Features
 Plays audio from SD card
 Plays audio from SPI Flash (separate
firmware)
 Plays MIDI andWAV (PCM, IMA ADPCM)
 Firmware and content can be customized
 Controlled via SPI (SD) or UART (SPI
FLASH)
 High-performance CD-quality analog out
 Supports various sample rates
 Operates from a single supply (VCC=4.0
to 6.0 V)
(Note: IO pins are not 5V-tolerant. Do
not drive them over 3.6 V!)
 Line output
 Headphone output
 Line input
 Microphone input
 SPI FLASH for code and/or audio data
storage
 SD connector for large audio data storage
 The most useful signals are routed to
pin headers for easy access and customization

Description
The VS1103 Module is a small, low-cost, highperformance,
easy-to-use audio player that is
controlled from serial control interface (when
playing from SD card) or an UART (when
playing from SPI FLASH). It can be used as
a “plug-in” audio board in electronic systems
or as a standalone small audio player.
The product is supported by design services,
audio content preparation and pre-programming.
It is also fully configurable by the user by using
free Integrated Development Tools (VSIDE)
for the VS1103 IC. The use of the module
does not require any advanced information
from the user.
Pin headers of the PCB are compatible with
DIL32 footprint 2.54 pitch 15.24 mm wide (100
mils pitch, 600 mils wide). This makes it possibe
to use standard DIL32 ZIF sockets or
solder it by using DIL32 footprint.
The left row of the PCB has digital connections
for SPI control or other circuitry. The
right row has power connections, analog connections
and a serial port. These can be
used to interface the board with a PC and
VSIDE or a host microcontroller.
The VS1103 Module operates from a single
power supply. The board has either 2MBytes
(VSMD301) or 16MBytes (VSMD321) of onboard
FLASH and a SD card connector for
audio content. The module boots from the
on-board FLASH memory.