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CS44800
目录
1.特性和规范............................................. ........................... 8
指定的运行条件............................................... ....................................... 8
绝对最大额定值............................................... .................................................. 8
DC电气特性............................................... ......................................... 9
数字接口特性............................................... .................................. 9
PWM输出性能特性.............................................. ............... 10
PWM滤波特性............................................... ............................................. 11
开关特性 - XTI .............................................. ....................................... 11
开关特性 - SYS_CLK .............................................. ............................ 12
开关特性 - PWMOUTA1 -B4 ............................................ .................... 12
开关特性 - PS_SYNC .............................................. ............................ 12
开关特性 - 戴接口............................................. .................. 13
开关特性 - 控制端口 - IC格式...................................... 14
开关特性 - 控制端口 - SPI格式..................................... 15
2.引脚说明............................................................................................................. 16
2.1 I / O引脚特性............................................ .................................................. .... 20
3.典型连接图
....................................................................... 21
4.应用..................................................................................................................... 23
4.1概述.......................................................................................................................... 23
4.2功能集概述..................................................................................................... 23
4.3时钟发生器............................................................................................................. 24
4.3.1 FSIN域时钟............................................ ............................................. 25
4.3.2 FSOUT域时钟............................................ .......................................... 25
4.4 FSIN时钟域模块............................................. ............................................... 27
4.4.1数字音频输入接口........................................... ............................................ 27
4.4.2自动速率检测............................................ .................................................. ... 31
4.4.3去加重...................................................................................................... 31
4.5 FSOUT时钟域模块............................................. ............................................ 32
4.5.1采样速率转换器............................................ .......................................... 32
4.5.2负载补偿滤波器............................................ ....................................... 32
4.5.3数字音量和静音控制.......................................... .............................. 32
4.5.4峰值检测器/限幅........................................... ................................................ 33
4.5.5 PWM引擎..................................................................................................... 33
4.5.6插值滤波器............................................. .................................................. 34
4.5.7量化............................................................................................................ 34
4.5.8调制器............................................................................................................ 34
4.5.9 PWM输出...................................................................................................... 34
4.5.10电源抑制（ PSR ）的实时反馈..................................... 35 ..
4.6控制端口的描述和时序............................................ .................................... 36
4.6.1 SPI模式............................................................................................................ 36
4.6.2 IC模式............................................................................................................. 37
4.6.3个GPIO ................................................................................................................. 38
4.6.4主机中断...................................................................................................... 38
5.电源，接地和PCB LAYOUT ........................................ ................. 39
5.1复位和供电....................................................................................................... 42
5.1.1 PWM的Popguard瞬态控制.......................................... ......................... 42
5.1.2推荐的上电顺序.......................................... ....................... 42
5.1.3推荐PSR校准过程........................................... ............ 43
5.1.4推荐断电顺序.......................................... ................... 44
6.注册快速参考............................................. ............................................. 45
7.寄存器描述.............................................. .................................................. .... 49
7.1存储器地址指针（ MAP） ........................................... ........................................... 49
DS632PP1
3
