DS2148/Q48
目录
5.硬件模式......................................................................................................................... 22
5.1寄存器映射.......................................................................................................................... 23
5.2并行端口OPERATION................................................................................................ 24
5.3串行端口操作...................................................................................................... 24
6.控制REGISTERS.................................................................................................................... 28
6.1设备上电和复位........................................... ................................................. 31
7状态寄存器....................................................................................................................... 34
8.诊断.................................................................................................................................. 39
8.1带内循环代码生成和检测......................................... .......... 39
8.2环回............................................................................................................................... 43
8.2.1远程回环(RLB)......................................................................................................... 43
8.2.2本地回环(LLB)............................................................................................................ 43
8.2.3模拟环回（ LLB ） ......................................................................................................... 44
8.2.4双回送（ DLB ） ............................................................................................................ 44
8.3 PRBS生成和检测............................................. .................................... 44
8.4 ERROR COUNTER...................................................................................................................... 44
8.4.1错误计数器更新............................................................................................................ 45
8.5 ERROR INSERTION.................................................................................................................... 45
9.模拟接口..................................................................................................................... 46
9.1接收器.................................................................................................................................... 46
9.2发送器........................................................................................................................... 47
9.3抖动衰减器.............................................................................................................. 47
9.4 G.703同步信号............................................ .......................................... 48
10. DS21Q48 QUAD LIU......................................................................................................................... 56
11. DC CHARACTERISTICS.................................................................................................................. 60
12.交流CHARACTERISTICS.................................................................................................................. 62
13.机械DIMENSIONS......................................................................................................... 71
13.1外形尺寸，四通道版本............................................ ..................... 73
3 75
DALLAS [ DALLAS SEMICONDUCTOR ]
