參數(shù)資料
型號: ATJ2085
廠商: Electronic Theatre Controls, Inc.
英文描述: ATJ2085 is a single-chip for flash-based digital music player
中文描述: ATJ2085是一種單芯片基于閃存的數(shù)字音樂播放器
文件頁數(shù): 14/35頁
文件大?。?/td> 609K
代理商: ATJ2085
ATJ2085 DATA SHEET Actions
Copyright 2004 Actions Semiconductor Co., Ltd. All rights reserved.
VER 1.5
Page 13
8/18/2004
4.6 RTC/CTC/Watch Dog Timer
RTC is a 24-bit counter with the following function:
Time
Alarm
Timer
CTC is a counter whose clock source is different with RTC’s.
Watchdog can be set from 176-milisecond to 180-second with different step.
4.7 Oscillator/PLL
ATJ2085 supports 24.576MHz crystal, which is the system clock source.
A low jitter PLL referenced to 24.576MHz is used to generate clock for DSP and for serial
communication protocols such as USB, UART, etc. The clock used in serial communications is
48MHz so the PLL generates frequency at multiple of 48MHz to support DSP and serial
communication simultaneously. Another PLL referenced to 24.576MHz is used to generate
22.5792MHz for sample rate 44.1K/22.05KHz/11.025KHz.
WWW.MP3JS.COM.CN
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