STM32MP157C datasheet(52/258 Pages) STMICROELECTRONICS

52 / 258 page

Functional overview

STM32MP157C

52/258

DS12505 Rev 2

3.39

Inter-integrated circuit interface (I2C1, I2C2, I2C3, I2C4, I2C5,

I2C6)

The STM32MP157C embeds six I2C interfaces.

The I2C bus interface handles communications between the STM32MP157C and the serial

I2C bus. It controls all I2C bus-specific sequencing, protocol, arbitration and timing.

The I2C peripheral supports:

•

I2C-bus specification and user manual rev. 5 compatibility:

–

Slave and master modes, multimaster capability

–

Standard-mode (Sm), with a bitrate up to 100 kbit/s

–

Fast-mode (Fm), with a bitrate up to 400 kbit/s

–

Fast-mode Plus (Fm+), with a bitrate up to 1 Mbit/s and 20 mA output drive I/Os

–

7-bit and 10-bit addressing mode, multiple 7-bit slave addresses

–

Programmable setup and hold times

–

Optional clock stretching

•

System management bus (SMBus) specification rev 2.0 compatibility:

–

Hardware PEC (packet error checking) generation and verification with ACK

control

–

Address resolution protocol (ARP) support

–

SMBus alert

•

Power system management protocol (PMBus™) specification rev 1.1 compatibility

•

Independent clock: a choice of independent clock sources allowing the I2C

communication speed to be independent from the PCLK reprogramming.

•

Wakeup from Stop mode on address match

•

Programmable analog and digital noise filters

•

1-byte buffer with DMA capability

I2C4 and I2C6 can be defined (in ETZPC) as accessible by secure software only.

3.40

Universal synchronous asynchronous receiver transmitter

(USART1, USART2, USART3, USART6 and UART4, UART5,

UART7, UART8)

The STM32MP157C devices have four embedded universal synchronous receiver

transmitters (USART1, USART2, USART3 and USART6) and four universal asynchronous

receiver transmitters (UART4, UART5, UART7 and UART8). Refer to Table 5 for a summary

of USARTx and UARTx features.

These interfaces provide asynchronous communication, IrDA SIR ENDEC support,

multiprocessor communication mode, single-wire half-duplex communication mode and

have LIN master/slave capability. They provide hardware management of the CTS and RTS

signals, and RS485 Driver Enable. They are able to communicate at speeds of up to

10 Mbit/s.

USART1, USART2, USART3 and USART6 also provide Smartcard mode (ISO 7816

compliant) and SPI-like communication capability.

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