DocID026482 Rev 1

5/24

AN4515

Application Overview

23

1

Application Overview

This section gives an overview of the application note use case, details how the user can

implement the BAM and describes each low-power mode involved in the use case

operation.

1.1

Hardware high level description

This document first explains how to assess power consumption in different low-power

modes (Standby, Sleep, Stop and Low-power run) and then highlights the significant power

reduction achieved by using the BAM to transfer sensor (MEMS LSM303DLHC) data

direction (UP or DOWN) to a master STM32F411xx microcontroller.

The data sent by the sensor is received via the I2C interface and transferred by DMA to the

RAM. After processing data, the DMA sends the data direction to the UART. It is then

displayed via the USB virtual comport.

Figure 1 shows a high-level block diagram of the application.

Figure 1. Application high level block diagram

Note:

The next version of this application note will include the X-Nucleo IKS01A1 as sensor

instead of 32F401CDISCOVERY (STM32F401C-DISCO order code).