Datasheet

Functional overview STM8L15xx8, STM8L15xR6
24/134 DocID17943 Rev 6
3.17.3 USART
The USART interfaces (USART1, USART2 and USART3) allow 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, USART2 and USART3 can be served by the DMA1 Controller.
3.18 Infrared (IR) interface
The high density and medium+ density STM8L15xx 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.
3.19 Development support
Development tools
Development tools for the STM8 microcontrollers include:
• The STice emulation system offering tracing and code profiling
• The STVD high-level language debugger including C compiler, assembler and
integrated development environment
• The STVP Flash programming software
The STM8 also comes with starter kits, evaluation boards and low-cost in-circuit
debugging/programming tools.
Single wire data interface (SWIM) and debug module
The debug module with its single wire data interface (SWIM) permits non-intrusive real-time
in-circuit debugging and fast memory programming.
The Single wire interface is used for direct access to the debugging module and memory
programming. The interface can be activated in all device operation modes.
The non-intrusive debugging module features a performance close to a full-featured
emulator. Beside memory and peripherals, CPU operation can also be monitored in real-
time by means of shadow registers.
Bootloader
A bootloader is available to reprogram the Flash memory using the USART1, USART2,
USART3 (USARTs in asynchronous mode), SPI1 or SPI2 interfaces. The reference
document for the bootloader is UM0560: STM8 bootloader user manual.