STM3220G-EVAL STMicroelectronics, STM3220G-EVAL Datasheet - Page 14

• Manufacturer Part Number: STM3220G-EVAL
• Description: 16/32-BITS MICROS
• Manufacturer: STMicroelectronics
• Series: STM32r
• Type: MCUr

Specifications of STM3220G-EVAL

• Contents: Board
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: STM32 F2 Series

Demonstration architecture overview
3.8
Note:
14/19
Audio player
The audio player retrieves the WAV files stored in the “Audio” directory in the connected
USB Flash disk (connected to the USB OTG FS port).
Figure 19. Audio player diagram
The user can Stop/Play/Resume/Go Back/ Forward and Mute the audio sample and can
select the title to be played directly from the playlist.
Figure 20. Audio player interface
The user can use a headset or the embedded speaker to output the audio sample. The
peripheral is detected automatically: when the headset is removed, the speaker
automatically is used. The audio player supports all WAV PCM audio files with the
configuration listed in
Table 3.
This limitation is due to the audio codec used on the STM3220G-EVAL board which accepts
a fixed Master Clock frequency while the STM32F2xx I2S provides a Master clock at a fixed
rate of 256 x f
when listening to audio files with a sample rate below 32 Hz, and use a headset or speaker
for other audio files.
Sample rate
Channel number
Audio Data Format
Audio file configurations
S
(where f
Parameter
Table
S
is the audio sampling rate). It is recommended to use the headset
3.
Doc ID 018665 Rev 2
Stereo/Mono
8 to 96 kHz.
16 bits
Value
UM1069