AN4228 datasheet(33/90 Pages) STMICROELECTRONICS

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AN4228

Peripheral migration

3.14

I2C interface

The STM32F3 series embeds a new I2C peripheral versus the STM32F1 series. The

architecture, features and programming interface are different.

As a consequence, the STM32F3 series I2C programming procedures and registers are

different from those of the STM32F1 series, so any code written for the STM32F1 series

using the I2C needs to be rewritten to run on STM32F3 series.

The STM32F3 series I2C provides best-in-class new features:



Communication events managed by hardware.



Programmable analog and digital noise filters.



Independent clock source: HSI or SYSCLK.



Wake-up from STOP mode.



Fast mode + (up to 1MHz) with 20mA I/O output current drive.



7-bit and 10-bit addressing mode, multiple 7-bit slave address support with

configurable masks.



Address sequence automatic sending (both 7-bit and 10-bit) in master mode.



Automatic end of communication management in master mode.



Programmable Hold and Setup times.



Command and Data Acknowledge control.

For more information about STM32F3 I2C features, please refer to I2C chapter of

STM32F30/31xx and STM32F37/38xx Reference Manuals (RM0316 and RM0313).

AN4228 Datasheet(PDF) 33 Page - STMicroelectronics