STLUX datasheet(27/126 Pages) STMICROELECTRONICS

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STLUX

Product overview

126

5.7.2

Universal asynchronous receiver/transmitter (UART)

UART is the asynchronous receiver/transmitter communication interface.



SW flow control operating mode



Full duplex, asynchronous communications



High precision baud rate generator system

–

Common programmable transmit and receive baud rates up to fMASTER/16



Programmable data word length (8 or 9-bit)



Configurable stop bit - support for 1 or 2 stop bit



Configurable parity control



Separate enable bits for transmitter and receiver



Interrupt sources:

–

Transmit events

–

Receive events

–

Error detection flags



2 interrupt vectors:

–

Transmitter interrupt

–

Receiver interrupt



Reduced power consumption mode



Wakeup from mute mode (by idle line detection or address mark detection)



2 receiver wakeup modes:

–

Address bit (MSB)

–

Idle line.

5.7.3

Inter-integrated circuit interface (I2C)

The I2C (inter-integrated circuit) bus interface serves as an interface between the

microcontroller and the serial I2C bus. It provides a multimaster capability, and controls all

I2C bus-specific sequencing, protocol, arbitration and timing. It supports standard and fast

speed modes.



Parallel-bus/I2C protocol converter



Multimaster capability: the same interface can act as master or slave



I2C master features:

–

Clock generation

–

Start and stop generation



I2C slave features:

–

Programmable I2C address detection

–

Stop bit detection



Generation and detection of 7-bit/10-bit addressing and general call



Supports different communication speeds:

–

Standard speed (up to 100 kHz)

–

Fast speed (up to 400 kHz)

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