OLIMEX MOD-MP3-X, MOD-MP3-X-BAT User Manual
MOD-MP3-X and MOD-MP3-X-BAT
development boards
Users Manual
All boards produced by Olimex are ROHS compliant
Revision D, March 2012
Copyright(c) 2011, OLIMEX Ltd, All rights reserved
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INTRODUCTION:
MOD-MP3-X is MP3 player module based on VS1053 Ogg
Vorbis/MP3/AAC/-WMA/MIDI audio decoder and an IMA ADPCM and userloadable Ogg Vorbis encoder; supports VBR (variable bit rate) for MP3; Supports
streaming. It also employs an on-board STM32F103RBT6 CORTEX-M3 microcontroller for smart control via UEXT.
MOD-MP3-X has three modes of operation:
– Standalone mode – compatible with the old revision MOD-MP3 player. In
this mode VS1053 controls the playback of files written on a micro SD card inserted
in the board. The user is provided with controls on volume, sound effects, starting,
stopping and sequencing of files to play.
- UEXT playback mode – in this mode the board can be connected as slave device to
host microcontroller which streams data to the codec via SPI.
- UEXT smart control mode – in this mode the on-board microcontroller manages
playback of files written to the micro SD card. The microcontroller acts as a slave
device and accepts user commands via UART. Commands include SD card directory listing, selecting of a file to play and playback and volume control.
STM32F103RBT6 firmware has an extra - Mass storage device, through
which you can save MP3 files to the SD card.
Note that, while the board works as mass storage device, it can not work in
UEXT smart control mode. If you want to use the board in UEXT smart control
mode, then the USB must not be plugged in and the board has to be power supplied
via external power supply (PWR_JACK or BATTERY).
MOD-MP3-X ships in two variants – with and without battery. The battery
variant employs a Li-ion 3.7 V, 1200 mAh rechargeable battery and an on-board battery charger.
BOARD FEATURES:
• On-board STM32F103RBT6 ARM 32-bit Cortex™-M3 microcontroller
• Based on VS1053 hardware decoder
• 3.7 V Li-ion battery and battery charger (for MOD-MP3-X-BAT)
• UEXT to connect to host microcontroller (standard connector on our
ARM development boards)
• Three modes of operation
• EEPROM with firmware for standalone mode
• micro SD card holder
• USB
• Stereo Audio microphone jack, Stereo Audio headphones jack
• Can be used to record and playback
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• Triple action joystick: Forward, Reverse, Play/Pause action
• Wake-up button
• Two status leds
• FR-4, 1.5 mm, soldermask, component print
• Dimensions: 60 x 60 mm ( 2.36 x 2.36")
ELECTROSTATIC WARNING:
The MOD-MP3-X board is shipped in protective anti-static packaging. The board
must not be subject to high electrostatic potentials. General practice for working
with static sensitive devices should be applied when working with this board.
BOARD USE REQUIREMENTS:
Cables: The cable you will need depends on the programmer/debugger you use. If
you use ARM-JTAG-EW, you will need USB A-B cable, for all types programmers
you will need ARM-JTAG-20to10 adapter.
Hardware: Programmer/Debugger ARM-JTAG-EW , ARM-USB-OCD, ARM-
USB-TINY, ARM-USB-TINY-H , ARM-USB-OCD-H or other compatible
programming/debugging tool. For EEPROM programming you can use PICkit 2
development programmer/debugger from Microchip, because we don't offer a
suitable programmer, yet.
PROCESSOR FEATURES:
MOD-MP3-X board use STM32F103RBT6 microcontroller from
STMicroelectronics with these features:
− Core: ARM 32-bit Cortex™-M3 CPU
− 72 MHz, 90 DMIPS with 1.25 DMIPS/MHz
− Single-cycle multiplication and hardware division
− Nested interrupt controller with 43 maskable interrupt channels
− Interrupt processing (down to 6 CPU cycles) with tail chaining
− Memories
− 128 Kbytes of Flash memory
− 20 Kbytes of SRAM
− Clock, reset and supply management
− 2.0 to 3.6 V application supply and I/Os
− POR, PDR, and programmable voltage detector (PVD)
− 4-to-16 MHz quartz oscillator
− Internal 8 MHz factory-trimmed RC
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− Internal 32 kHz RC
− PLL for CPU clock
− Dedicated 32 kHz oscillator for RTC with calibration
− Low power
− Sleep, Stop and Standby modes
− VBAT supply for RTC and backup registers
− 2 x 12-bit, 1 μs A/D converters (16-channel)
− Conversion range: 0 to 3.6 V
− Dual-sample and hold capability
− Synchronizable with advanced control timer
− Temperature sensor
− DMA
− 7-channel DMA controller
− Peripherals supported: timers, ADC, SPIs, I
2
Cs and USARTs
− Debug mode
− Serial wire debug (SWD) & JTAG interfaces
− 49 fast I/O ports
− 49 5 V-tolerant I/Os
− All mappable on 16 external interrupt vectors
− Atomic read/modify/write operations
− 4 timers
− 3 general purpose timers
− 1 advanced control timer
− Up to 9 communication interfaces
− 2 I
2
C interfaces (SMBus/PMBus)
− 3 USARTs (ISO 7816 interface, LIN, IrDA capability, modem control)
− 2 SPIs (18 Mbit/s)
− CAN interface (2.0B Active)
− USB 2.0 full speed interface
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BLOCK DIAGRAM:
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MEMORY MAP:
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AUDIO CODEC FEATURES:
− Decodes Ogg Vorbis; MPEG 1 & 2 audio layer III (CBR +VBR +ABR); layers I &
II optional; MPEG4 / 2 AAC-LC(+PNS), HE-AAC v2 (Level 3) (SBR + PS);
WMA4.0/4.1/7/8/9 all profiles (5-384 kbps); WAV (PCM + IMA ADPCM);
General MIDI 1 / SP-MIDI format 0 files
− Encodes Ogg Vorbis with software plugin
− Encodes IMA ADPCM from mic/line (stereo)
− Streaming support for MP3 and WAV
− EarSpeaker Spatial Processing
− Bass and treble controls
− Operates with a single 12..13MHz clock
− Can also be used with a 24..26MHz clock
− Internal PLL clock multiplier
− Low-power operation
− High-quality on-chip stereo DAC with no phase error between channels
− Zero-cross detection for smooth volume change
− Stereo earphone driver capable of driving a 30-load
− Quiet power-on and power-off
− I2S interface for external DAC
− Separate voltages for analog, digital, I/O
− On-chip RAM for user code and data
− Serial control and data interfaces
− Can be used as a slave co-processor
− SPI flash boot for special applications
− UART for debugging purposes
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