STM8S datasheet(321/467 Pages) STMICROELECTRONICS

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RM0016

Universal asynchronous receiver transmitter (UART)

377

22.2

UART main features

•

Full duplex, asynchronous communications

•

NRZ standard format (Mark/Space)

•

High-precision baud rate generator system

–

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

•

Programmable data word length (8 or 9 bits)

•

Configurable stop bits

–

Support for 1 or 2 stop bits

•

LIN Master mode (UART1, UART2, UART3 and UART4)

–

LIN break and delimiter generation

–

LIN break and delimiter detection with separate flag and interrupt source for

readback checking

•

LIN Slave mode (UART2, UART3 and UART4)

–

Autonomous header handling and mute mode to filter responses

–

Identifier parity error checking

–

LIN automatic resynchronization, allowing operation with internal RC oscillator

(HSI) clock source.

–

Break detection at any time, even during a byte reception

–

Header errors detection:

Delimiter too short

Synch field error

Deviation error (if automatic resynchronization is enabled)

Framing error in synch field or identifier field

Header timeout

•

Transmitter clock output for synchronous communication (UART1, UART2 and UART4)

•

IrDA SIR Encoder Decoder (UART1, UART2 and UART4)

–

Support for 3/16 bit duration for normal mode

•

Smartcard Emulation Capability (UART1, UART2 and UART4)

–

Smartcard interface supporting the asynchronous protocol for Smartcards as

defined in ISO 7816-3 standards

–

1.5 Stop bits for Smartcard operation

•

Single wire Half Duplex Communication (UART1 and UART4)

•

Separate enable bits for Transmitter and Receiver

•

Transfer detection flags:

–

Receive buffer full

–

Transmit buffer empty

–

End of Transmission flags

•

Parity control

–

Transmits parity bit

–

Checks parity of received data byte

•

4 error detection flags

–

Overrun error

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