System Setup; Demonstration Kit Output Mode; Onboard Speaker Configuration; External Mono Speaker Or Headphone Configuration - ST STM32 User Manual

System setup

7 System setup
STM32 performance line USB demonstration kit can be used in two application software
modes together with at least five audio input / output connection schemes. This chapter
gives a brief description of all possible audio hardware settings. The present demonstration
kit is designed to be operated always with a personal computer and powered via USB
peripheral bus.
Warning:
7.1

Demonstration kit output mode

7.1.1

Onboard speaker configuration

This is the default configuration after the STM32 performance line USB demonstration kit is
plugged into the available PC USB port. The green LED LD2 switches on when the
demonstration kit is in operating mode. The PC automatically detects the new
demonstration kit and all audio outputs are automatically redirected to the new sound device
by Windows. For example, play any multimedia content on a media player, and listen to the
audio output from the onboard speaker.
Figure 6.
7.1.2

External mono speaker or headphone configuration

The system setup is the same as for the default onboard speaker mode. Just connect
properly the selected external speaker, and follow the instructions given in
is switched on when the demonstration kit operates in this mode.
12/46
www.BDTIC.com/ST
Do not attach the external speakers when the STM32
performance line USB demonstration kit is powered on, that
is when the card is connected via USB with PC. It is
recommended to always unplug the card from your PC before
connecting or disconnecting the external speakers. Short-
circuiting the power audio amplifier output pins may damage
the power audio amplifier output stages.
Onboard speaker system setup
Doc ID 15867 Rev 1
UM0722
Section 9.7 LD2