ST STM32 User Manual

1 Introduction
This user manual describes hardware and software of the STMicroelectronics™ STM32™
performance line USB demonstration kit based on the STM32F103 microcontroller and the
2
I S TS4657 audio digital to analog converter (decoder). The audio output can be
implemented either with the TS4962 driven onboard speaker which output is also available
on the onboard mono jack connector, or through TS2012 stereo audio amplifier which can
drive external speakers. Both audio amplifiers are Class-D. The audio input is available with
an onboard microphone which is connected through TS472 microphone preamplifier to the
ADC input of the microcontroller. To facilitate the reuse of the boards, the controller and the
audio card can be disconnected, and used separately for other purposes.
This demonstration kit primarily offers a USB interface operating either under USB Audio
Device Class for audio streaming, or Device Firmware Upgrade class (DFU) for application
reprogramming through the USB. All design information are included in the kit and can be
reused for a new development. The demonstration kit allows a quick evaluation of
STMicroelectronics low-voltage audio components in Human machine interface (HMI) audio
input/output, portable audio equipment, and simple PC USB demonstration kit applications.
Figure 1. STM32F103 USB demonstration kit - top view
August 2009
www.BDTIC.com/ST
Getting started with STEVAL-CCA021V1,
STM32 performance line USB demonstration kit
Doc ID 15867 Rev 1
UM0722
User manual
1/46
www.st.com