Description
The AS3524 implements a highly flexible and fully integrated digital audio processor system combining strong calculating power and high performance interfaces commonly used within audio player systems.

Key Features
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

MMC/SD Interface
• MMC/SD Card host for multiple card support
• 4 data line support for SD cards

MS / MS Pro Interface
• Dedicated dual port buffer RAM

Display Interface
• Serial and parallel controller supported
• On chip hardware acceleration

Synchronous Serial Interface
• Master and slave operation
• 8 and 16 bit support
• Several protocol standards supported

I2S Interface
• Input multiplexed with audio subsystem
• selectable SPDIF input conversion
• Dedicated dual port buffer RAM

2 Wire Serial Control Interface
• Master and slave operation
• Standard and fast mode support

General Purpose IO Interface
• 4x 8-bit ports

Multiple Boot Options
• Selection of internal ROM or external boot device
• Internal boot loader supporting boot from external NorFlash, NandFlash, IDE, SPI host
• Internal USB boot loader with USB promer supporting initial factory programming and firmware update

Application
• Portable Digital Audio Player and Recorder
• Portable Digital Media Player
• PDA
• Smartphone