STM32F070F6 datasheet(21/83 Pages) STMICROELECTRONICS

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STM32F070CB/RB/C6/F6

Functional overview

3.13

Inter-integrated circuit interfaces (I2C)

Up to two I2C interfaces (I2C1 and I2C2) can operate in multimaster or slave modes. Both

can support Standard mode (up to 100 kbit/s) or Fast mode (up to 400 kbit/s). I2C1 also

supports Fast Mode Plus (up to 1 Mbit/s), with 20 mA output drive.

Both support 7-bit and 10-bit addressing modes, multiple 7-bit slave addresses (two

addresses, one with configurable mask). They also include programmable analog and

digital noise filters.

In addition, I2C1 provides 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.

The I2C interfaces can be served by the DMA controller.

Refer to Table 6 for the differences between I2C1 and I2C2.

3.14

Universal synchronous/asynchronous receiver/transmitter

(USART)

The device embeds up to four universal synchronous/asynchronous receivers/transmitters

that communicate at speeds of up to 6 Mbit/s.

Table 5. 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

Table 6. STM32F070CB/RB/C6/F6 I2C implementation(1)

1. X = supported.

I2C features

I2C1

I2C2(2)

2. Only available on STM32F070xB devices.

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 (up to 1 Mbit/s), with 20mA output drive I/Os

Independent clock

SMBus

Wakeup from STOP

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