1992 I2C 总线规范的这个版本有以下的修正

• 删除了用软件编程从机地址的内容因为实现这个功能相当复杂而且不被使用

• 删除了低速模式实际上这个模式是整个I2C 总线规范的子集不需要明确地详细说明

• 增加了快速模式它将位速率增加4 倍到达400kbit/s 快速模式器件都向下兼容即它们可以在

0~100kbit/s 的I2C 总线系统中使用

• 增加了10 位寻址允许1024 个额外的从机地址

• 快速模式器件的斜率控制和输入滤波改善了EMC 性能-1992 I2C bus specification of this version has the following correction

•　Remove the software program　the content of the slave address because to achieve this function is quite complex and is not used

•　Remove the low-speed mode This mode is actually a subset of the entire I2C bus specification need not explicitly described in detail

•　Fast mode increases the bit rate will increase 4 times reach 400kbit/s Fast-mode devices are backward compatible in that they can

0 ~ 100kbit/s I2C-bus system

•　an increase of 10-bit addressing allows 1024 additional slave address

Slope control and input filter •　Fast-mode devices improves EMC performance