DS2155

T1 / E1 / J1单芯片收发器

www.maxim-ic.com

概述

该DS2155是一个软件可选的T1 ，E1或J1

单芯片收发器（ SCT ）短途和

长途应用。在DS2155组成的

线路接口单元（LIU ） ，成帧器， HDLC控制器

和一个TDM背板接口，并且通过控制

配置为Intel或Motorola的8位并行口

公交车运营。该DS2155是引脚和软件

与DS2156兼容。

刘是由发射和接收

接口和抖动衰减器。发送

接口负责生成必要

波形，用于驱动该网络，并提供

根据不同的类型选择正确的源阻抗

媒体使用。 T1波形生成包括

DSX -1线路附加件和CSU线路外附

的-7.5dB ， -15dB和-22.5db，可E1波形

代包括G.703波形为75Ω

同轴线或120Ω双绞线电缆。该接收接口

提供网络终端和恢复时钟和

来自网络的数据。

特点

完整的T1 / DS1 / ISDN - PRI / J1收发器

的功能

完整的E1 （CEPT ）的PCM -30 / ISDN-PRI

收发器功能

长途和短途线路接口

时钟/数据恢复和波形整形

CMI编码器/解码器，光学I / F

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

可编程BERT发生器与检测器

内部软件可选接收和

发送方的终端电阻

75Ω / 100Ω / 120Ω T1和E1接口

双帧弹性缓存滑动缓冲器，

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

产品特点继续第

3.

应用

T1 / E1 / J1线卡

交换机和路由器

分插复用器

订购信息

部分

DS2155L

DS2155L+

DS2155LN

DS2155LN+

DS2155G

DS2155G+

DS2155GN

DS2155GN

温度范围

0 ° C至+ 70°C

0 ° C至+ 70°C

-40 ° C至+ 85°C

-40 ° C至+ 85°C

0 ° C至+ 70°C

0 ° C至+ 70°C

-40 ° C至+ 85°C

-40 ° C至+ 85°C

PIN- PACKAGE

100 LQFP

100 LQFP

100 LQFP

100 LQFP

100 CSBGA

100 CSBGA

100 CSBGA

100 CSBGA

T1/E1/J1

网

DS2155

T1/E1/J1

SCT

背板

TDM

+

表示无铅/符合RoHS标准的封装。

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 。

1 238

REV ： 080607

DS2155

1.目录

1.

1.1

1.2

2.

3.

3.1

3.2

4.

4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8

4.9

4.10

5.

5.1

6.

目录............................................................................................................................2

T

干练

F

IGURES

........................................................................................................................................6

T

干练

T

ABLES

..........................................................................................................................................7

数据手册版本历史.....................................................................................................8

主FEATURES....................................................................................................................................10

F

UNCTIONAL

D

ESCRIPTION

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

B

LOCK

D

IAGRAM

.........................................................................................................................................15

引脚功能说明...........................................................................................................19

T

RANSMIT

S

IDE

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

R

ECEIVE

S

IDE

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

P

ARALLEL

C

ONTROL

P

ORT

P

插件

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

E

XTENDED

S

变体系

I

载文信息

B

US

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

U

SER

O

安输出

P

ORT

P

插件

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

JTAG牛逼

美东时间

A

CCESS

P

ORT

P

插件

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

L

INE

I

覆盖整个院落

P

插件

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

S

UPPLY

P

插件

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

L

和

克对

ACKAGE

P

INOUT

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

10

MM

CSBGA P

IN

C

ONFIGURATION

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

并行端口...................................................................................................................................33

R

EGISTER

M

AP

............................................................................................................................................33

编程MODEL.....................................................................................................................39

6.1 P

OWER

-U

P

S

EQUENCE

.................................................................................................................................40

6.1.1

主模式Register.........................................................................................................................40

6.2 I

NTERRUPT

H

ANDLING

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

6.3 S

TATUS

R

EGISTERS

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

6.4 I

载文信息

R

EGISTERS

...........................................................................................................................42

6.5 I

NTERRUPT

I

载文信息

R

EGISTERS

........................................................................................................42

7.

8.

9.

9.1

9.2

9.3

9.4

10.

10.1

10.2

10.3

11.

11.1

特殊每通道寄存器操作............................................ ........................... 43

CLOCK地图............................................................................................................................................45

T1成帧器/ FORMATTER控制和状态寄存器.......................................... ..46

T1

ONTROL

R

EGISTERS

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

T1 T

RANSMIT

T

RANSPARENCY

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

AIS- CI

和

RAI -CI摹

生成及

D

ETECTION

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

T1

ECEIVE

-S

IDE

D

IGITAL

-M

ILLIWATT

C

ODE

G

eneration

.....................................................................52

E1成帧器/ FORMATTER控制和状态寄存器.......................................... ..55

E1

ONTROL

R

EGISTERS

.........................................................................................................................55

A

UTOMATIC

A

LARM

G

eneration

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

我E1

载文信息

R

EGISTERS

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

通用控制和状态寄存器............................................. ............................. 62

T1 / E1 S

TATUS

R

EGISTERS

......................................................................................................................63

2 238

DS2155

12.

13.

13.1

14.

I / O引脚配置OPTIONS.................................................................................................69

环回配置..........................................................................................................71

P

ER

-C

HANNEL

L

OOPBACK

......................................................................................................................73

错误计数寄存器...............................................................................................................75

14.1

L

INE

-C

ODE

V

IOLATION

C

'mount

R

EGISTER

(LCVCR).............................................................................76

14.1.1 T1 Operation.......................................................................................................................................76

14.1.2 E1 Operation.......................................................................................................................................76

14.2

P

ATH

C

ODE

V

IOLATION

C

'mount

R

EGISTER

（ PCVCR ） .............................. ............................. 78

14.2.1 T1 Operation.......................................................................................................................................78

14.2.2 E1 Operation.......................................................................................................................................78

14.3

F

RAMES

O

UT

-

OF

-S

YNC

C

'mount

R

EGISTER

(FOSCR)..............................................................................79

14.3.1 T1 Operation.......................................................................................................................................79

14.3.2 E1 Operation.......................................................................................................................................79

14.4

E- B

IT

C

OUNTER

(EBCR).........................................................................................................................80

15.

16.

DS0监控功能...........................................................................................................81

信令操作.....................................................................................................................83

16.1

R

ECEIVE

S

ignaling

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

基于处理器16.1.1 Signaling.................................................................................................................83

16.1.2基于硬件的接收信号...................................................................................................84

16.2

T

RANSMIT

S

ignaling

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

16.2.1处理器的模式.......................................................................................................................89

16.2.2软件信号插入使能寄存器， E1 CAS模式..................................... ..................... 93

16.2.3软件信号插入使能寄存器， T1模式...................................... ............................ 95

基于硬件16.2.4 Mode.......................................................................................................................95

17.

17.1

18.

19.

每信道空闲码生成............................................ ........................................ 96

I

DLE

-C

ODE

P

AGC软件

E

XAMPLES

..................................................................................................97

通道阻滞寄存器............................................... ................................................. 101

弹性存储器OPERATION........................................................................................................104

19.1

R

ECEIVE

S

IDE

........................................................................................................................................107

19.1.1 T1模式............................................................................................................................................107

19.1.2 E1 Mode............................................................................................................................................107

19.2

T

RANSMIT

S

IDE

.....................................................................................................................................107

19.2.1 T1模式............................................................................................................................................108

19.2.2 E1 Mode............................................................................................................................................108

19.3

E

LASTIC

S

TORES

I

NITIALIZATION

.........................................................................................................108

19.4

M

最小值：

D

ELAY

M

ODE

.......................................................................................................................108

20.

21.

G.706中级CRC- 4更新（ E1模式） ..................................... .............. 109

T1面向位的代码（ BOC ）控制器......................................... ................................. 110

21.1

T

RANSMIT

BOC.....................................................................................................................................110

发送BOC ..............................................................................................................................................110

21.2

R

ECEIVE

中国银行.......................................................................................................................................110

收到BOC.................................................................................................................................................110

22.

附加（ SA ）和国际（ SI ）位操作（仅限于E1 ） ...................... 113

3的238

DS2155

22.1

22.2

22.3

23.

M

ETHOD

1: H

ARDWARE

S

CHEME

.........................................................................................................113

M

ETHOD

2: I

NTERNAL

R

EGISTER

S

CHEME

B

ASED ON

D

OUBLE

-F

RAME

..............................................113

M

ETHOD

3: I

NTERNAL

R

EGISTER

S

CHEME

B

ASED ON

CRC4 M

ULTIFRAME

........................................116

HDLC控制器........................................................................................................................126

23.1

B

ASIC

O

PERATION

D

ETAILS

..................................................................................................................126

23.2

HDLC

ONFIGURATION

........................................................................................................................126

23.2.1 FIFO Control....................................................................................................................................130

23.3

HDLC M

APPING

....................................................................................................................................131

23.3.1接收..............................................................................................................................................131

23.3.2发送............................................................................................................................................133

23.3.3 FIFO信息.............................................................................................................................138

23.3.4接收数据包字节Available........................................................................................................138

23.3.5 HDLC的FIFO ....................................................................................................................................139

23.4

R

ECEIVE

HDLC

ODE

E

XAMPLE

..........................................................................................................140

23.5

L

EGACY

FDL S

UPPORT

（ T1 M

ODE

)......................................................................................................140

23.5.1概述...........................................................................................................................................140

23.5.2接收部分.................................................................................................................................140

23.5.3发送部分...............................................................................................................................142

23.6

D4 / SLC -96

PERATION

........................................................................................................................142

24.

线路接口单元（ LIU） ...........................................................................................................143

24.1

刘

PERATION

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

24.2

R

ECEIVER

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

24.2.1接收电平指示器和阈值中断......................................... .................................... 144

24.2.2接收G.703同步信号（ E1模式） ..................................... ...................................... 144

24.2.3监控模式...................................................................................................................................144

24.3

T

变送器

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

24.3.1发送短路检测器/限幅器........................................ .................................................. 145

24.3.2发送开路Detector.......................................................................................................145

24.3.3发送BPV错误插入..........................................................................................................145

24.3.4发送G.703同步信号（ E1模式） ..................................... .................................... 145

24.4

MCLK P

重新依比例调整

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

24.5

J

伊特尔

A

TTENUATOR

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

24.6

CMI （C

ODE

M

ARK

I

n版本

) O

PTION

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

24.7

刘成

ONTROL

R

EGISTERS

.....................................................................................................................147

24.8

R

ECOMMENDED

C

IRCUITS

.....................................................................................................................156

24.9

C

OMPONENT

S

PECIFICATIONS

...............................................................................................................158

25.

26.

26.1

26.2

26.3

26.4

26.5

26.6

27.

可编程带内循环代码生成和检测...................... 163

BERT功能..................................................................................................................................170

S

TATUS

..................................................................................................................................................170

M

APPING

...............................................................................................................................................170

BERT

EGISTER

D

ESCRIPTIONS

...........................................................................................................172

BERT

EPETITIVE

P

ATTERN

S

ET

..........................................................................................................176

BERT B

IT

C

OUNTER

.............................................................................................................................177

BERT ê

RROR

C

OUNTER

........................................................................................................................178

有效载荷ERROR -插入函数（ T1模式） ........................................ ........ 180

27.1

N

棕土

-

OF

-E

RRORS

R

EGISTERS

..........................................................................................................182

27.1.1数-的，左的错误Register........................................................................................................183

28.

交错PCM总线操作（ IBO ） ........................................... .................................... 184

4 238

DS2155

28.1

28.2

29.

30.

31.

32.

33.

34.

34.1

34.2

34.3

34.4

34.5

34.6

35.

35.1

35.2

36.

37.

37.1

37.2

37.3

37.4

37.5

38.

38.1

38.2

C

HANNEL

I

NTERLEAVE

.........................................................................................................................184

F

RAME

I

NTERLEAVE

..............................................................................................................................184

扩展系统信息总线（ ESIB ） ........................................... ............................ 187

可编程背板时钟合成器.............................................. .......... 191

部分T1 / E1支持.........................................................................................................191

用户可编程输出引脚上............................................. ........................................... 193

TRANSMIT流程图.........................................................................................................194

JTAG边界扫描结构和测试访问端口................................. 199

D

ESCRIPTION

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

I

NSTRUCTION

R

EGISTER

........................................................................................................................202

T

美东时间

R

EGISTERS

....................................................................................................................................204

B

OUNDARY

S

可以

R

EGISTER

.................................................................................................................204

B

YPASS

R

EGISTER

.................................................................................................................................204

I

DENTIFICATION

R

EGISTER

....................................................................................................................204

功能时序DIAGRAMS.................................................................................................208

T1 M

ODE

...............................................................................................................................................208

E1 M

ODE

...............................................................................................................................................213

操作参数..............................................................................................................222

AC时序参数和图表............................................. .................................. 224

M

ULTIPLEXED

B

US

AC - C

极特

..........................................................................................224

N

ONMULTIPLEXED

B

US

AC - C

极特

...................................................................................227

R

ECEIVE

-S

IDE

AC - C

极特

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

B

无源底板

C

LOCK

T

即时通信

： AC - C

极特

.........................................................................233

T

RANSMIT

AC - C

极特

........................................................................................................234

封装信息................................................................................................................237

100-P

IN

LQFP （ 56 G5002-000 ） ............................................................................................................237

100-B

所有

CSBGA （ 56 G6008-001 ） .....................................................................................................238

5 238

DS2155

T1 / E1 / J1单芯片收发器

www.maxim-ic.com

概述

该DS2155是一个软件可选的T1 ，E1或J1

单芯片收发器（ SCT ）短途和

长途应用。在DS2155组成的

线路接口单元（LIU ） ，成帧器， HDLC控制器

和一个TDM背板接口，并且通过控制

配置为Intel或Motorola的8位并行口

公交车运营。该DS2155是引脚和软件

与DS2156兼容。

刘是由发射和接收

接口和抖动衰减器。发送

接口负责生成必要

波形，用于驱动该网络，并提供

根据不同的类型选择正确的源阻抗

媒体使用。 T1波形生成包括

DSX -1线路附加件和CSU线路外附

的-7.5dB ， -15dB和-22.5db，可E1波形

代包括G.703波形为75Ω

同轴线或120Ω双绞线电缆。该接收接口

提供网络终端和恢复时钟和

来自网络的数据。

特点

完整的T1 / DS1 / ISDN - PRI / J1收发器

的功能

完整的E1 （CEPT ）的PCM -30 / ISDN-PRI

收发器功能

长途和短途线路接口

时钟/数据恢复和波形整形

CMI编码器/解码器，光学I / F

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

可编程BERT发生器与检测器

内部软件可选接收和

发送方的终端电阻

75Ω / 100Ω / 120Ω T1和E1接口

双帧弹性缓存滑动缓冲器，

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

产品特点继续第

3.

应用

T1 / E1 / J1线卡

交换机和路由器

分插复用器

订购信息

部分

DS2155L

DS2155L+

DS2155LN

DS2155LN+

DS2155G

DS2155G+

DS2155GN

DS2155GN

温度范围

0 ° C至+ 70°C

0 ° C至+ 70°C

-40 ° C至+ 85°C

-40 ° C至+ 85°C

0 ° C至+ 70°C

0 ° C至+ 70°C

-40 ° C至+ 85°C

-40 ° C至+ 85°C

PIN- PACKAGE

100 LQFP

100 LQFP

100 LQFP

100 LQFP

100 CSBGA

100 CSBGA

100 CSBGA

100 CSBGA

T1/E1/J1

网

DS2155

T1/E1/J1

SCT

背板

TDM

+

表示无铅/符合RoHS标准的封装。

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 。

1 238

REV ： 080607

DS2155

1.目录

1.

1.1

1.2

2.

3.

3.1

3.2

4.

4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8

4.9

4.10

5.

5.1

6.

目录............................................................................................................................2

T

干练

F

IGURES

........................................................................................................................................6

T

干练

T

ABLES

..........................................................................................................................................7

数据手册版本历史.....................................................................................................8

主FEATURES....................................................................................................................................10

F

UNCTIONAL

D

ESCRIPTION

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

B

LOCK

D

IAGRAM

.........................................................................................................................................15

引脚功能说明...........................................................................................................19

T

RANSMIT

S

IDE

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

R

ECEIVE

S

IDE

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

P

ARALLEL

C

ONTROL

P

ORT

P

插件

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

E

XTENDED

S

变体系

I

载文信息

B

US

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

U

SER

O

安输出

P

ORT

P

插件

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

JTAG牛逼

美东时间

A

CCESS

P

ORT

P

插件

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

L

INE

I

覆盖整个院落

P

插件

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

S

UPPLY

P

插件

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

L

和

克对

ACKAGE

P

INOUT

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

10

MM

CSBGA P

IN

C

ONFIGURATION

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

并行端口...................................................................................................................................33

R

EGISTER

M

AP

............................................................................................................................................33

编程MODEL.....................................................................................................................39

6.1 P

OWER

-U

P

S

EQUENCE

.................................................................................................................................40

6.1.1

主模式Register.........................................................................................................................40

6.2 I

NTERRUPT

H

ANDLING

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

6.3 S

TATUS

R

EGISTERS

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

6.4 I

载文信息

R

EGISTERS

...........................................................................................................................42

6.5 I

NTERRUPT

I

载文信息

R

EGISTERS

........................................................................................................42

7.

8.

9.

9.1

9.2

9.3

9.4

10.

10.1

10.2

10.3

11.

11.1

特殊每通道寄存器操作............................................ ........................... 43

CLOCK地图............................................................................................................................................45

T1成帧器/ FORMATTER控制和状态寄存器.......................................... ..46

T1

ONTROL

R

EGISTERS

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

T1 T

RANSMIT

T

RANSPARENCY

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

AIS- CI

和

RAI -CI摹

生成及

D

ETECTION

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

T1

ECEIVE

-S

IDE

D

IGITAL

-M

ILLIWATT

C

ODE

G

eneration

.....................................................................52

E1成帧器/ FORMATTER控制和状态寄存器.......................................... ..55

E1

ONTROL

R

EGISTERS

.........................................................................................................................55

A

UTOMATIC

A

LARM

G

eneration

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

我E1

载文信息

R

EGISTERS

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

通用控制和状态寄存器............................................. ............................. 62

T1 / E1 S

TATUS

R

EGISTERS

......................................................................................................................63

2 238

DS2155

12.

13.

13.1

14.

I / O引脚配置OPTIONS.................................................................................................69

环回配置..........................................................................................................71

P

ER

-C

HANNEL

L

OOPBACK

......................................................................................................................73

错误计数寄存器...............................................................................................................75

14.1

L

INE

-C

ODE

V

IOLATION

C

'mount

R

EGISTER

(LCVCR).............................................................................76

14.1.1 T1 Operation.......................................................................................................................................76

14.1.2 E1 Operation.......................................................................................................................................76

14.2

P

ATH

C

ODE

V

IOLATION

C

'mount

R

EGISTER

（ PCVCR ） .............................. ............................. 78

14.2.1 T1 Operation.......................................................................................................................................78

14.2.2 E1 Operation.......................................................................................................................................78

14.3

F

RAMES

O

UT

-

OF

-S

YNC

C

'mount

R

EGISTER

(FOSCR)..............................................................................79

14.3.1 T1 Operation.......................................................................................................................................79

14.3.2 E1 Operation.......................................................................................................................................79

14.4

E- B

IT

C

OUNTER

(EBCR).........................................................................................................................80

15.

16.

DS0监控功能...........................................................................................................81

信令操作.....................................................................................................................83

16.1

R

ECEIVE

S

ignaling

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

基于处理器16.1.1 Signaling.................................................................................................................83

16.1.2基于硬件的接收信号...................................................................................................84

16.2

T

RANSMIT

S

ignaling

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

16.2.1处理器的模式.......................................................................................................................89

16.2.2软件信号插入使能寄存器， E1 CAS模式..................................... ..................... 93

16.2.3软件信号插入使能寄存器， T1模式...................................... ............................ 95

基于硬件16.2.4 Mode.......................................................................................................................95

17.

17.1

18.

19.

每信道空闲码生成............................................ ........................................ 96

I

DLE

-C

ODE

P

AGC软件

E

XAMPLES

..................................................................................................97

通道阻滞寄存器............................................... ................................................. 101

弹性存储器OPERATION........................................................................................................104

19.1

R

ECEIVE

S

IDE

........................................................................................................................................107

19.1.1 T1模式............................................................................................................................................107

19.1.2 E1 Mode............................................................................................................................................107

19.2

T

RANSMIT

S

IDE

.....................................................................................................................................107

19.2.1 T1模式............................................................................................................................................108

19.2.2 E1 Mode............................................................................................................................................108

19.3

E

LASTIC

S

TORES

I

NITIALIZATION

.........................................................................................................108

19.4

M

最小值：

D

ELAY

M

ODE

.......................................................................................................................108

20.

21.

G.706中级CRC- 4更新（ E1模式） ..................................... .............. 109

T1面向位的代码（ BOC ）控制器......................................... ................................. 110

21.1

T

RANSMIT

BOC.....................................................................................................................................110

发送BOC ..............................................................................................................................................110

21.2

R

ECEIVE

中国银行.......................................................................................................................................110

收到BOC.................................................................................................................................................110

22.

附加（ SA ）和国际（ SI ）位操作（仅限于E1 ） ...................... 113

3的238

DS2155

22.1

22.2

22.3

23.

M

ETHOD

1: H

ARDWARE

S

CHEME

.........................................................................................................113

M

ETHOD

2: I

NTERNAL

R

EGISTER

S

CHEME

B

ASED ON

D

OUBLE

-F

RAME

..............................................113

M

ETHOD

3: I

NTERNAL

R

EGISTER

S

CHEME

B

ASED ON

CRC4 M

ULTIFRAME

........................................116

HDLC控制器........................................................................................................................126

23.1

B

ASIC

O

PERATION

D

ETAILS

..................................................................................................................126

23.2

HDLC

ONFIGURATION

........................................................................................................................126

23.2.1 FIFO Control....................................................................................................................................130

23.3

HDLC M

APPING

....................................................................................................................................131

23.3.1接收..............................................................................................................................................131

23.3.2发送............................................................................................................................................133

23.3.3 FIFO信息.............................................................................................................................138

23.3.4接收数据包字节Available........................................................................................................138

23.3.5 HDLC的FIFO ....................................................................................................................................139

23.4

R

ECEIVE

HDLC

ODE

E

XAMPLE

..........................................................................................................140

23.5

L

EGACY

FDL S

UPPORT

（ T1 M

ODE

)......................................................................................................140

23.5.1概述...........................................................................................................................................140

23.5.2接收部分.................................................................................................................................140

23.5.3发送部分...............................................................................................................................142

23.6

D4 / SLC -96

PERATION

........................................................................................................................142

24.

线路接口单元（ LIU） ...........................................................................................................143

24.1

刘

PERATION

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

24.2

R

ECEIVER

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

24.2.1接收电平指示器和阈值中断......................................... .................................... 144

24.2.2接收G.703同步信号（ E1模式） ..................................... ...................................... 144

24.2.3监控模式...................................................................................................................................144

24.3

T

变送器

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

24.3.1发送短路检测器/限幅器........................................ .................................................. 145

24.3.2发送开路Detector.......................................................................................................145

24.3.3发送BPV错误插入..........................................................................................................145

24.3.4发送G.703同步信号（ E1模式） ..................................... .................................... 145

24.4

MCLK P

重新依比例调整

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

24.5

J

伊特尔

A

TTENUATOR

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

24.6

CMI （C

ODE

M

ARK

I

n版本

) O

PTION

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

24.7

刘成

ONTROL

R

EGISTERS

.....................................................................................................................147

24.8

R

ECOMMENDED

C

IRCUITS

.....................................................................................................................156

24.9

C

OMPONENT

S

PECIFICATIONS

...............................................................................................................158

25.

26.

26.1

26.2

26.3

26.4

26.5

26.6

27.

可编程带内循环代码生成和检测...................... 163

BERT功能..................................................................................................................................170

S

TATUS

..................................................................................................................................................170

M

APPING

...............................................................................................................................................170

BERT

EGISTER

D

ESCRIPTIONS

...........................................................................................................172

BERT

EPETITIVE

P

ATTERN

S

ET

..........................................................................................................176

BERT B

IT

C

OUNTER

.............................................................................................................................177

BERT ê

RROR

C

OUNTER

........................................................................................................................178

有效载荷ERROR -插入函数（ T1模式） ........................................ ........ 180

27.1

N

棕土

-

OF

-E

RRORS

R

EGISTERS

..........................................................................................................182

27.1.1数-的，左的错误Register........................................................................................................183

28.

交错PCM总线操作（ IBO ） ........................................... .................................... 184

4 238

DS2155

28.1

28.2

29.

30.

31.

32.

33.

34.

34.1

34.2

34.3

34.4

34.5

34.6

35.

35.1

35.2

36.

37.

37.1

37.2

37.3

37.4

37.5

38.

38.1

38.2

C

HANNEL

I

NTERLEAVE

.........................................................................................................................184

F

RAME

I

NTERLEAVE

..............................................................................................................................184

扩展系统信息总线（ ESIB ） ........................................... ............................ 187

可编程背板时钟合成器.............................................. .......... 191

部分T1 / E1支持.........................................................................................................191

用户可编程输出引脚上............................................. ........................................... 193

TRANSMIT流程图.........................................................................................................194

JTAG边界扫描结构和测试访问端口................................. 199

D

ESCRIPTION

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

I

NSTRUCTION

R

EGISTER

........................................................................................................................202

T

美东时间

R

EGISTERS

....................................................................................................................................204

B

OUNDARY

S

可以

R

EGISTER

.................................................................................................................204

B

YPASS

R

EGISTER

.................................................................................................................................204

I

DENTIFICATION

R

EGISTER

....................................................................................................................204

功能时序DIAGRAMS.................................................................................................208

T1 M

ODE

...............................................................................................................................................208

E1 M

ODE

...............................................................................................................................................213

操作参数..............................................................................................................222

AC时序参数和图表............................................. .................................. 224

M

ULTIPLEXED

B

US

AC - C

极特

..........................................................................................224

N

ONMULTIPLEXED

B

US

AC - C

极特

...................................................................................227

R

ECEIVE

-S

IDE

AC - C

极特

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

B

无源底板

C

LOCK

T

即时通信

： AC - C

极特

.........................................................................233

T

RANSMIT

AC - C

极特

........................................................................................................234

封装信息................................................................................................................237

100-P

IN

LQFP （ 56 G5002-000 ） ............................................................................................................237

100-B

所有

CSBGA （ 56 G6008-001 ） .....................................................................................................238

5 238