DocID024597 Rev 5 1233/1830
RM0351 Inter-integrated circuit (I2C) interface
1301
39.4 I2C functional description
In addition to receiving and transmitting data, this interface converts it from serial to parallel
format and vice versa. The interrupts are enabled or disabled by software. The interface is
connected to the I
2
C bus by a data pin (SDA) and by a clock pin (SCL). It can be connected
with a standard (up to 100 kHz), Fast-mode (up to 400 kHz) or Fast-mode Plus (up to
1MHz) I
2
C bus.
This interface can also be connected to a SMBus with the data pin (SDA) and clock pin
(SCL).
If SMBus feature is supported: the additional optional SMBus Alert pin (SMBA) is also
available.
Fast-mode Plus with 20mA output drive I/Os (up to 1 Mbit/s) X X X
Independent clock X X X
SMBus X X X
Wakeup from Stop 0 mode X X X
Wakeup from Stop 1 mode X X X
Wakeup from Stop 2 mode - - X
1. X = supported.
Table 216. STM32L475xx/476xx/486xx devices I2C implementation
I2C features
(1)
I2C1 I2C2 I2C3
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