Rev. 7524AMP307/05
Features
·
MPEG I/II-Layer 3 Hardwired Decoder
Stand-alone MP3 Decoder
48, 44.1, 32, 24, 22.05, 16 kHz Sampling Frequency
Separated Digital Volume Control on Left and Right Channels (Software Control
using 31 Steps)
Bass, Medium, and Treble Control (31 Steps)
Bass Boost Sound Effect
Ancillary Data Extraction
CRC Error and MPEG Frame Synchronization Indicators
·
20-bit Stereo Audio DAC
93 dB SNR Playback Stereo Channel
32 Ohm/ 20 mW Stereo Headset Drivers
Stereo Line Level Input, Differential Mono Auxiliary Input
·
Programmable Audio Output for Interfacing with External Audio System
I
2
S Format Compatible
·
Mono Audio Power Amplifier
440mW on 8 Ohms Load
·
USB Rev 1.1 Controller
Full Speed Data Transmission
·
Built-in PLL
MP3 Audio Clocks
USB Clock
·
MultiMediaCard
®
Interface, Secure Digital Card Interface
·
Standard Full Duplex UART with Baud Rate Generator
·
Power Management
Power-on Reset
Idle Mode, Power-down Mode
·
Operating Conditions:
2.7 to 3V,
±10%, 25 mA Typical Operating at 25°C
37 mA Typical Operating at 25°C Playing Music on Earphone
Temperature Range: -40
°C to +85°C
Power Amplifier Supply 3.2V to 5.5V
·
Packages
CTBGA 100-pin
Typical
Applications
·
MP3-Player
·
PDA, Camera, Mobile Phone MP3
·
Car Audio/Multimedia MP3
·
Home Audio/Multimedia MP3
·
Toys
·
Industrial Background Music / Ads
Single-Chip MP3
Decoder with
Full Audio
Interface
AT83SND2CMP3
Preliminary
2
AT83SND2CMP3
7524AMP307/05
Description
The AT83SND2CMP3 has been developped as a versatile remote controlled MP3
player for very fast MP3 feature implementation into most existing system. It perfectly
fits features needed in mobile phones and toys, but can also be used in any portable
equipment and in industrial applications.
Audio files and any other data can be stored in a Nand Flash memory or in a removable
Flash card such as MultiMediaCard (MMC) or Secure Digital Card (SD). Music collec-
tions are very easy to build, as data can be stored using the standard FAT12/16 and
FAT32 file system.
Thanks to the USB port, data can be transferred and maintained from and to any com-
puter based on Windows
®
, Linux
®
and Mac OS
®
.
File system is controlled by the AT83SND2CMP3 so the host controller does not have to
handle it.
In addition to the USB device port, the MP3 audio system can be connected to any
embedded host through a low cost serial link UART. Host controller can fully remote
control the MP3 decoder behaviour using a command protocol over the serial link.
File system is controlled by the AT83SND2CMP3 so host controller does not have to
handle it.
Files can also be uploaded or dowloaded from host environment to NAND Flash or
Flash Card.
5
AT83SND2CMP3
7524AMP307/05
Signals
All the AT83SND2CMP3 signals are detailed by functionality in following tables.
Table 1. Ports Signal Description
Table 2. Clock Signal Description
Table 3. Timer 0 and Timer 1 Signal Description
Signal
Name
Type
Description
Alternate
Function
P0.7:0
I/O
Port 0
P0 is an 8-bit open-drain bidirectional I/O port. Port 0 pins that have 1s
written to them float and can be used as high impedance inputs. To
avoid any parasitic current consumption, floating P0 inputs must be
polarized to V
DD
or V
SS
.
AD7:0
P2.7:0
I/O
Port 2
P2 is an 8-bit bidirectional I/O port with internal pull-ups.
A15:8
P3.7:0
I/O
Port 3
P3 is an 8-bit bidirectional I/O port with internal pull-ups.
RXD
TXD
INT0
INT1
T0
T1
WR
RD
P4.3:0
I/O
Port 4
P4 is an 8-bit bidirectional I/O port with internal pull-ups.
Signal
Name
Type
Description
Alternate
Function
X1
I
Input to the on-chip inverting oscillator amplifier
To use the internal oscillator, a crystal/resonator circuit is connected to
this pin. If an external oscillator is used, its output is connected to this
pin. X1 is the clock source for internal timing.
-
X2
O
Output of the on-chip inverting oscillator amplifier
To use the internal oscillator, a crystal/resonator circuit is connected to
this pin. If an external oscillator is used, leave X2 unconnected.
-
FILT
I
PLL Low Pass Filter input
FILT receives the RC network of the PLL low pass filter.
-
Signal
Name
Type
Description
Alternate
Function
INT0
I
Timer 0 Gate Input
INT0 serves as external run control for timer 0, when selected by
GATE0 bit in TCON register.
External Interrupt 0
INT0 input sets IE0 in the TCON register. If bit IT0 in this register is set,
bit IE0 is set by a falling edge on INT0#. If bit IT0 is cleared, bit IE0 is
set by a low level on INT0#.
P3.2
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