STM8L151F3P6 datasheet(23/112 Pages) STMICROELECTRONICS

23 / 112 page

STM8L151x2, STM8L151x3

Functional overview

Doc ID 018780 Rev 4

23/112

3.15

Communication interfaces

3.15.1

SPI

The serial peripheral interface (SPI1) provides half/ full duplex synchronous serial

communication with external devices.

●

Maximum speed: 8 Mbit/s (fSYSCLK/2) both for master and slave

●

Full duplex synchronous transfers

●

Simplex synchronous transfers on 2 lines with a possible bidirectional data line

●

Master or slave operation - selectable by hardware or software

●

Hardware CRC calculation

●

Slave/master selection input pin

Note:

SPI1 can be served by the DMA1 Controller.

3.15.2

I²C

The I2C bus interface (I2C1) provides multi-master capability, and controls all I²C bus-

specific sequencing, protocol, arbitration and timing.

●

Master, slave and multi-master capability

●

Standard mode up to 100 kHz and fast speed modes up to 400 kHz.

●

7-bit and 10-bit addressing modes.

●

SMBus 2.0 and PMBus support

●

Hardware CRC calculation

Note:

I2C1 can be served by the DMA1 Controller.

3.15.3

USART

The USART interface (USART1) allows full duplex, asynchronous communications with

external devices requiring an industry standard NRZ asynchronous serial data format. It

offers a very wide range of baud rates.

●

1 Mbit/s full duplex SCI

●

SPI1 emulation

●

High precision baud rate generator

●

Smartcard emulation

●

IrDA SIR encoder decoder

●

Single wire half duplex mode

Note:

USART1 can be served by the DMA1 Controller.

3.16

Infrared (IR) interface

The Low density STM8L15x devices contain an infrared interface which can be used with an

IR LED for remote control functions. Two timer output compare channels are used to

generate the infrared remote control signals.

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