AS3527
austriamicrosystems
Product Brief
© 2005-2006, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com
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1 Description
This highly flexible and fully integrated audio processor system
(AS3527) combines strong calculating power, high performance
audio features with system power management options for battery
powered devices.
Using advanced process technology and large on chip RAM unique
power management techniques leads to outstanding system level
low power consumption of 52mW for a complete flash-player during
MP3 playback.
Based on a powerful ARM9TDMI capable of performing up to
200MIPS it is suited to run MP3, AAC, WMA, OGG… decoders and
encoders and, in addition, it can perform advanced user interfaces,
motion graphics support, video playback and much more.
The AS3527 SOC (system-on-a-Chip) features dedicated high
speed interfaces for ATA IDE, USB2.0 HS-OTG and SDRAM
ensuring maximum performance for download, upload, and
playback.
Furthermore interfaces for NAND flashes, MMC/SD cards and
Memory Stick ensure most flexible system design possibilities.
Hardware support for parallel interfaces lower the CPU load serving
complex and/or colour user interfaces.
Additional SPI, Fast UARTs and configurable serial high-speed data
and control interfaces enable the addition of a number of
connectivity options, radio broadcast and communication front ends:
• Satellite radio (XM-Radio, HD-Radio, Sirius, DAB)
• BT2.0 radio front ends or complete chip sets
• WiFi chip sets
• Comm receivers (i.e. GSM, etc)
• GPS radio or complete chip set
Two independently programmable PLLs generate the required
frequencies for audio playback/recording, for the processor core and
for the USB interface at the same time. An additional external clock
input eliminates the use of external crystals when used in multi-
processor systems like mobile phones.
It has a variety of audio inputs and outputs to directly connect
electret microphones, and auxiliary signal sources via a 10-channel
mixer to a headset 16Ω/32Ω or auxiliary audio peripherals.
Selectable mixer bypasses lower the power consumption for simple
playback operations and enlarger the system design flexibility.
Further the device offers advanced power management functions.
All necessary ICs and peripherals in a Digital Audio Player with flash
or hard-disk memory are supplied by the AS3527. The different
regulated supply voltages are fully programmable. The power
management block generates 11 different supply voltages out of a
single battery supply. CPU, NAND flash, SRAM, memory cards,
harddisk, LCD, LCD back-light, USB-HOST and USB-OTG can be
powered.
The AS3527 has an independent 32kHz real time clock (RTC) on
chip, which allows a complete power down of the system CPU and
peripherals.
AS3527 also contains a charger for Li-Io batteries.
The single supply voltage may vary from 3.0V to 5.5V.
2 Key Features
2.1 Digital Core
Embedded 32-Bit RISC Controller
• ARM922TDMI RISC CPU
• 2.5Mbit on-chip RAM
• 1Mbit on chip ROM
• Clock speed max. 250MHz (200MIPS)
• Standard JTAG interface
USB 2.0 HS & OTG Interface
• Up to 480Mbit/s transfer speed
• USB 2.0 HS/FS physical inlcuding OTG support
• USB 2.0 HS/FS digital core including OTG host
• Dedicated dual port buffer RAM
• DMA bus master functionality
IDE Host Controller
• Supporting Ultra ATA 33/66/100/133 modes
• Programmable IO and Multi-word DMA capability
• Dedicated dual port buffer RAM
• DMA bus master functionality
External Memory Controller
• Dynamic memory interface
• Asynchronous static memory
• DMA bus master functionality
DMA Controller
• Single Master DMA controller
• 2 DMA channels possible at the same time
• 16 DMA requests supported
Interrupt Controller
• Support for 32 standard interrupts
• Support for 16 vectored IRQ interrupts
Audio Subsystem Interface
• Dedicated 2 wire serial control master
• I2S input and output with dual port buffer RAM
Nand Flash Interface
• 8 and 16bit flash support
• 3, 4 & 5 byte address support
• hardware ECC
Product Brie
AS3527
Advanced Audio Processor System
