DS21455/DS21458

四路T1 / E1 / J1收发器

www.maxim-ic.com

概述

在DS21455和DS21458是单片四路

设备配有独立的收发器

可以被配置为T1， E1或J1软件

操作。各组成的线路接口的

单元（LIU ） ，成帧器， HDLC控制器，和一

TDM背板接口，并且经由控制

配置为Intel或8位并行口

摩托罗拉总线操作。该DS21455 *是

直接替换旧的DS21Q55四

MCM设备。该DS21458 ，在一个较小的

包（ 17毫米CSBGA ），并设有一个

改进的控制器接口，是软件

与旧DS21Q55兼容。

*本

在DS21455 / DS21458的JTAG功能是一个单

控制器对所有四个收发器，不像DS21Q55 ，其具有

一个JTAG控制器每收发器架构。

特点

四个独立的收发器，每一个

以下功能：

§

完整的T1 （ DS1 ） / ISDN - PRI / J1

收发器功能

§

完整的E1 （CEPT ）的PCM -30 / ISDN-

PRI收发器功能

§

短期和长途线路接口

时钟/数据恢复和波形整形

§

CMI编码器/解码器

§

晶振的抖动衰减器

§

完全独立的发送和接收

的功能

§

双HDLC控制器

§

片上可编程BERT发生器

和检测器

§

内部软件可选接收 -

与发送方终端电阻

为75Ω / 100Ω / 120Ω T1和E1

接口

§

两个双帧弹性缓存滑动

缓冲区可以连接到

异步背板最多

16.384MHz

§

16.384MHz的， 8.192MHz的， 4.096MHz或

2.048MHz的时钟输出到合成

恢复网络时钟

§

可编程输出时钟的

分数T1 ， E1 ， H0和H12

应用

§

交错式PCM总线操作

§

8位并行控制端口，复用

用或非复用， Intel或Motorola

§

IEEE 1149.1 JTAG边界扫描

§

3.3V供电，容许5V输入和

输出

§

DS21455直接替换DS21Q55

§

7号信令系统（ SS7 ）支持

§

RAI - CI ， AIS- CI支持

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

订购信息

部分

DS21455

DS21455N

DS21458

DS21458N

温度范围

0 ° C至+ 70°C

-40 ° C至+ 85°C

0 ° C至+ 70°C

-40 ° C至+ 85°C

PIN- PACKAGE

256 BGA

（ 27毫米X 27毫米）

256 BGA

（ 27毫米X 27毫米）

256 CSBGA

（ 17毫米x17毫米）

256 CSBGA

（ 17毫米x17毫米）

达拉斯是达拉斯半导体公司的注册商标。

马克西姆是Maxim Integrated Products ，Inc.的注册商标。

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 。

1 270

REV ： 040804

DS21455 / DS21458四路T1 / E1 / J1收发器

文档修订历史记录

调整

040804

变化

新产品发布。

2 270

DS21455 / DS21458四路T1 / E1 / J1收发器

目录

描述................................................................................................................................................9

1.1

S

标准协商

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

2.

特写HIGHLIGHTS...............................................................................................................................11

2.1

G

ENERAL

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

2.2

L

INE

I

覆盖整个院落

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

2.3

C

LOCK

S

YNTHESIZER

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

2.4

J

伊特尔

A

TTENUATOR

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

2.5

F

RAMER

/F

ORMATTER

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

2.6

S

变体系

I

覆盖整个院落

........................................................................................................... 13

2.7

HDLC

ONTROLLERS

....................................................................................................... 13

2.8

T

EST和

D

IAGNOSTICS

.................................................................................................... 13

2.9

E

XTENDED

S

变体系

I

载文信息

B

US

.............................................................................. 14

2.10 C

ONTROL

P

ORT

................................................................................................................ 14

3.

框图........................................................................................................................................15

4.

DS21455 / DS21458 DELTA ...........................................................................................................................17

4.1

P

ACKAGE

.......................................................................................................................... 17

4.2

C

ONTROLLER

I

覆盖整个院落

................................................................................................... 17

4.3

ESIB F

油膏

................................................................................................................ 17

4.4

F

RAMER

/刘我

NTERIM

S

IGNALS

.......................................................................................... 17

5.

引脚功能DESCRIPTION....................................................................................................................20

5.1

T

RANSMIT

S

IDE

P

插件

......................................................................................................... 20

5.2

R

ECEIVE

S

IDE

P

插件

........................................................................................................... 22

5.3

P

ARALLEL

C

ONTROL

P

ORT

P

插件

........................................................................................ 24

5.4

E

XTENDED

S

变体系

I

载文信息

B

US

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

5.5

JTAG牛逼

美东时间

A

CCESS

P

ORT

P

插件

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

5.6

L

INE

I

覆盖整个院落

P

插件

........................................................................................................ 27

5.7

S

UPPLY

P

插件

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

5.8

P

IN

D

ESCRIPTIONS

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

5.9

P

ACKAGES

........................................................................................................................ 39

6.

并行端口.........................................................................................................................................41

6.1

R

EGISTER

M

AP

................................................................................................................. 41

7.

特殊每通道寄存器操作............................................ ...................................... 46

8.

编程MODEL.............................................................................................................................48

8.1

P

OWER

-U

P

S

EQUENCE

...................................................................................................... 49

8.1.1

主模式Register........................................................................................................49

8.2

I

NTERRUPT

H

ANDLING

....................................................................................................... 50

8.3

S

TATUS

R

EGISTERS

.......................................................................................................... 50

8.4

I

载文信息

R

EGISTERS

.................................................................................................. 51

8.5

I

NTERRUPT

I

载文信息

R

EGISTERS

................................................................................ 51

9.

CLOCK地图.................................................................................................................................................52

10.

T1成帧器/ FORMATTER控制寄存器............................................ ..................................... 53

10.1 T1

ONTROL

R

EGISTERS

.................................................................................................. 53

10.2 T1 T

RANSMIT

T

RANSPARENCY

........................................................................................... 58

10.3 AIS- CI

和

RAI -CI摹

生成及

D

ETECTION

............................................................. 59

10.4 T1

ECEIVE

-S

IDE

D

IGITAL

-M

ILLIWATT

C

ODE

G

eneration

................................................. 60

10.5 T1我

载文信息

R

EGISTER

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

11.

E1成帧器/ FORMATTER控制寄存器............................................ ..................................... 64

11.1 E1

ONTROL

R

EGISTERS

.................................................................................................. 64

11.2 A

UTOMATIC

A

LARM

G

eneration

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

11.2.1

AUTO AIS

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

11.2.2

自动RAI

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

11.2.3

自动E-位

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

11.2.4

G.706 CRC- 4互通

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

11.3 E1我

载文信息

R

EGISTERS

............................................................................................ 69

12.

通用控制和状态寄存器............................................. ........................................ 71

3的270

1.

DS21455 / DS21458四路T1 / E1 / J1收发器

13.

I / O引脚配置选项..........................................................................................................78

14.

环回配置................................................................................................................80

14.1 P

ER

-C

HANNEL

P

AYLOAD

L

OOPBACK

.................................................................................. 83

15.

错误计数REGISTERS......................................................................................................................85

15.1 L

INE

C

ODE

V

IOLATION

C

'mount

R

EGISTER

（ LCVCR ） .............................. ............. 86

15.1.1

T1 Operation....................................................................................................................86

15.1.2

E1 Operation....................................................................................................................86

15.2 P

ATH

C

ODE

V

IOLATION

C

'mount

R

EGISTER

（ PCVCR ） .............................. ........... 88

15.2.1

T1 Operation....................................................................................................................88

15.2.2

E1 Operation....................................................................................................................88

15.3 F

RAMES

O

UT

O

F

S

YNC

C

'mount

R

EGISTER

（ FOSCR ） .............................. ........... 89

15.3.1

T1 Operation....................................................................................................................89

15.3.2

E1 Operation....................................................................................................................89

15.4 E- B

IT

C

OUNTER

R

EGISTER

（ EBCR ） .............................. .................................... 90

16.

DS0监控功能...................................................................................................................91

16.1 T

RANSMIT

DS0 M

onitor

R

EGISTERS

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

16.2 R

ECEIVE

DS0 M

onitor

R

EGISTERS

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

17.

信令操作............................................................................................................................93

17.1 R

ECEIVE

S

ignaling

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

17.1.1

基于处理器的接收信号............................................. ............................... 94

17.1.2

基于硬件的接收信号

............................................................................94

17.2 T

RANSMIT

S

ignaling

...................................................................................................... 100

17.2.1

处理器为基础的发送信号

........................................................................100

17.2.2

软件信令插入使能寄存器， E1 CAS模式............................. 104

17.2.3

软件信令插入使能寄存器， T1模式

......................................106

18.

每信道空闲码生成............................................ ................................................ 108

18.1 I

DLE

C

ODE

P

AGC软件

E

XAMPLES

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

19.

通道阻滞REGISTERS.........................................................................................................113

20.

弹性存储器OPERATION...............................................................................................................116

20.1 R

ECEIVE

S

IDE

................................................................................................................. 119

20.1.1

T1模式

.........................................................................................................................119

20.1.2

E1模式

.........................................................................................................................119

20.2 T

RANSMIT

S

IDE

............................................................................................................... 120

20.2.1

T1模式

.........................................................................................................................120

20.2.2

E1模式

.........................................................................................................................120

20.3 E

LASTIC

S

TORES

I

NITIALIZATION

...................................................................................... 120

20.4 M

最小值：

-D

ELAY

M

ODE

................................................................................................... 121

21.

G.706中级CRC- 4更新（ E1模式） ..................................... ........................... 122

22.

T1面向比特的代码（ BOC ）控制器.......................................... ........................................... 123

22.1 T

RANSMIT

BOC............................................................................................................... 123

22.2 R

ECEIVE

BOC................................................................................................................. 123

23.

附加（SA ）和国际（SI ）位操作（仅限于E1 ） ................................... ..... 127

23.1 H

ARDWARE

S

CHEME

(M

ETHOD

1) .................................................................................... 127

23.2 I

NTERNAL

R

EGISTER

S

CHEME

B

ASED

O

N

D

OUBLE

-F

RAME

(M

ETHOD

2) ............................. 127

23.3 I

NTERNAL

R

EGISTER

S

CHEME

B

ASED

O

N

CRC- 4米

ULTIFRAME

(M

ETHOD

3)...................... 130

24.

HDLC控制器..............................................................................................................................141

24.1 B

ASIC

O

PERATION

D

ETAILS

............................................................................................. 141

24.2 HDLC

ONFIGURATION

................................................................................................... 143

24.2.1

FIFO控制

..................................................................................................................145

24.3 HDLC M

APPING

.............................................................................................................. 146

24.3.1

Receive...........................................................................................................................146

24.3.2

发送

.........................................................................................................................148

24.3.3

FIFO信息

...........................................................................................................153

24.3.4

接收数据包的字节可用

.................................................................................153

24.3.5

HDLC的FIFO

.................................................................................................................154

24.4 R

ECEIVE

HDLC

ODE

E

XAMPLE

...................................................................................... 155

24.5 L

EGACY

FDL S

UPPORT

（ T1 M

ODE

) ................................................................................. 155

4 270

DS21455 / DS21458四路T1 / E1 / J1收发器

24.5.1

接收部分

............................................................................................................155

24.5.2

发射部分

...........................................................................................................157

24.6 D4 / SLC -96

PERATION

................................................................................................. 157

25.

线路接口单元（ LIU） ....................................................................................................................158

25.1刘

PERATION

.............................................................................................................. 159

25.2刘

ECEIVER

................................................................................................................ 159

25.2.1

接收电平Indicator................................................................................................160

25.2.2

G.703接收10条同步信号

.................................................160

25.2.3

显示器Mode.................................................................................................................160

25.3刘牛逼

变送器

........................................................................................................... 161

25.3.1

发送短路检测器/限制器

.....................................................................161

25.3.2

发送开路检测

..................................................................................161

25.3.3

发送BPV错误插入

......................................................................................162

25.3.4

发送G.703第10同步信号（ E1模式） ........................ 162

25.4 MCLK P

重新依比例调整

......................................................................................................... 162

25.5 J

伊特尔

A

TTENUATOR

....................................................................................................... 162

25.6 CMI （C

ODE

M

ARK

I

n版本

) O

PTION

............................................................................ 163

25.7刘超

ONTROL

R

EGISTERS

............................................................................................... 164

25.8 R

ECOMMENDED

C

IRCUITS

................................................................................................ 173

25.9 C

OMPONENT

S

PECIFICATIONS

.......................................................................................... 175

26.

可编程带内循环代码生成和检测...................................... 179

27.

BERT功能.......................................................................................................................................186

27.1 BERT

EGISTER

D

ESCRIPTION

....................................................................................... 187

27.2 BERT

EPETITIVE

P

ATTERN

S

ET

..................................................................................... 192

27.3 BERT B

IT

C

OUNTER

....................................................................................................... 193

27.4 BERT ê

RROR

C

OUNTER

................................................................................................. 194

28.

有效载荷错误插入功能.............................................. .............................................. 195

28.1 N

棕土

O

F

E

RROR

R

EGISTERS

...................................................................................... 197

28.1.1

错误号码留给注册

..................................................................................198

29.

交错PCM总线操作...................................................................................................199

29.1 C

HANNEL

I

NTERLEAVE

M

ODE

........................................................................................... 199

29.2 F

RAME

I

NTERLEAVE

M

ODE

............................................................................................... 199

30.

扩展系统信息总线（ ESIB ） ........................................... ....................................... 202

31.

可编程背板时钟合成器.............................................. ....................... 208

32.

部分T1 / E1支持................................................................................................................209

33.

用户可编程输出引脚上............................................. .................................................. 0.210

34.

发送流DIAGRAMS..................................................................................................................211

35.

JTAG边界扫描结构和测试访问端口....................................... ...... 216

35.1 I

NSTRUCTION

R

EGISTER

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

35.2 T

美东时间

R

EGISTERS

............................................................................................................. 222

35.3 B

OUNDARY

S

可以

R

EGISTER

............................................................................................ 222

35.4 B

YPASS

R

EGISTER

.......................................................................................................... 222

35.5 I

DENTIFICATION

R

EGISTER

............................................................................................... 222

36.

功能时序DIAGRAMS...........................................................................................................228

36.1 T1 M

ODE

........................................................................................................................ 228

36.2 E1 M

ODE

........................................................................................................................ 238

37.

操作PARAMETERS.....................................................................................................................251

38.

AC时序参数和DIAGRAMS..........................................................................................253

38.1 M

ULTIPLEXED

B

US

AC - C

极特

........................................................................ 253

38.2 N

ONMULTIPLEXED

B

US

AC - C

极特

................................................................. 256

38.3 R

ECEIVE

S

IDE

AC - C

极特

.............................................................................. 259

38.4 T

RANSMIT

AC - C

极特

.................................................................................... 265

39.

封装信息........................................................................................................................269

5 270