

Top relations

related to Operating system support · 46
I2C → AmigaOS, API, Arduino, As, ChibiOS/RT, CircuitPython, For HID, FreeBSD, Hundreds, In AmigaOS, In Linux, In Mac OS, In Microsoft Windows, In NetBSD, In RISC OS, In Windows CE, In Zephyr OS, IO, IoT, I²C
related to Popular cable systems · 33
I2C → A2005, Adafruit, DFRobot, Digilent, FPGA, GND, GNDBreakout Garden, GNDUEXT, GPIO/interrupt, GPIO/reset, Interface, JST PH, JST SH, Molex SL, Olimex, On, Pimoroni, PWM, Qwiic, Raspberry Pi
related to Messaging example: 24C32 EEPROM · 17
I2C → Accordingly, Address High, Address Low, After, EEPROM, EEPROMs, I2C EEPROMs, One, SMBus, START, STOP, That, The, These, When, While, Writing
related to Differences between modes · 16
I2C → ACK, All, Clock, Compatibility, Fast, For, High, It, LED, Mbit/s, Only, SPI, The, There, This, Ultra-Fast
related to Derivative technologies · 15
I2C → ACCESS, AdvancedTCA, DDC, High-availability, Intelligent Platform Management Bus, IPMB, IPMI, MicroTCA, Multi-controller I2C, PMBus, Power Management Bus, SMBus, System Management Bus, These, VESA Display Data Channel
related to Invention · 14
I2C → Both, CAB, COMIC, Eindhoven, European Patent EP0051332B1 Ad, Herman Schutte, In, Koninklijke Philips NV, Moelands, Philips, The, The US, Two-wire, US
related to Further reading · 12
I2C → Dominique, Elektor International Media, From Theory, Himpe, I2C Bus, ISBN, Mastering, Paret, Practice, The I2C Bus, Vincent, Wiley
related to Circuit interconnections · 11
I2C → Arduino, CAT5, GND, However, ICs, Raspberry Pi, SCL, SDA, The, To, VCC
related to Timing diagram · 11
I2C → B1, B2, Bn, Data, For, Note, SCL, SDA, The, This, To
related to Buffering and multiplexing · 8
I2C → Analog, Buffers, For, Many, Multiplexers, One, This, When

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

bus target data controller clock one devices address smbus scl used may message sda low arbitration bit stop device systems

I2C relationships Subject–Predicate–Object triples

TTTA extracted 250 structured relationships around I2C. Examples in this analysis include I2C → Bitrate → 0.1, 0.4, 1.0, 3.4 or 5.0 Mbit/s depending on mode and I2C → Data signal → Open-collector or open-drain. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
I2CBitrate0.1, 0.4, 1.0, 3.4 or 5.0 Mbit/s depending on mode1.00infobox
I2CData signalOpen-collector or open-drain1.00infobox
I2CDesigned1980; 46 years ago (1980)1.00infobox
I2CDesignerPhilips Semiconductors (now NXP Semiconductors)1.00infobox
I2CProtocolSerial, half-duplex1.00infobox
I2CSCLClock Pin1.00infobox
I2CSDAData Pin1.00infobox
I2CTypeSerial communication bus1.00infobox
I2CWidth1-bit (SDA) with separate clock (SCL)1.00infobox
I2Cis acapability of a microcontroller to control a network of device chips with just two general-purpose I/O pins0.90text
I2Cis ashared bus0.90text
I2C must use one of several schemes for preventing latch-upinstance ofBuffers for bi-directional lines0.80text

Related concept clusters Concept neighborhoods

The concept neighborhoods around I2C bring nearby vocabulary together. In this analysis, examples include Hardware, Systems and Target. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • I2C
    • Hardware
    • Systems
    • Target
    • Devices
    • Use
    • One
    • Data
    • Controller
    • Clock
    • Device
    • Smbus
    • Used
  • i2c
    • Hardware
    • Systems
    • Target
    • Devices
    • Use
    • One
    • Data
    • Controller
    • Clock
    • Device
    • Smbus
    • Used
  • bus
    • I2c
    • Devices
    • Controller
    • Address
    • Data
    • Start
    • Clock
    • Speed
    • May
    • Signals
    • Mode
    • Multiple
  • extended display identification data
    • Bit
    • Controller
    • Target
    • Address
    • Message
    • Clock
    • Sda
    • Scl
    • First
    • Protocol
    • Start
    • Line
  • display data channel
    • Bit
    • Controller
    • Target
    • Address
    • Message
    • Clock
    • Sda
    • Scl
    • First
    • Protocol
    • Start
    • Line
  • serial peripheral interface bus
    • I2c
    • Devices
    • Controller
    • Address
    • Data
    • Start
    • Clock
    • Speed
    • May
    • Signals
    • Mode
    • Multiple
  • system management bus
    • I2c
    • Devices
    • Controller
    • Address
    • Data
    • Start
    • Clock
    • Speed
    • May
    • Signals
    • Mode
    • Multiple
  • smbus
    • Protocol
    • Address
    • Addresses
    • Message
    • Read
    • Systems
    • Used
    • Eeprom
    • Two
    • Also
    • Must
    • Arbitration

Connections between topic areas Semantic bridges

For I2C, one of the stronger structural bridges in this analysis connects I2C with Design. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
I2C — Design · splits 104 ⟂ 43
I2C — Overview · splits 110 ⟂ 37
I2C — Operating system support · splits 117 ⟂ 30
I2C — Popular cable systems · splits 132 ⟂ 15
I2C — Derivative technologies · splits 135 ⟂ 12
I2C — Development tools · splits 141 ⟂ 6
I2C — Limitations · splits 144 ⟂ 3

Map overview Semantic statistics

I2C

Nodes147
Edges146
Triples250
Avg. degree1.99
Density0.013605
Components1

Source & methodology

TTTA analyzes the structure around I2C to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Design, Operating system support & Popular cable systems, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — I2C · EN edition · Analysis: TopicsToTalkAbout

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