DATA SHEET
MAS 35x9F
1.3. Application Overview
The following block diagram shows an example appli-
cation for the MAS 35x9F in a portable audio player
device. Besides a simple controller and the external
flash memories, all required components are inte-
grated in the MAS 35x9F. The MAS 35x9F supports
both speech and radio quality audio encoding, as well
as compressed-audio decoding tasks.
Fig. 1–1 depicts a portable power-optimized audio
application. The two embedded DC/DC converters of
the MAS 35x9F generate optimum power supply volt-
ages for the DSP core and also for state-of-the art
flash memories that typically require 2.7 to 3.3 V sup-
ply. The performance of the DC/DC converters
reaches efficiencies of up to 95%.
Portable Digital Music Player
MAS 35x9F
optional
line in
Audio
baseband
features
D/A
A/D
DSP Core
MP3
AAC
G.729
Microphone
amplifier
Headphone
Headphone
amplifier
Volume
Optional
SC4
optional
digital in
Downloads
digital out
S/PDIF and serial
S/PDIF
or
serial
Crystal
Osc./PLL
Battery
Voltage
Monitor
2
I C
DC/DC1
DC/DC2
System clock
e.g. 2.2 V e.g. 3.0 V
e.g. 1.0 V
2
I C
Display
µC
Keyboard
PC Connector
Fig. 1–1: Example of an application for the MAS 35x9F in a portable audio player device
Micronas
June 30, 2004; 6251-505-1DS
7
MICRONAS [ MICRONAS ]
