DS21Q55四路T1 / E1 / J1收发器

表中的数字

图1-1 。框图..........................................................................................................................................14

图1-2 。接收和发送LIU........................................................................................................................15

图1-3 。接收和发送Framer/HDLC.......................................................................................................16

图1-4 。背板Interface..................................................................................................................................17

图2-1 。 DS21Q55引脚图， 27毫米BGA ....................................................................................................35

图5-1 。编程序列..........................................................................................................................45

图6-1 。时钟地图................................................................................................................................................49

图14-1 。简化框图接收信令路径............................................ ........................................... 87

图14-2 。的发射信号路径简图............................................ .......................................... 93

图18-1 。 CRC- 4重新计算的方法.................................................................................................................113

图22-1 。典型监测中的应用..................................................................................................................148

图22-2 。 CMI编码..........................................................................................................................................150

图22-3 。基本Interface......................................................................................................................................160

图22-4 。受保护的接口使用内部接收终端............................................ ......................... 161

图22-5 。 E1发送脉冲Template................................................................................................................163

图22-6 。 T1发射脉冲模板................................................................................................................163

图22-7 。抖动Tolerance.....................................................................................................................................164

图22-8 。抖动容限（ E1 Mode)...................................................................................................................164

图22-9 。抖动衰减（ T1 Mode).................................................................................................................165

图22-10 。抖动衰减（ E1模式） ..............................................................................................................165

图24-1 。 BERT的网络化方向简图........................................... .................................... 174

图24-2 。 BERT在背板方向简图........................................... ................................ 174

图26-1 。 IBO例........................................................................................................................................189

图27-1 。两个ESIB集团DS21Q55s............................................................................................................190

图30-1 。 JTAG功能框图..........................................................................................................198

图30-2 。 TAP控制器状态Diagram..............................................................................................................201

图31-1 。接收端定时D4 ......................................................................................................................207

图31-2 。接收端定时ESF ....................................................................................................................207

图31-3 。接收端边界定时（有弹力商店禁用） ....................................... ........................ 208

图31-4 。接收端1.544MHz边界时序（弹性商店启用） ..................................... ........ 208

图31-5 。接收端2.048MHz的边界时序（弹性商店启用） ..................................... ........ 209

图31-6 。发送方的D4时序.....................................................................................................................209

图31-7 。发送方的ESF时间...................................................................................................................210

图31-8 。发送方的边界时序（弹性商店禁用） ....................................... ..................... 210

图31-9 。发送方的1.544MHz边界时序（弹性商店启用） ..................................... ....... 211

图31-10 。发送方的2.048MHz的边界时序（弹性商店启用） ..................................... ..... 211

图31-11 。接收端定时..........................................................................................................................212

图31-12 。接收端边界时序（弹性商店禁用） ....................................... .................... 212

图31-13 。接收端边界时序， RSYSCLK = 1.544MHz （弹性商店启用） ............................ 213

图31-14 。接收端边界时序， RSYSCLK = 2.048MHz的（弹性商店启用） ............................ 213

图31-15 。获得IBO通道交错模式时序............................................ ...................................... 214

图31-16 。获得IBO帧交错模式时序............................................ ......................................... 215

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