STM32F302XD datasheet(28/168 Pages) STMICROELECTRONICS

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Functional overview

STM32F302xD STM32F302xE

28/168

DocID026900 Rev 4

All I2C bus interfaces support 7-bit and 10-bit addressing modes, multiple 7-bit slave

addresses (2 addresses, 1 with configurable mask). They also include programmable

analog and digital noise filters.

In addition, they provide hardware support for SMBUS 2.0 and PMBUS 1.1: ARP capability,

Host notify protocol, hardware CRC (PEC) generation/verification, timeouts verifications and

ALERT protocol management. They also have a clock domain independent from the CPU

clock, allowing the I2Cx (x=1,2,3) to wake up the MCU from Stop mode on address match.

The I2C interfaces can be served by the DMA controller.

Refer to Table 7 for the features available in I2C1, I2C2 and I2C3.

3.21

Universal synchronous/asynchronous receiver transmitter

(USART)

The STM32F302xD/E devices have three embedded universal synchronous/asynchronous

receiver transmitters (USART1, USART2 and USART3).

The USART interfaces are able to communicate at speeds of up to 9 Mbit/s.

They provide hardware management of the CTS and RTS signals, they support IrDA SIR

ENDEC, the multiprocessor communication mode, the single-wire half-duplex

Table 6. Comparison of I2C analog and digital filters

Analog filter

Digital filter

Pulse width of

suppressed spikes

≥ 50 ns

Programmable length from 1 to 15

I2C peripheral clocks

Benefits

Available in Stop mode

1. Extra filtering capability vs.

standard requirements.

2. Stable length

Drawbacks

Variations depending on

temperature, voltage, process

Wakeup from Stop on address

match is not available when digital

filter is enabled.

Table 7. STM32F302xD/E I2C implementation

I2C features(1)

I2C1

I2C2

I2C3

7-bit addressing mode

10-bit addressing mode

Standard mode (up to 100 kbit/s)

Fast mode (up to 400 kbit/s)

Fast Mode Plus with 20mA output drive I/Os (up to 1 Mbit/s)

Independent clock

SMBus

Wakeup from STOP

1. X = supported.

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