參數(shù)資料
型號(hào): 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(lè)播放器
文件頁(yè)數(shù): 18/35頁(yè)
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 17
8/18/2004
4.11 Headphone Driver
The output power of ATJ2085’s amplifier is 13mW(each channel).
4.12 Key Scan Interface
When key scan circuit is enabled, ATJ2085 will scan the keyboard periodically. It drives pin Key
out N scan pulse in turn. When any key is pressed, the corresponding Key out N will send out the
scan pulse. When a key is pressed, pin Key in N connecting the key will be found low level.
There are 12 internal 8-bit registers for key value latch per scan. But only another one register
(Key Scan Data Register) for MCU may access key value. Those 12 internal registers are
mapped into this register, and an internal pointer is used to point to the current register to return
scan data when read. Any IO write to this register will clear the internal register, and the pointer
will increase by 1 and point to the next register after read is performed.
4.13 External Memory Interface
ATJ2085 can support NAND type flash from 32M to 1G bytes.
WWW.MP3JS.COM.CN
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