I2C

Main features:

• multimaster capability: the same interface can act as master and slave
• I2C Master features:
  • clock generation
  • start and stop generation
• I2C slave features:
  • programmable I2C address detection
  • dual addressing capability to acknowledge 2 slave addresss
  • stop bit detection

I2C - addressing

• each device has its own unique address
• address is 7-bit long
• it has to be fast and automatic (after query there is an inmediate response)

I2C in STM32F4:

• generation and detection of 7/10-bit addressing
• supports different communication speeds
  • standard up to 100kHz
  • fast up to 400kHz
• programmable digital noise filter
• optional clock stretching
• 1-byte buffer with DMA capability
• master transmitter (7 or 10bit)
• one device can own 2 addresses