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文件名称：i2c 总线协议规范
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更新时间：2020-09-30 03:34:45
IIC协议
The I2C-bus specification1 PREFACE
1.1 Version 1.0 - 1992
This version of the 1992 I2C-bus specification includes the
following modifications:
?Programming of a slave address by software has been
omitted. The realization of this feature is rather
complicated and has not been used.
?The “low-speed mode” has been omitted. This mode is,
in fact, a subset of the total I2C-bus specification and
need not be specified explicitly.
?The Fast-mode is added. This allows a fourfold increase
of the bit rate up to 400 kbit/s. Fast-mode devices are
downwards compatible i.e. they can be used in a 0 to
100 kbit/s I2C-bus system.