DS3112RD [MAXIM]

DS3/E3 Multiplexer Reference Design; DS3 / E3多路复用器参考设计


型号：	DS3112RD
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	DS3/E3 Multiplexer Reference Design DS3 / E3多路复用器参考设计复用器
文件：	总12页 (文件大小：660K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DS3112RD

DS3/E3 Multiplexer Reference Design

www.maxim-ic.com

GENERAL DESCRIPTION

FEATURES

The DS3112RD is a reference design for the DS3112

DS3/E3 framer/mux and the DS3150 DS3/E3 LIU.

Both devices are surface mounted to minimize board

size and to provide signal integrity. The

DK101/DK2000 motherboard and included software

give point-and-click access to configuration and

status registers from a Windows^®-based PC. LEDs

on the board indicate loss-of-signal, transmit driver

monitor, and PRBS sync status of the LIU. The board

provides BNC connectors for an external clock, the

line-side transmit and receive differential pairs, and a

connector for data path interface. A PLD provides

registered access to the LIU control pins along with

control of clock and data paths.

Cꢀ Soldered DS3150 and DS3112

Cꢀ BNC Connectors, Transformers, and Termination

Passives for the LIU

Cꢀ Careful Layout for Analog Signal Paths

Cꢀ Memory-Mapped PLD for Control of DS3150

Cꢀ BNC Connectors for External Clock and Line-

Side Interface

Cꢀ Compatible with DK101 and DK2000 Demo Kit

Motherboards

Cꢀ DK101/DK2000 and Included Software Provide

Point-and-Click Access to the DS3112 Register

Set

Cꢀ LEDs for Loss-of-Signal, Transmit Driver Monitor,

Each DS3112RD is shipped with a free DK101

motherboard. For complex applications, the DK2000

high-performance demo kit motherboard can be

purchased separately.

and PRBS Sync

Windows is a registered trademark of Microsoft Corp.

REFERENCE DESIGN CONTENTS

DS3112RD Daughter Card

DK101 Demo Kit Motherboard

CD-ROM

ChipView Software

DS3112RD.DEF Definition File

DS3112.DEF Definition File

DS3112RD Data Sheet

DS3112 Data Sheet

DS3150 Data Sheet

ORDERING INFORMATION

PART

DESCRIPTION

DS3112RD

DS3112 Reference Design

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REV: 082103

DS3112RD DS3/E3 Multiplexer Reference Design

COMPONENT LIST

DESIGNATION

QTY

DESCRIPTION

SUPPLIER

PART

C1–C16, C20–C27

Panasonic

ECJ-3VB1E104K

0.1ꢀF 10%, 25V ceramic capacitors (1206)

C17–C19

C28–C30

DS1–DS4

J1, J2

Panasonic

Trompeter

Cambridge

Samtec

ECU-V1H473KBW

ECS-T1CX106R

LN1251C

0.047ꢀF 10%, 50V ceramic capacitors (1206)

10ꢀF 20%, 16V tantalum capacitors (B case)

LED, red, SMD

5-pin, right-angle, BNC connectors

5-pin, vertical, BNC connector

50-pin jumper, dual row

UCBJR220

CP-BNCPC-004

TFM-125-02-S-D-LC

S2012-05-ND

ERJ-8ENF1002V

ERJ-8GEYJ0R00V

ERA-6YEB331V

ERJ-8GEYJ750V

PE-65968

J4–J6

10-pin, dual row, vertical connector

10kꢁ 1%, 1/8W resistors (1206)

0ꢁ 5%, 1/8W resistors (1206)

330ꢁ 0.1%, 1/10W MF resistors (0805)

75ꢁ 5%, 1/8W resistor (1206)

XFMR, 1-to-2 count, 6-pin SMT

Testpoint, 1 plated thru-hole

T3/E3 mux/framer

Digi-Key

R1–R4, R8, R14,

R500

Panasonic

R5, R10

R6, R7, R9,

R11–R13

R501

T1, T2

TP1–TP17

Pulse

Engineering

—

Dallas

DS3112

Semiconductor

Dallas

T3/E3/STS-1 line interface

DS3150T

Semiconductor

IC, hex interverter, SO

Toshiba

TC74HC04AFN

EPM7128AETC100-10

74LVC157APW DH

IC, PLD, 100-pin TQFP

Altera

IC, MUX, quad 2INPUT

Philips

BOARD FLOORPLAN

LED

Rx BNC

TRANSFORMER

Dallas

Semiconductor

DS3150

DS3112

PLD

Tx BNC

TRANSFORMER

EXT

CLOCK

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DS3112RD DS3/E3 Multiplexer Reference Design

PLD MEMORY MAP

The PLD on the DS3112RD is used to route clocks from the processor board DK2000/DK101 and to control the

DS3150 and the DS3112. The PLD is mapped at address 00h and contains 25 registers. The first eight registers

(excluding register address 01h, which has no function on the 3112RD) are read-only, and are programmed at the

factory to document board identification and revision information. The next 16 registers control the state of pins on

the DS3150 and DS3112. The last register controls the clock source to the FTCLK pin on the DS3112 and the

MCLK pin on the DS3150. The PLD provides tri-state control of the pins. If a 01h is written to a register, the

corresponding pin is forced high, a value of 00h forces the pin low, and writing any other value puts the pin in a tri-

state mode. The bit descriptions in the definition file for the DS3112RD describe how to control a pin specifically

(Table 1). For more information about definition files, refer to the DK101 data sheet or the DK2000 data sheet.

MEMORY MAP

The DS3112 is mapped at 1000h.

Table 1. DS3112RD CPLD Register Map

DEFAULT

OFFSET

NAME

TYPE

DESCRIPTION

VALUE

0x0D

0x00

0x01

—

0X0000

0X0002

0X0003

0X0004

0X0005

0X0006

0X0007

0X0011

0X0012

0X0013

0X0014

0X0015

0X0016

0X0017

0X0018

0X0019

0X001A

0X001B

0X001C

0X001D

0X001E

0X001F

0X0020

0X0021

BID

XBIDH

XBIDM

XBIDL

BREV

AREV

TDS0

Read-Only

Read-Write

Board ID

High Nibble Extended Board ID

Middle Nibble Extended Board ID

Low Nibble Extended Board ID

Board FAB Revision

Board Assembly Revision

PLD Revision

DS3150 Transmit Data Select 0

DS3150 Transmit Data Select 1

DS3150 Enhanced Feature Enable

DS3150 Invert Clock Enable

DS3150 Loopback Select

DS3150 Receive Monitor Mode

DS3150 T3/E3/STS-1 Select

DS3150 Transmit Tri-State

DS3150 Zero Code Suppression

DS3150 Line Build-Out

—

0x00

0x01

0x00

0x01

0x00

0x01

0x00

0x01

0x00

0x01

TDS1

EFE

ICE

LBKS

RMON

TESS

TTS

ZCSE

LBO

RST

MUXSEL

G747E

T3E3MS

FRMECU

FTMEI

T3E3CLK

DS3112 Reset

DS3112RD Data Path Mux

DS3112 G747 Mode Enable

DS3112 T3/E3 Mode Select

DS3112 Error Counter Strobe

DS3112 Error Insert Strobe

DS3112RD Clock Select

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DS3112RD DS3/E3 Multiplexer Reference Design

LINE-SIDE CONNECTIONS

The DS3112RD implements the transmit (Tx) and receive (Rx) line interface networks recommended in the

DS3150 data sheet (Figure 1). The BNC connectors are labeled J1 (Tx) and J2 (Rx).

Figure 1. Line-Side Circuitry

TRANSMIT

LIU

TXP

330ꢁ

(1%)

0.05ꢀF

TXN

1:2ct

DS3150

RXP

RECEIVE

330ꢁ

(1%)

0.05ꢀF

RXN

1:2ct

INTERFACE CONNECTOR

Two 50-pin connectors (J4, J5) on the bottom of the board provide the processor interface, clocks, and power

supply from the DK101 or DK2000 motherboards. These connectors also provide a bidirectional clock/data/sync

connection with the DK2000. The third connector (J6) is provided for future expansion on the DK2000 and is not

connected on the DS3112RD.

CONNECTING TO A COMPUTER

Refer to the DK101 data sheet or the DK2000 data sheet for information.

BASIC OPERATION

The DS3112RD powers up in the T3 mode, transmitting all ones, as specified by the default values in the CPLD

registers (Table 1) and the DS3112’s reset condition. The processor interface supplies the transmit clock by

default. The user must access registers in the DS3112 and the CPLD to configure the board. To facilitate

configuration, definition files that support the DS3112 reference design (DS3112.DEF, DS3112RD.DEF) can be

downloaded from our website, www.maxim-ic.com/DS3112RD.

DS3112RD INFORMATION

For more information about the DS3112RD—including the ChipView software, the latest support files (.DEF, .INI,

etc.), and the latest data sheet—please visit our website at www.maxim-ic.com/DS3112RD.

DS3112 INFORMATION

For more information about the DS3112, please consult the DS3112 data sheet, available on our website at

www.maxim-ic.com/DS3112.

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DS3112RD DS3/E3 Multiplexer Reference Design

DS3150 INFORMATION

For more information about the DS3150, please consult the DS3150 data sheet, available on our website at

www.maxim-ic.com/DS3150.

DK101/DK2000 INFORMATION

For more information about the DK101 or DK2000, please consult their respective data sheets, available on our

website at www.maxim-ic.com/DK101 and www.maxim-ic.com/DK2000.

TECHNICAL SUPPORT

For additional technical support, please e-mail your questions to telecom.support@dalsemi.com.

Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product.

No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

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2003 Maxim Integrated Products Printed USA

DS3112RD [MAXIM]

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