AN3117 Datasheet PDF - STMicroelectronics

Introduction
   This application note describes how to use the direct memory access (DMA) controller of the STM8L05xxx/15xxx, STM8L162xx and STM8AL31xx/3Lxx devices. Table 1 shows the STM8 products covered by this application note.
   The DMA controller, the STM8™ core and the memory system contribute to provide a high data bandwidth and to develop very low latency response time software.
   This application note also describes how to take full advantage of these features and ensure correct response times for different peripherals and subsystems.