CMX208 datasheet, PDF - EEWORLD Datasheet

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CMX208: DescriptionISDN Dual Telephony Protocol Engine; File Size320KB，25 Pages; ManufacturerCML Microcircuits; Websitehttp://www.cmlmicro.com/

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CMX208 Overview

ISDN Dual Telephony Protocol Engine

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CMX208

ISDN Dual Telephony

Protocol Engine

D/208/1 October 1999

Advance Information

Features

•

Applications

•

Supports Incoming and Outgoing Calls

Independent Port Configuration

Flexible B-channel Mapping

Supports CTR3 Approval

Full API Available

Feature Phones

Pay-Phones

PABX Telephones

DECT Cordless Phones

Reference Designs Available

1.1

Brief Description

The CMX208 is an ISDN telephony protocol engine which implements the lower level ISDN interface and

communicates with the CMX605 and other standard devices to form a fully integrated ISDN chipset for voice

communications. The CMX208 puts all the main data processing elements in a single device. No ISDN

software has to be written and simple ‘Plug and Play’ design results. This reduces development time and

provides a highly cost-effective hardware solution. By using proven circuit designs, the designer can move

quickly from initial concept through design in to manufacture.

The CMX208 supports two voice ports over the ISDN line, which can be used to provide ISDN telephony

services or POTS line interfaces, and has independent keypad-configuration of these services for each port.

The CMX208’s feature set and architecture allow most analogue systems to be converted to an ISDN

equivalent with enhanced features.

The CMX208 is designed to work with the AMD 79C30 S/T bus interface, the Motorola MC145480 PCM codec

and the CML CMX605 POTS interface circuit, and also comes complete with embedded applications software.

To support the CMX208, CML can also provide licensed reference designs on user request. A flexible

Applications Program Interface (API) allows users to customise the features and operation of their own design.

The CMX208 comes in a compact 80-pin surface mount package.

1999

Consumer Microcircuits Limited

1999

Chiron Technology Limited

ISDN Dual Telephony Protocol Engine

CMX208

CONTENTS

Section

Page

1.0 Features and Applications .........................................................................1

1.1 Brief Description.........................................................................................1

1.2 Block Diagram ............................................................................................3

1.3 Signal List ...................................................................................................4

1.4 External Components.................................................................................8

1.5 General Description....................................................................................9

1.5.1 Glossary

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

1.5.2 Initialisation...............................................................................11

1.5.3 ISDN Interface............................................................................11

1.5.3.1 Activation.....................................................................11

1.5.3.2 De-activation or Line Disconnection .............................11

1.5.3.3 Line Failure Detection ..................................................11

1.5.3.4 Incoming Calls .............................................................11

1.5.3.5 Multiple Subscriber Numbering.....................................12

1.5.3.6 Channel Mapping.........................................................12

1.5.4 POTS Configuration..................................................................13

1.5.4.1 Configuration and Control via DTMF Keypad................13

1.5.5 POTS Operation

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

1.5.5.1 Keypad Operation ........................................................15

1.5.5.2 Incoming POTS Calls...................................................15

1.5.5.3 Outgoing POTS Calls...................................................15

1.5.5.4 Connected Calls...........................................................16

1.5.5.5 Call Clearing ................................................................16

1.5.6 Application Programmer's Interface

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

1.5.7 Hardware Description

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

1.5.7.1 LED Status Indicators (LED1 to LED9, and ILFI)..........17

1.6 Application Notes .....................................................................................18

1.6.1 General

......................................................................................18

1.6.2 Approvals

..................................................................................18

1.7 Performance Specification.......................................................................19

1.7.1 Electrical Performance..............................................................19

1.7.1.1 Absolute Maximum Ratings..........................................19

1.7.1.2 Operating Limits...........................................................19

1.7.1.3 Operating Characteristics.............................................20

1.7.2 Packaging..................................................................................25

Note:

This product is in development: Changes and additions will be made to this

specification. Items marked TBD or left blank will be included in later issues.

Information in this data sheet should not be relied upon for final product design.

1999

Consumer Microcircuits Limited

1999

Chiron Technology Limited

D/208/1

CMX208 Related Products

	CMX208	CMX208S1
Description	ISDN Dual Telephony Protocol Engine	ISDN Dual Telephony Protocol Engine

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