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an476+i2c和smbus比较Maxim > App Notes > BATTERY MANAGEMENT

POWER-SUPPLY CIRCUITS

Keywords: I2C, SMB, serial interface, i2c bus, 2-wire buses, smbus

Dec 01, 2000

APPLICATION NOTE 476

Comparing the I2C Bus to the SMBus
Abstract: The I2C bus and the SMBus are popular 2-wire buses that are essentially compatible with each other. Normally devices, both masters and slaves, are freely interchangeable between both buses. Both buses feature addressable slaves (although specific address allocations can vary between the two). The buses operate at the same speed, up to 100kHz, but the I2C bus has both 400kHz and 2MHz versions. Complete compatibility between both buses is ensured only below 100kHz. This application note focuses on the significant differences between I2C and SMB. The IC bus and the SMBus are popular 2