Integrated Mixed-Signal Solutions
P R O D U C T B R I E F
STMP3400
Audio Decoder with USB Interface
and Voice Record
FEATURES
MP3 decode
NAND Flash, SmartMedia, MMC, Secure Digital,
CompactFlash, and IDE Support
Designed for up to 20 hour operation from AA
battery, as well as other battery options
USB download interface
LCD Interface
GPIO and button I/O controls
Voice record in ADPCM format
Volume control on record and playback
Full analog mixer configuration
Drive headphones directly
High performance 18-bit
technology
LINE-to-LINE SNR >95 dB
USB download drivers
Interface to a host chip/processor
Upgradeable firmware
DSP maximum speed is 50 MHz
Supports SDMI
Energy saving dynamic power management
Bass and Treble control; configurable multiple
band control
FM radio input and control support
Three analog line-level inputs: Line_In, FM_In,
and Mic
100-pin LQFP
Crystal rate is 24.576 MHz
DESCRIPTION
SigmaTel's STMP3400 is a single-chip digital music
system for dedicated audio players, PDAs and cell
phones. It includes an audio decoder with a high per-
formance DSP, ADPCM record capabilities and a USB
interface for downloading music and uploading voice
recordings. STMP3400 also provides an interface to
flash memory, LCD, button and switch inputs, head-
phones, microphone and FM radio input and control.
The STMP3400's programmable architecture supports
the MP3 digital audio standard. The end-user can
update software on through USB. For devices like
PDAs and cell phones, STMP3400 can act as a slave
chip to a host chip/processor. The STMP3400 has low
power consumption to allow long battery life with a AA
or AAA battery. The
DACs include a head-
phone driver to directly
drive low impedance
headphones. The ADCs
include inputs for both
Microphone and Analog
Audio In to support voice
recording and FM radio.
SigmaTel's proprietary
Sigma-Delta (
)
tech-
nology achieves a DAC
SNR in excess of 95 dB.
The STMP3400 is com-
pliant with Phase 1 of the
Secure Digital Music Ini-
tiative (SDMI).
5-3400-P1-1.0-1201
Host Processor
(Optional)
FM Tuner
(Optional)
Microphone
Voice Record
Flash Memory
Buttons/Switches
Headphones
Battery
LDC Screen
90
94
98
102
106
STMP3400
2
5-3400-P1-1.0-1201
STMP3400
Audio Decoder with USB Interface and Voice Record
ORDERING INFORMATION
KEY SPECIFICATIONS
MP3 decoding algorithm support
Upgradeable firmware
Memory support - NAND, SmartMedia, Secure Digital, MMC, CompactFlash, IDE, and NOR
Power consumption:
AA battery up to 20 hours
Other battery options are available
< 200 mW during playback (including Flash, LCD, Headphone, and DSP)
Voice record capability with compression
Level of integration with implementation flexibility
Act as host chip on a device or as a slave chip to a host processor
Part Number
Package
Temp Range
Supply Range
STMP3400
100-pin LQFP 16mm x 16mm x 1.6mm 0 C to +70 C
AVdd = 2.02.75V, DVdd = 2.02.75V,
IO
Vdd = 2.73.3V
SPI
M
U
X
Memory
Interface,
SPI
Timers and
Interrupts
Flash
Memory
USB
Interface
LCD
Interface
GPIO
Control
I2C,I2S
LCD
Display
FM
Tuner
LINE_IN
MIC_IN
AMP
FM_IN
I2C
High
Performance
DSP
Crystal &
DC-DC
Converter
USB
STMP3400
To Buttons
&Controls
XTAL
ROM
RAM
Smart
Media
Memory
DAC
ADC
M
U
X
Headphone/
LINE_OUT
LINE
Mixer
Compact-
Flash
Memory
MMC
Memory
Secure
Digital
Memory
or
or
or
F
I
F
O
M
U
X
IDE
Memory
or
I2S
LCD, I2S, SPI,
I2C, and GPIO
used for host
chip interface
RAM size:
40K x 24-bit
ROM size:
4K x 24-bit
STMP3400 DIAGRAM
Copyright 2001 SigmaTel, Inc. All rights reserved.
All contents of this document are protected by copyright law and may not be reproduced without the express written consent of SigmaTel, Inc.
MPEG Layer 3 audio coding technology licensed from FraunhoferIIS and THOMSON multimedia.
SigmaTel, the SigmaTel logo, and combinations thereof are trademarks of SigmaTel, Inc. Other product names used in this publication are
for identification purposes only and may be trademarks or registered trademarks of their respective companies. The contents of this docu-
ment are provided in connection with SigmaTel, Inc. products. SigmaTel, Inc. has made best efforts to ensure that the information contained
herein is accurate and reliable. However, SigmaTel, Inc. makes no warranties, express or implied, as to the accuracy or completeness of
the contents of this publication and is providing this publication "AS IS". SigmaTel, Inc. reserves the right to make changes to specifications
and product descriptions at any time without notice, and to discontinue or make changes to its products at any time without notice. SigmaTel,
Inc. does not assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability,
including without limitation special, consequential, or incidential damages.
5-3400-P1-1.0-1201
3
STMP3400
Audio Decoder with USB Interface and Voice Record
MEMORY SUPPORT
Maximum size of each memory device:
SmartMedia or NAND Flash: 256 MB
CompactFlash: 1 GB
MMC, Secure Digital: 256 MB
IDE: no maximum
STMP3400 AND SDMI 1.0 COMPLIANCE
Recording capabilities restricted to mono voice-grade
Playback and seek only occurs at "normal speeds"
Save a unique ID number to on-board or external flash with a minimum length of
128 bits, if randomly assigned or
32 bits, if uniquely assigned by an appropriate assignment authority or licensor designated by SDMI
Note: A software upgrade will be available to upgrade to SDMI 2.0 after the specification has been finalized.
PACKAGE TYPE
SOFTWARE DETAILS
Software Included with STMP3400:
System software distributed as source code
Decoders distributed as object code
USB Driver Software for the host PC
DEVELOPMENT TOOLS INCLUDED
56K DSP design tools from Tasking which include assembler, compiler, linker, debugger, and simulator.
SigmaTel library of functions, including DAC and ADC driver, memory and LCD control, and voice recording
Command converter hardware to download code to STMP3400 for debug
Example Programs
PROGRAM CODE
Flash System is based on FAT 12. Future versions will be based on FAT 16, FAT 32 and ISO 9660 for CDROMs.
Amount of off-chip memory required for program code is 83 kbytes185 kbytes depending on functionality. Addi-
tional program space, which varies from application to application, will be required for bitmap, text, and menu
files required for the LCD.
ADDITIONAL SUPPORT
Additional product and company information can be obtained by going to the SigmaTel website at:
www.sigmatel.com
D
D1
E
E1
D = 16 mm
D1 = 14 mm
E = 16 mm
E1 = 14 mm
100 LQFP
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