The WTV020SD is a small, simple IC for embedding audio-playback into
your next project. These devices are commonly used in children's toys
and "talking" retail displays. This breakout board allows you to access
the functionality of the WTV020SD to give a voice to your next project.
The breakout board includes a battery connector and a micro-SD card
slot. Simply load your audio files onto a micro-SD card and plug it in,
power up the module and trigger the playback. Playback can be triggered
in either key or serial mode.
The key-mode provides a stand alone operation where a host micro is
not required. With only 3 push buttons, a 3V battery and a speaker, an
extremely compact and low component count MP3-Player like system can be
implemented.
The serial-mode provides a simple, 2-wire interface to any
micro-controller via its DATA and CLK lines. Audio operations such as
PLAY, PAUSE, STOP and VOLUME control functions are all available to the
host micro via simple serial commands.
The audio compression used in this module is a little strange (4-bit
ADPCM @ 6-32kHz) so you'll need to download the utility in the documents
below in order to convert your .WAV files into the 4-bit ADPCM format
required |
