DS26521

单一的T1 / E1 / J1收发器

www.maxim-ic.com

概述

该DS26521是一个单信道成帧器和线路

对于T1 ，E1和J1接口单元（ LIU）的组合

应用程序。每个通道都是独立

配置，并支持长途和短途

线。

特点

完整的T1 ，E1或J1远程/短程

收发器（LIU加成帧器）

内部软件选择发送和

接收端的用于100Ω T1双绞线

对， 110Ω J1双绞线， 120Ω E1双绞线

对， 75Ω同轴电缆

晶振的抖动衰减器可以选择

用于发送或接收通道;抖动衰减器

符合ETS CTR 12/13 ， ITU -T G.736 ， G.742 ，

G.823和AT&T酒吧62411

外部主时钟可以是多个的

为2.048MHz或1.544MHz为T1 / J1或E1

操作;该时钟由内部适用于

在主机模式的T1或E1

接收信号电平指示从-2.5dB到

-36dB在T1模式和-2.5dB至-44dB的E1

模式近似2.5分贝增量

发送开路和短路检测

刘在LOS按照G.775 ， ETS 300

233 ，和T1.231

发射同步

灵活的信号提取与插入

无论使用的系统接口或

微处理器端口

报警检测与插入

T1成帧格式的D4 ， SLC -96与ESF

J1支持

E1 G.704和CRC- 4复

应用

路由器

信道服务单元（个CSU ）

数据服务单元（DSU ）

多路复用器

开关

海峡银行

T1 / E1测试设备

工作原理图

DS26521

T1/E1/J1

网

T1/J1/E1

收发器

背板

TDM

订购信息

部分

DS26521LN

DS26521LN+

温度范围

-40 ° C至+ 85°C

-40 ° C至+ 85°C

PIN- PACKAGE

64 LQFP

64 LQFP

通过8位并行接口或控制

串行外设接口（SPI ）

产品特点继续第

2.

+表示无铅/符合RoHS标准的设备。

注意：

该器件的一些修订可能偏离称为勘误表公布的规格。任何器件的多个版本

可能同时获得通过不同的销售渠道。欲了解器件勘误表的信息，请点击这里：

www.maxim-ic.com/errata 。

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REV ： 111606

DS26521单T1 / E1 / J1收发器

目录

1.

1.1

详细说明................................................ ............................................... 9

M

AJOR

O

操作摄像机

M

副执行秘书办公室

.............................................................................................................9

2.

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

2.10

功能亮点................................................ ................................................ 10

G

ENERAL

......................................................................................................................................10

L

INE

I

覆盖整个院落

............................................................................................................................10

C

LOCK

S

YNTHESIZER

....................................................................................................................10

J

伊特尔

A

TTENUATOR

.....................................................................................................................10

F

RAMER

/F

ORMATTER

....................................................................................................................10

S

变体系

I

覆盖整个院落

......................................................................................................................11

HDLC

ONTROLLERS

...................................................................................................................12

T

EST和

D

IAGNOSTICS

................................................................................................................12

M

ICROCONTROLLER

P

ARALLEL

P

ORT

.............................................................................................12

S

LAVE

S

ERIAL

P

ERIPHERAL

I

覆盖整个院落

（SPI ）的F

EATURES

............................................................12

3.

4.

5.

6.

7.

7.1

APPLICATIONS..............................................................................................................13

规范标准................................................ ................................. 14

缩写词和术语............................................... ....................................... 16

框图.......................................................................................................17

引脚说明......................................................................................................19

P

IN

F

UNCTIONAL

D

ESCRIPTION

......................................................................................................19

8.

8.1

功能DESCRIPTION........................................................................................25

M

ICROPROCESSOR

I

覆盖整个院落

......................................................................................................25

并口Mode................................................................................................................................ 25

SPI串行端口Mode............................................................................................................................ 25

SPI功能时序图......................................................................................................... 25

背板时钟发生器............................................................................................................... 28

8.1.1

8.1.2

8.1.3

8.2

8.3

8.4

8.5

8.6

8.7

8.8

C

LOCK

S

TRUCTURE

.......................................................................................................................28

R

ESETS和

P

OWER

-D

OWN

M

副执行秘书办公室

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

I

NITIALIZATION和

C

ONFIGURATION

..............................................................................................30

比如设备初始化序列.............................................. ................................................ 30

8.2.1

8.4.1

G

叶形

R

物资跟不上

....................................................................................................................30

P

ORT

R

物资跟不上

........................................................................................................................30

D

EVICE

I

NTERRUPTS

.....................................................................................................................30

S

变体系

B

无源底板

I

覆盖整个院落

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

弹性商店....................................................................................................................................... 32

IBO Multiplexer..................................................................................................................................... 35

H.100 （ CT总线）兼容.............................................................................................................. 36

接收和发送通道阻塞寄存器............................................ ................................. 37

分数传输支持（间隙时钟模式） .......................................... .................................. 37

接收分数支持（间隙时钟模式） .......................................... ................................... 37

T1 Framing........................................................................................................................................... 38

E1 Framing........................................................................................................................................... 41

T1发射同步.................................................................................................................... 43

信号.............................................................................................................................................. 44

T1数据Link......................................................................................................................................... 48

E1数据Link......................................................................................................................................... 50

维护和报警..................................................................................................................... 51

2 258

8.8.1

8.8.2

8.8.3

8.8.4

8.8.5

8.8.6

8.9

F

RAMERS

......................................................................................................................................38

8.9.1

8.9.2

8.9.3

8.9.4

8.9.5

8.9.6

8.9.7

DS26521单T1 / E1 / J1收发器

8.9.8

8.9.9

8.9.10

8.9.11

8.9.12

8.9.13

8.9.14

8.9.15

8.9.16

8.9.17

E1自动生成报警.......................................................................................................... 54

错误计数寄存器.......................................................................................................................... 55

DS0监控Function...................................................................................................................... 57

传输每信道空闲代码插入........................................... ................................................ 58

收到每通道空闲码Insertion............................................................................................ 58

每通道环回........................................................................................................................ 58

E1 G.706中级CRC- 4更新（仅E1模式） .................................... ............................... 58

T1可编程带内环路代码生成.......................................... ..................................... 59

T1可编程带内环路代码检测.......................................... ...................................... 60

成帧器有效载荷环回................................................................................................................. 61

8.10

8.10.1

8.10.2

HDLC

ONTROLLERS

................................................................................................................62

接收HDLC Controller..................................................................................................................... 62

发送HDLC Controller.................................................................................................................... 65

8.11

8.11.1

8.11.2

8.11.3

8.11.4

8.11.5

L

INE

I

覆盖整个院落

U

尼特

（刘

S

)....................................................................................................67

刘Operation....................................................................................................................................... 69

发射机........................................................................................................................................... 70

接收器............................................................................................................................................... 73

抖动Attenuator.................................................................................................................................... 76

刘环回..................................................................................................................................... 77

8.12

8.12.1

8.12.2

B

IT

-E

RROR

-R

吃

T

美东时间

（ BERT ）F

油膏

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

BERT重复模式设置............................................................................................................... 80

BERT错误Counter............................................................................................................................. 80

9.

9.1

设备寄存器.....................................................................................................81

R

EGISTER

L

ISTINGS

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

全球注册List.............................................................................................................................. 82

成帧器注册List............................................................................................................................. 83

刘和BERT注册List................................................................................................................. 90

全球寄存器位地图....................................................................................................................... 91

成帧器寄存器位地图...................................................................................................................... 92

刘寄存器位地图.......................................................................................................................... 100

BERT寄存器位地图...................................................................................................................... 100

9.1.1

9.1.2

9.1.3

9.2

R

EGISTER

B

IT

M

APS

......................................................................................................................91

9.2.1

9.2.2

9.2.3

9.2.4

9.3

9.4

9.5

9.6

G

叶形

R

EGISTER

D

EFINITIONS

..................................................................................................101

F

RAMER

R

EGISTER

D

EFINITIONS

.................................................................................................109

收到注册Definitions.............................................................................................................. 109

发送寄存器Definitions............................................................................................................. 168

9.4.1

9.4.2

刘

EGISTER

D

EFINITIONS

.........................................................................................................203

BERT

EGISTER

D

EFINITIONS

.....................................................................................................212

10.

10.1

10.2

10.3

10.4

功能时序................................................ ................................................. 220

T1

ECEIVER

F

UNCTIONAL

T

即时通信

D

IAGRAMS

..........................................................................220

T1 T

变送器

F

UNCTIONAL

T

即时通信

D

IAGRAMS

....................................................................225

E1

ECEIVER

F

UNCTIONAL

T

即时通信

D

IAGRAMS

..........................................................................230

E1牛逼

变送器

F

UNCTIONAL

T

即时通信

D

IAGRAMS

....................................................................232

11.

11.1

11.2

操作参数................................................ ....................................... 235

T

有源冰箱

C

极特

....................................................................................................236

L

INE

I

覆盖整个院落

C

极特

..........................................................................................236

12.

12.1

AC时序特性............................................... ................................. 237

M

ICROPROCESSOR

B

US

AC - C

极特

........................................................................237

并口Mode.............................................................................................................................. 237

SPI总线模式.................................................................................................................................... 240

12.1.1

12.1.2

12.2

12.3

我JTAG

覆盖整个院落

T

即时通信

.........................................................................................................248

S

变体系

C

LOCK

AC - C

极特

....................................................................................249

3的258

DS26521单T1 / E1 / J1收发器

13.

13.1

JTAG边界扫描和测试访问端口........................................... ... 250

TAP

ONTROLLER

S

TATE

M

ACHINE

.........................................................................................251

Test-Logic-Reset................................................................................................................................ 251

运行测试空闲..................................................................................................................................... 251

选择DR扫描................................................................................................................................. 251

捕捉-DR ........................................................................................................................................ 251

Shift-DR.............................................................................................................................................. 251

Exit1-DR............................................................................................................................................. 251

Pause-DR........................................................................................................................................... 251

Exit2-DR............................................................................................................................................. 251

更新DR ......................................................................................................................................... 251

选择红外扫描............................................................................................................................... 251

捕获红外...................................................................................................................................... 252

Shift-IR............................................................................................................................................ 252

Exit1-IR........................................................................................................................................... 252

Pause-IR......................................................................................................................................... 252

Exit2-IR........................................................................................................................................... 252

更新IR ....................................................................................................................................... 252

示例： PRELOAD .......................................................................................................................... 254

BYPASS ............................................................................................................................................. 254

EXTEST ............................................................................................................................................. 254

CLAMP............................................................................................................................................... 254

HIGHZ ................................................................................................................................................ 254

IDCODE ............................................................................................................................................. 254

13.1.1

13.1.2

13.1.3

13.1.4

13.1.5

13.1.6

13.1.7

13.1.8

13.1.9

13.1.10

13.1.11

13.1.12

13.1.13

13.1.14

13.1.15

13.1.16

13.2

13.2.1

13.2.2

13.2.3

13.2.4

13.2.5

13.2.6

I

NSTRUCTION

R

EGISTER

...........................................................................................................254

13.3

13.4

13.4.1

13.4.2

13.4.3

JTAG编号C

副执行秘书办公室

......................................................................................................................255

T

美东时间

R

EGISTERS

.....................................................................................................................255

边界扫描寄存器.................................................................................................................... 255

旁路寄存器................................................................................................................................. 255

鉴定Register......................................................................................................................... 255

14.

15.

15.1

引脚配置................................................ ................................................. 256

封装信息................................................ .......................................... 257

64-P

IN

LQFP （ 56 G4019-001 ） .......................................... .................................................. 257 ....

16.

文档版本历史............................................... ................................ 258

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DS26521单T1 / E1 / J1收发器

图列表

图6-1 。框图......................................................................................................................................... 17

图6-2 。详细座Diagram........................................................................................................................... 18

图8-1 。为读模式的SPI串行端口访问（ SPI_CPOL = 0 ， SPI_CPHA = 0 ） ................................. ............ 26

图8-2 。为读模式的SPI串行端口访问（ SPI_CPOL = 1 ， SPI_CPHA = 0 ） ................................. ............ 26

图8-3 。为读模式的SPI串行端口访问（ SPI_CPOL = 0 ， SPI_CPHA = 1 ） ................................. ............ 26

图8-4 。为读模式的SPI串行端口访问（ SPI_CPOL = 1 ， SPI_CPHA = 1 ） ................................. ............ 26

图8-5 。为写模式的SPI串行端口访问（ SPI_CPOL = 0 ， SPI_CPHA = 0 ） ................................. ............ 27

图8-6 。为写模式的SPI串行端口访问（ SPI_CPOL = 1 ， SPI_CPHA = 0 ） ................................. ............ 27

图8-7 。为写模式的SPI串行端口访问（ SPI_CPOL = 0 ， SPI_CPHA = 1 ） ................................. ............ 27

图8-8 。为写模式的SPI串行端口访问（ SPI_CPOL = 1 ， SPI_CPHA = 1 ） ................................. ............ 27

图8-9 。背板时钟Generation................................................................................................................... 28

图8-10 。设备的中断信息流程图............................................. .............................................. 31

图8-11 。 IBO范例电路.............................................................................................................................. 35

图8-12 。 RSYNC输入的H.100 （ CT总线） Mode................................................................................................. 36

图8-13 。 TSSYNCIO （输入模式）输入的H.100 （ CT总线）模式................................... .................................. 37

图8-14 。 CRC- 4重新计算的方法.................................................................................................................. 58

图8-15 。接收HDLC Example........................................................................................................................ 64

图8-16 。 HDLC发送留言Example....................................................................................................... 66

图8-17 。基本平衡网络连接.............................................. .................................................. .. 68

图8-18 。 T1 / J1发射脉冲模板.......................................................................................................... 71

图8-19 。 E1发送脉冲模板............................................................................................................... 72

图8-20 。典型监测中的应用................................................................................................................... 74

图8-21 。抖动衰减................................................................................................................................... 76

图8-22 。类似物Loopback................................................................................................................................... 77

图8-23 。本地回环..................................................................................................................................... 77

图8-24 。远程回环................................................................................................................................. 78

图8-25 。双返回...................................................................................................................................... 78

图10-1 。 T1接收端定时D4 ................................................................................................................ 220

图10-2 。 T1接收端ESF Timing.............................................................................................................. 220

图10-3 。 T1接收端边界定时（弹性商店禁用） ....................................... ........................ 221

图10-4 。 T1接收端1.544MHz边界定时（弹性商店启用） ..................................... ......... 221

图10-5 。 T1接收端2.048MHz的边界定时（弹性商店启用） ..................................... ......... 222

图10-6 。 T1接收方交织总线操作字节模式........................................ .......................... 223

图10-7 。 T1接收方交织总线操作帧模式........................................ ...................... 224

图10-8 。 T1发射端D4时序............................................................................................................... 225

图10-9 。 T1发送方的ESF Timing............................................................................................................. 225

图10-10 。 T1发送方的边界定时（弹性商店禁用） ....................................... ..................... 226

图10-11 。 T1发射端1.544MHz边界定时（弹性商店启用） ..................................... ...... 226

图10-12 。 T1发射端2.048MHz的边界定时（弹性商店启用） ..................................... ...... 227

图10-13 。 T1发送方的交织总线操作字节模式........................................ ....................... 228

图10-14 。 T1发射交错总线操作帧模式.......................................... .......................... 229

图10-15 。 E1接收端Timing.................................................................................................................... 230

图10-16 。 E1接收端边界定时（弹性商店禁用） ....................................... ..................... 230

图10-17 。 E1接收端1.544MHz边界定时（弹性商店启用） ..................................... ....... 231

图10-18 。 E1接收端2.048MHz的边界定时（弹性商店启用） ..................................... ....... 231

图10-19 。 E1发送端Timing................................................................................................................... 232

图10-20 。 E1发送端边界定时（弹性商店禁用） ....................................... .................... 232

图10-21 。 E1发送端1.544MHz边界定时（弹性商店启用） ..................................... ...... 233

图10-22 。 E1发送端2.048MHz的边界定时（弹性商店启用） ..................................... ...... 233

图10-23 。 E1 G.802计时............................................................................................................................... 234

图12-1 。英特尔总线读时序（ BTS = 0 ） ........................................................................................................ 238

图12-2 。英特尔总线写时序（ BTS = 0)......................................................................................................... 238

图12-3 。摩托罗拉总线读时序（ BTS = 1 ） ......................................... .................................................. ...... 239

图12-4 。摩托罗拉总线写时序（ BTS = 1 ） ......................................... .................................................. ...... 239

图12-5 。 SPI接口时序图............................................................................................................. 241

图12-6 。接收成帧器时序背板（T模式） ......................................... ........................................ 243

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