ADAU1781
目录
特点................................................. ............................................. 1
应用................................................. ...................................... 1
概述................................................ ......................... 1
功能框图............................................... ............... 1
修订历史................................................ ............................... 3
规格................................................. .................................... 4
纪录端性能规格................................... 4
输出端性能规格................................... 6
电源规格............................................... ......... 8
典型的电源管理测量............................. 9
数字滤波器................................................ ................................. 9
数字输入/输出规格......................................... 10
数字时序规范............................................... .... 11
绝对最大额定值............................................... ........... 14
热阻................................................ .................... 14
ESD注意事项................................................ ................................ 14
引脚配置和功能描述........................... 15
典型性能特征........................................... 17
系统结构图............................................... .................. 20
工作原理............................................... ....................... 24
启动，初始化和电源............................................ ..... 25
上电排序.............................................. ..................... 25
时钟产生和管理........................................ 26
使数字电源，以功能子系统................ 26
设置SigmaDSP内核............................................. ... 26
节电模式............................................... ............. 26
断电顺序.............................................. ................ 26
时钟和采样率.............................................. ......... 27
核心时钟................................................ ................................... 27
采样率................................................ ............................ 27
PLL ................................................. .............................................. 28
记录信号路径............................................... ........................... 30
输入信号路径............................................... ......................... 30
模拟 - 数字转换器............................................ ....... 31
播放信号路径............................................... ....................... 32
输出信号路径............................................... .................... 32
数字 - 模拟转换器............................................ ....... 32
线路输出................................................ ............................... 32
扬声器输出................................................ ........................... 32
控制端口................................................ ................................... 33
I
2
端口C ................................................ ........................................ 33
SPI端口................................................ ........................................ 36
内存和寄存器访问.............................................. ...... 36
串行数据输入/输出端口............................................ ........ 38
TDM模式................................................ ................................ 38
通用输入/输出............................................ ...... 40
DSP核心................................................ ......................................... 41
信号处理................................................ ........................ 41
建筑................................................. ............................... 41
程序计数器................................................ ....................... 41
功能................................................. ....................................... 41
数字格式................................................ ....................... 42
编程................................................. ............................. 42
程序RAM ，参数RAM和数据RAM ..................... 44
程序RAM ................................................ ............................ 44
参数RAM ................................................ .......................... 44
数据RAM ................................................ ................................... 44
读/写数据格式............................................. ............ 44
软件安全加载................................................ ....................... 45
软件摆................................................ .............................. 46
应用信息................................................ .............. 47
电源旁路电容.............................................. 47
GSM噪声滤波器............................................... ......................... 47
接地................................................. .................................. 47
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