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来这里学习Actions片子做数码音频产品 |
| 作者：华伟 栏目：ARM技术 |
COPYRIGHT © 2004 Actions SEMICONDUCTOR Co., Ltd. All rights reserved. VER 1.5 Page 4 1/14/2005 1. DESCRIPTION ATJ2085 is a SINGLE-chip for FLASH-based DIGITAL music player. It includes an AUDIO DECODER with a high performance DSP, ADPCM record capabilities and USB interface for downloading music and uploading voice recordings. ATJ2085 also provides an interface to FLASH MEMORY, LED, button and SWITCH inputs, HEADPHONE, and MICROPHONE, and FM radio input and CONTROL. ATJ2085’s programmable architecture SUPPORTs the MP3, WMA and other DIGITAL AUDIO standards. For DEVICEs like USB-Disk, ATJ2085 can act as a USB mass storage slave DEVICE to personal COMPUTER SYSTEM. Its low POWER consumption allows a LONG BATTERY life, and an efficient flexible on-chip DC-DC converter allows many different BATTERY configurations, including 1xAA, 1xAAA, 2xAA, 2xAAA and Li-Ion. Built-in Sigma-Delta DAC & a HEADPHONE driver to directly drive low impedance HEADPHONEs. The ADC includes inputs for both MICROPHONE and ANALOG AUDIO in to SUPPORT voice recording and FM radio integration features. Thus, the ATJ2085 provides a true ‘ALL-IN-ONE’ solution that is ideally suited for highly optimized DIGITAL AUDIO players with mass storage function. 2. Features MPEG1/2/2.5 AUDIO Layer 1, 2, 3 DECODER SUPPORT WMA DECODER DIGITAL Voice Recording with Actions Speech Algorithm 24 bits DSP Core with MEMORY and on-chip Debug SUPPORT Unit (DSU) Integrated 8-bit MCU with DSU External up to 2(cs) x 64M/128M/256M/512M/1G/2G bytes Nand type FLASH accessed by MCU or DMA Built-in DMA, CTC (Counter/Timer Controller) and interrupt CONTROLler for MCU Energy saving dynamic POWER management (PMU) SUPPORT USB 2.0（FS）, Write speed(Max): 955k byte/s; Read speed(Max): 1033k byte/s Build in Stereo 18-bit Sigma-Delta DAC Build in Key Scan CIRCUIT (3*3) and GPIO I²C interface SUPPORTs Master/Slave mode, with changeable slave address SUPPORT external 8080 Interface LCM driver SUPPORT FM Radio input and 32 levels volume CONTROL SUPPORT Stereo 16-bit Sigma-Delta ADC for MICROPHONE/FM Input, SAMPLE rate at ATJ2085 DATA SHEET Actions 8/12/16/22/24/32/48KHz MCU run at 24.576MHZ(TYP), up to 60MHZ SNR: 90dB (A Weight) HEADPHONE driver OUTPUT 2x11mW @16 Ohm(TYP) Operating Voltage: IO: 3.0V(TYP), Core: 2.0V(TYP) Standby Leakage Current: VCC: 35uA@3.0V(TYP) , VDD: 110uA@2.0V(TYP) Low POWER Consumption, designed for greater than 15 (TYP) hours of operation on a SINGLE BATTERY life. (<65mW at typical MP3 DECODER solution; <90mW at typical WMA DECODER solution) 64-pin (10x10mm) LQFP PACKAGE zhangjiesz@163.com |
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