【DS21Q50四路E1收发器www.dalsemi.com初步特点§§§§§§§§§§§§§§4完整】,IC型号DS21Q50N,DS21Q50N PDF资料,DS21Q50N经销商,ic,电子元器件-51电子网

DS21Q50

四路E1收发器

www.dalsemi.com

初步

特点

4完整的E1 （ CEPT ） PCM - 30 / ISDN -PRI

收发器

长途和短途线路接口

32位或128位晶体抖动衰减器

帧FAS ， CAS ， CCS和CRC4格式

4/8 / 16MHz的时钟合成器

自动源灵活的系统时钟

时钟源的切换损失

在接收两帧弹性缓存滑动缓冲器

SIDE

交错PCM总线运行在高达16.384MHz的

可配置的并行和串行端口操作

检测并产生远端和AIS告警

完全独立的发送和接收功能

四个独立的环回功能

PRBS生成/检测/错误计数

3.3V低功耗CMOS

100-PIN

LQFP

100

订购信息

DS21Q50L ：

100引脚LQFP 14毫米（ 0

C至70

DS21Q50LN ：

100引脚LQFP 14毫米（ -40

C至85

大型计数器和双相代码

违规， CRC4码字错误， FAS

字错误和E位

8个附加的用户可配置的输出引脚。

100引脚LQFP封装（ 14毫米）

描述

该DS21Q50 E1的四收发包含所有用于连接到4 E1线路所必需的功能。该

板载时钟/数据恢复电路将AMI / HDB3 E1波形的NRZ串行数据流。该

DS21Q50自动调整到E1 22AWG （0.6 MM）双绞线电缆从0到2公里内的长度。该

设备可以生成必要的G.703波形为75欧姆同轴电缆和120欧姆双绞线电缆。

板载抖动衰减器（选择为32位或128位）可以被放置在任一所述发射或

接收数据的路径。成帧器定位帧和复帧边界，并监视数据流

警报。该装置包括一组内部寄存器，该用户可以访问和控制的操作

单元通过并行控制端口或串行端口。该器件完全符合所有最新的E1规范，包括

ITU-T G.703 ， G.704 ， G.706 ， G.823 ， G.732和I.431 ， ETS 300 011 ， 300 233 ， 300和166 ，以及

CTR12和CTR4 。

分页： 99 1

051401

DS21Q50

FEATURES.........................................................................................................................1

订购信息................................................ ......................................... 1

描述..................................................................................................................1

1.图目录.....................................................................................................4

2.列出表.......................................................................................................5

3.简介.......................................................................................................6

4.功能说明.............................................. .................................. 6

4.1

文档版本历史............................................... ...................... 7

5. PIN DESCRIPTION....................................................................................................9

5.1引脚功能说明.............................................. .......................... 15

5.1.1系统（背板）接口引脚......................................... ....................... 15

5.1.2备用抖动衰减器............................................ ................................ 16

5.1.3时钟Synthesizer...........................................................................................16

5.1.4并行端口控制引脚........................................... .................................. 17

5.1.5串口控制引脚........................................... ..................................... 18

5.1.6线接口引脚............................................ ............................................. 19

5.1.7供应Pins.....................................................................................................20

6.主机接口............................................. ......................................... 21

6.1

6.2

6.3

ARALLEL

ORT

PERATION

.................................................................................21

ERIAL

ORT

PERATION

......................................................................................21

注册MAP...................................................................................................24

7.控制，标识和测试寄存器......................................... .................... 25

7.1

7.2

7.3

7.4

7.5

OWER

–U

EQUENCE

...........................................................................................26

RAMER

OOPBACK

...............................................................................................29

UTOMATIC

LARM

eneration

........................................................................31

EMOTE

OOPBACK

...............................................................................................32

OCAL

OOPBACK

.................................................................................................32

8.状态和信息寄存器............................................ .......... 35

8.1

CRC4 S

YNC

OUNTER

...........................................................................................37

9.错误计数寄存器............................................. ................................... 43

9.1

9.2

9.3

9.4

BPV

ODE

IOLATION

OUNTER

.....................................................................43

CRC4 ê

RROR

OUNTER

.........................................................................................44

E- B

/ PRBS B

RROR

OUNTER

......................................................................45

FAS ê

RROR

OUNTER

...........................................................................................46

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DS21Q50

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

DS0监控功能............................................... ......................... 47

PRBS生成&检测.............................................. ................. 51

系统时钟接口............................................... ............................ 52

发送时钟源............................................... ............................. 55

IDLE代码插入............................................... ..................................... 56

每通道环回............................................. ................................ 57

弹性存储操作............................................... ........................... 58

附加（ SA ）和国际（ SI ）位操作............ 58

用户配置输出............................................... .................... 63

线路接口单元............................................... ...................................... 66

19.1 R

ECEIVE

LOCK

ATA

ECOVERY

..................................................................67

19.1.1 Termination....................................................................................................68

19.2 T

RANSMIT

AVESHAPING

INE

分料

.......................................................68

19.3 J

伊特尔

TTENUATORS

............................................................................................72

19.3.1时钟和数据抖动衰减器.......................................... ...................... 72

19.3.2非专用时钟抖动衰减器........................................... ................. 72

20.

21.

22.

CMI （代码标记反转） ............................................ ......................... 74

交错PCM总线操作.............................................. ............ 76

功能时序图............................................... ................. 79

22.1 R

ECEIVE

.................................................................................................................79

22.2 T

RANSMIT

.............................................................................................................81

23.

24.

操作参数................................................ ............................. 85

AC时序参数和图表............................................. 0.86

ULTIPLEXED

AC - C

极特

............................................................86

-M

ULTIPLEXED

AC - C

极特

...................................................89

ERIAL

ORT

..........................................................................................................92

ECEIVE

AC - C

极特

.............................................................................93

RANSMIT

AC - C

极特

.........................................................................96

PECIAL

副执行秘书办公室

AC - C

极特

................................................................98

24.1

24.2

24.3

24.4

24.5

24.6

25.

26.

力学描述 - 100引脚LQFP封装............................................ 0.99

力学描述 - 12MM CSBGA （初步） ........... 99

第99 3

DS21Q50

1.图目录

图1-1 DS21Q50 QUAD TRANSCEIVER............................................................................................. 8

图3-1串行口工作方式1 ......................................... .......................................... 21

图3-2串行口工作方式2 ......................................... .......................................... 22

图3-3串行口工作方式3 ......................................... .......................................... 23

图3-4串行口工作方式4 ......................................... .......................................... 23

图16-1外部模拟连接（基本配置） ............................. 69

图16-2外部模拟连接（保护的接口） ............................. 70

图16-3发送波形模板........................................... .................................... 71

图16-4抖动容限............................................................................................................ 73

图16-5抖动ATTENUATION........................................................................................................ 73

图17-1 CMI CODING ........................................................................................................................ 75

图17-2例CMI码违例（ CV ）的...................................... .............................. 75

图18-1 IBO配置使用2 DS21Q50收发器（ 8条E1线路） ...................... 78

图19-1接收帧和多帧时序......................................... ...................... 79

图19-2接收边界时序（有弹力商店禁用） ..................................... ........... 79

图19-3接收边界时序（启用弹性店） ..................................... ............ 79

图19-4接收交错的总线操作.......................................... .............................. 80

图19-5发送帧和多帧时序......................................... ................... 81

图19-6 TRANSMIT边界时序........................................... ............................................ 81

图19-7 TRANSMIT交叉总线操作.......................................... .......................... 82

图19-8 DS21Q50 FRAMER同步流程图.......................................... ...... 83

图19-9 DS21Q50传输数据流.......................................... .......................................... 84

图21-1 INTEL总线读AC时序（ BTS = 0 / MUX = 1 ） ................................ ........................... 87

图21-2 INTEL总线写入时序（ BTS = 0 / MUX = 1 ） ................................. ................................. 87

图21-3 Motorola总线AC时序（ BTS = 1 / MUX = 1 ） ................................. ........................ 88

图21-4 INTEL总线读时序（ BTS = 0 / MUX = 0 ） ................................. ................................... 90

图21-5 INTEL总线写入时序（ BTS = 0 / MUX = 0 ） ................................. ................................. 90

图21-6 Motorola总线读时序（ BTS = 1 / MUX = 0 ） ................................. ....................... 91

图21-7 MOTOROLA总线写入时序（ BTS = 1 / MUX = 0 ） ................................. ...................... 91

图21-8串行总线时序（ BIS1 = 1 ， BIS0 = 0 ） ................................. ........................................ 92

图21-9接收AC时序（禁止接收弹性商店） ..................................... ...................... 94

图21-10接收AC时序（接收弹性商店启用） ..................................... ..................... 95

图21-11 TRANSMIT AC时序（ IBO禁用） ....................................... ...................................... 97

图21-12 TRANSMIT AC时序（ IBO启用） ....................................... ....................................... 97

图21-13 NRZ输入交流TIMING..................................................................................................... 98

第99 4

DS21Q50

2.列出表

表5-1针表（按功能） ............................................................................................................ 9

表5-2针表（通过引脚LQFP数） ...................................... .................................................. .. 12

表5-3 CSBGA球分配............................................................................................................. 15

表6-1总线模式选择................................................................................................................ 21

表6-2寄存器映射按地址排序......................................... ...................................... 24

表7-1 SYNC / RESYNC CRITERIA...................................................................................................... 27

表8-1报警CRITERIA................................................................................................................... 38

表11-1 TRANSMIT PRBS模式选择.......................................... .............................................. 51

表11-2接收PRBS模式选择.......................................... ................................................. 52

表12-1主端口SELECTION................................................................................................. 54

表12-2合成器的输出选择........................................... ............................................. 54

表18-1 OUTA和OUTB功能选择......................................... .................................... 64

表19-1 LINE打造出选择LICR ........................................ ............................................. 68

表19-2互感器规格............................................ ........................................ 69

表21-1 IBO设备分配........................................... .................................................. .... 77

表21-2 IBO系统时钟选择.......................................... .................................................. 77

第99 5