Editing I²C (section)

==Revisions==
{| class="wikitable"
|+ History of I<sup>2</sup>C specification releases
! Year
! Version
! Notes
! Refs
|-
| 1980
| Patent
| In 1980, "Philips Nv" filed for a patent in Netherlands. In 1981, "U.S. Phillips Corp" applied for a patent in U.S. then later assigned in 1987 as U.S. Patent 4,689,740.
| <ref name="i2c-patent-NL">{{cite patent |country=NL |number=8005976A |status=Patent |title=Two-Wire Bus-System Comprising A Clock Wire And A Data Wire For Interconnecting A Number Of Stations |gdate= |fdate=1980-10-31 |assign1=Philips Electronics Nv |url=https://patents.google.com/patent/NL8005976A/en}}</ref><ref name="i2c-patent-US">{{cite patent |country=US |number=4689740 |status=Patent |title=Two-Wire Bus-System Comprising A Clock Wire And A Data Wire For Interconnecting A Number Of Stations |gdate=1987-08-25 |fdate=1981-11-02 |assign1=U.S. Philips Corporation |url=https://patents.google.com/patent/US4689740A/en}}</ref><ref name="EETimes-20011017">{{cite web |title=Philips sues eight more companies for infringement of I2C bus patent |url=https://www.eetimes.com/philips-sues-eight-more-companies-for-infringement-of-i2c-bus-patent/ |publisher=[[EE Times]] |archive-url=https://web.archive.org/web/20210402162144/https://www.eetimes.com/philips-sues-eight-more-companies-for-infringement-of-i2c-bus-patent/ |archive-date=April 2, 2021 |date=October 17, 2001 |url-status=live}}</ref>
|-
| 1982
| Original
| The {{nowrap|100 kbit/s}} I<sup>2</sup>C system was created as a simple internal bus system for building control electronics with various Philips chips.
| {{N/A}}
|-
| 1992
| 1
| Added {{nowrap|400 kbit/s}} ''Fast-mode (Fm)'' and a 10-bit addressing mode to increase capacity to 1008 nodes. This was the first standardized version.
| {{N/A}}
|-
| 1998
| 2
| Added {{nowrap|3.4 Mbit/s}} ''High-speed mode (Hs)'' with power-saving requirements for electric voltage and current.
| <ref name="i2c-spec-2.0">[https://web.archive.org/web/20200528003930/http://esd.cs.ucr.edu/webres/i2c20.pdf I<sup>2</sup>C-bus specification Rev 2.0; Philips Semiconductors; December 1998; Archived.]</ref>
|-
| 2000
| 2.1
| Clarified version 2, without significant functional changes.
| <ref name="i2c-spec-2.1">[https://web.archive.org/web/20070212223025/http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf  I<sup>2</sup>C-bus specification Rev 2.1; Philips Semiconductors; January 2000; Archived.]</ref>
|-
| 2007
| 3
| Added {{nowrap|1 Mbit/s}} ''Fast-mode plus (Fm+)'' (using 20&nbsp;mA drivers), and a device ID mechanism.
| <ref name="i2c-spec-3">[https://web.archive.org/web/20120207003629/http://www.nxp.com/documents/user_manual/UM10204.pdf  I<sup>2</sup>C-bus specification Rev 3; NXP Semiconductors; June 19, 2007; Archived.]</ref>
|-
| 2012
| 4
| Added {{nowrap|5 Mbit/s}} ''Ultra Fast-mode (UFm)'' for new USDA (data) and USCL (clock) lines using [[Push–pull output|push-pull]] logic without [[pull-up resistors]],<br/>and added an assigned manufacturer ID table. It is only a [[Simplex communication|unidirectional]] bus.
| <ref name="i2c-spec-4">[https://web.archive.org/web/20120502134707/http://www.nxp.com/documents/user_manual/UM10204.pdf  I<sup>2</sup>C-bus specification Rev 4; NXP Semiconductors; February 13, 2012; Archived.]</ref>
|-
| 2012
| 5
| Corrected mistakes.
| <ref name="i2c-spec-5">[https://web.archive.org/web/20121017153327/http://www.nxp.com/documents/user_manual/UM10204.pdf  I<sup>2</sup>C-bus specification Rev 5; NXP Semiconductors; October 9, 2012; Archived.]</ref>
|-
| 2014
| 6
| Corrected two graphs.
| <ref name="i2c-spec-6">{{cite web |title=I<sup>2</sup>C-bus specification Rev 6 |url=https://www.nxp.com/docs/en/user-guide/UM10204.pdf |publisher=[[NXP Semiconductors]] |archive-url=https://web.archive.org/web/20210426060837/https://www.nxp.com/docs/en/user-guide/UM10204.pdf |archive-date=April 26, 2021 |date=April 4, 2014 |url-status=dead}}</ref>
|-
| 2021
| 7
| Changed terms "[[Master/slave (technology)|master/slave]]" to "controller/target" to align with [[I3C (bus)|I3C bus]] specification.<br/>Updated Table 5 assigned manufacturer IDs. Added Section 9 overview of I3C bus. This is the current standard.
| <ref name="i2c-spec">{{cite web |title=I<sup>2</sup>C-bus specification Rev 7 |url=https://www.nxp.com/docs/en/user-guide/UM10204.pdf |publisher=[[NXP Semiconductors]] |archive-url=https://web.archive.org/web/20221006073143/http://www.nxp.com/docs/en/user-guide/UM10204.pdf |archive-date=October 6, 2022 |date=October 1, 2021 |url-status=dead}}</ref>
|}