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docs: i2c: summary: update I2C specification link

Luckily, the specs are directly downloadable again, so update the link.
Also update its title to the original name "I²C".

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
Wolfram Sang 2024-06-21 09:30:09 +02:00
parent d18b822c8f
commit 75d148c90a

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@ -11,11 +11,9 @@ systems. Some systems use variants that don't meet branding requirements,
and so are not advertised as being I2C but come under different names, and so are not advertised as being I2C but come under different names,
e.g. TWI (Two Wire Interface), IIC. e.g. TWI (Two Wire Interface), IIC.
The latest official I2C specification is the `"I2C-bus specification and user The latest official I2C specification is the `"I²C-bus specification and user
manual" (UM10204) <https://www.nxp.com/webapp/Download?colCode=UM10204>`_ manual" (UM10204) <https://www.nxp.com/docs/en/user-guide/UM10204.pdf>`_
published by NXP Semiconductors. However, you need to log-in to the site to published by NXP Semiconductors, version 7 as of this writing.
access the PDF. An older version of the specification (revision 6) is archived
`here <https://web.archive.org/web/20210813122132/https://www.nxp.com/docs/en/user-guide/UM10204.pdf>`_.
SMBus (System Management Bus) is based on the I2C protocol, and is mostly SMBus (System Management Bus) is based on the I2C protocol, and is mostly
a subset of I2C protocols and signaling. Many I2C devices will work on an a subset of I2C protocols and signaling. Many I2C devices will work on an