MX COM Inc CMX208S1 Datasheet

CMX208

COMMUNICATION ICs

DATA BULLETIN

ISDN Dual Telephony

Protocol Engine

Advance Information

Features Applications

•

Supports ITU Specifications

•

Supports Incoming and Outgoing Calls

•

Independent Port Configuration

•

Supports CTR3 Approval

Full API Available

•

S/T Interface

CMX208

Parallel BUS

AM79C30

S/T BUS

Controller

+ Codec

IOM2 BUS

CLI

DTMF Rx

CMX605

•

Feature Phones

•

Pay-Phones

•

PABX Telephones

Reference Designs Available

•

Motorola

MC145480

PCM Codec

S L

POTS 2

DTMF Rx

CMX605

CLI

S L

POTS 1

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 analog 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 Siemens PSB-21525 HDLC formatter, the Motorola MC145480 PCM codec and the MX-COM CMX605 POTS interface circuit, and also comes complete with embedded applications software. To support the CMX208, MX-COM can also provide licensed reference designs on user request. A flexible Applications Program Interface (API) allows users to customize the features and operation of their own design. The CMX208 is available in an 80-pin QFP (CMX208S1) package.

The CMX208 is a data processor integrated circuit that supports the protocol layers 1, 2 and 3 of the ISDN protocol stack in accordance with the specifications of CCITT (now ITU). These specifications, which are widely used around the world, might not be supported withi n the U.S.

MX-COM, Inc 2000 MX-COM, Inc. 4800 Bethania Station Road, Winston-Salem, NC, 27105-1201, USA Doc. # 20480214.001 www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 2000 Chiron Technology Limited

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ISDN Dual Telephony Protocol Engine 2 CMX208 Advance Information

CONTENTS

Section Page

1. Block Diagram................................................................................................................3

2. Signal List.......................................................................................................................4

3. External Components....................................................................................................7

4. General Description.......................................................................................................8

4.1 Glossary............................................................................................................................... 9

4.2 Initialization ........................................................................................................................ 10

4.3 ISDN Interface.................................................................................................................... 10

4.3.1 Activation..............................................................................................................................10

4.3.2 De-activation or Line Disconnection.....................................................................................10

4.3.3 Line Failure Detection ..........................................................................................................10

4.3.4 Incoming Calls......................................................................................................................10

4.3.5 Multiple Subscriber Numbering............................................................................................11

4.3.6 Channel Mapping.................................................................................................................11

4.4 POTS Configuration........................................................................................................... 12

4.4.1 Configuration and Control via DTMF Keypad.......................................................................12

4.5 POTS Operation................................................................................................................. 13

4.5.1 Keypad Operation ................................................................................................................13

4.5.2 Incoming POTS Calls...........................................................................................................13

4.5.3 Outgoing POTS Calls...........................................................................................................13

4.5.4 Connected Calls...................................................................................................................14

4.5.5 Call Clearing.........................................................................................................................14

4.6 Application Programmer's Interface................................................................................... 14

4.7 Hardware Description......................................................................................................... 15

4.7.1 LED Status Indicators (LED1 to LED9, and ILFI).................................................................15

5. Application Notes ........................................................................................................16

5.1 General .............................................................................................................................. 16

5.2 Approvals........................................................................................................................... 16

6. Performance Specification..........................................................................................17

6.1 Electrical Performance....................................................................................................... 17

6.1.1 Absolute Maximum Ratings..................................................................................................17

6.1.2 Operating Limits...................................................................................................................17

6.1.3 Operating Characteristics.....................................................................................................18

6.2 Packaging .......................................................................................................................... 22

MX-COM, Inc. reserves the right to change specifications at any time and without notice.

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ISDN Dual Telephony Protocol Engine 3 CMX208 Advance Information

1. Block Diagram

SLIC

POTS Port 2

CMX605

DTMF Detector

and

Caller Display

LED Status

Indicators

System Memory

and NVRAM

Handler

Auxiliary

CODEC

Task Scheduler,

Memory Manager,

Timers and Task Mailing

SLIC

CMX605

DTMF Detector

and

Caller Display

LED Status

Indicators

POTS Port 1

Handler

Figure 1: Block Diagram

D-channel

Protocol

Stacks

LED Status

Indicator

ISDN

Interface

Chip

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ISDN Dual Telephony Protocol Engine 4 CMX208 Advance Information

2. Signal List

S1 Package Signal

Pin No. Name Type

1 SCL output EEPROM - Serial Clock 2 SDA bi-directional EEPROM - Serial Data 3 ISDNRST output ISDN S-interface Chip Reset 4 N/C output Do not make any connection to this pin 5 N/C output Do not make any connection to this pin 6 N/C output Do not make any connection to this pin 7

RST

DD1

input CMX208 Chip Reset (active low)

power

The digital positive supply rail. Levels and voltages are dependent upon this supply. This pin should be decoupled to DV

by a capacitor

XTAL

output The output of the on-chip Xtal oscillator inverter

10 XTAL input The input to the oscillator inverter from the Xtal circuit

SS1

power The digital negative supply rail (ground)

12 LED1 output POTS Port 1 Off-Hook Indicator (HK1) 13 LED2 output POTS Port 2 Off-Hook Indicator (HK2) 14 N/C output Do not make any connection to this pin 15 LED4 output POTS Port 2 Call Connected Indicator (CN2) 16 N/C output Do not make any connection to this pin 17 N/C output Do not make any connection to this pin 18 N/C output Do not make any connection to this pin 19 LED8 output ISDN Line Activated Indicator (AR) 20

output Watchdog Timer Stimulus

21 LED9 output POTS Port 1 Call Connected Indicator (CN1) 22

output Memory Write Access Strobe output Memory Read Access Strobe

24 A19 output Memory and Peripheral Address Bus 25 A18 output Memory and Peripheral Address Bus 26 A17 output Memory and Peripheral Address Bus 27 A16 output Memory and Peripheral Address Bus 28 A15 output Memory and Peripheral Address Bus 29 A14 output Memory and Peripheral Address Bus 30 A13 output Memory and Peripheral Address Bus 31 A12 output Memory and Peripheral Address Bus 32 A11 output Memory and Peripheral Address Bus 33 A10 output Memory and Peripheral Address Bus 34 A9 output Memory and Peripheral Address Bus 35 A8 output Memory and Peripheral Address Bus 36 A/D7 bi-directional Memory and Peripheral Address and Data Bus 37 A/D6 bi-directional Memory and Peripheral Address and Data Bus 38 A/D5 bi-directional Memory and Peripheral Address and Data Bus

Description

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ISDN Dual Telephony Protocol Engine 5 CMX208 Advance Information

S1 Package Signal

Description

Pin No. Name Type

39 A/D4 bi-directional Memory and Peripheral Address and Data Bus 40 A/D3 bi-directional Memory and Peripheral Address and Data Bus 41 A/D2 bi-directional Memory and Peripheral Address and Data Bus 42 A/D1 bi-directional Memory and Peripheral Address and Data Bus 43 A/D0 bi-directional Memory and Peripheral Address and Data Bus 44 ASTB output Address/Data Bus Strobe (data bus selected if low)

45 46 ~ input

SS0

power The digital negative supply rail (ground)

For manufacturer's use only. Connect to DV

directly

47 PSBRES output HDLC Chip Reset 48 RING2 output POTS Port 2 Ringing Generator (low when not ringing) 49

2RING

output POTS Port 2 Ringing Generator (high when not ringing)

50 API-RXD input API/RS232 Port Rx Data (inactive = high) 51 API-TXD output API/RS232 Port Tx Data (high when inactive) 52 CLIP2 output

POTS Port 2 Line Voltage Adjustment (low when sending FSK to a Caller Display unit. If low, it makes the SLIC present a high impedance to the POTS line)

B2B1/

output B-channel Select (high selects channel B1).

54 ILFI output ISDN Line Failure Indicator

DD0

power

The digital positive supply rail. Levels and voltages are dependent upon this supply. This pin should be decoupled to DV

by a capacitor

56 RING1 output POTS Port 1 Ringing Generator (low when not ringing) 57

1RING

58 CLIP1 output

output POTS Port 1 Ringing Generator (high when not ringing)

POTS Port 1 Line Voltage Adjustment (low when sending FSK to a Caller Display unit. If low, it makes the SLIC present a high impedance to the POTS line)

59 ILINE1 input

POTS Port 1 Hook Switch Status Detector (on-hook = low)

60 ILINE2 input

POTS Port 2 Hook Switch Status Detector

(on-hook = low) 61 REPLY input CMX605 C-BUS Interface - Reply Data 62

CMD-

output CMX605 C-BUS Interface - Command Data

DATA

63 SER-CLK output CMX605 C-BUS Interface - Serial Clock

power

The positive analog supply rail. Levels and voltages are

dependent upon this supply. This pin should be decoupled to

by a capacitor

65 66 67

68 69

AV AV

REF1

1CS 2CS

REF2 REF3

power power The negative analog supply rail (ground) output CMX605 C-BUS Interface (chip select POTS Port 1)

output CMX605 C-BUS Interface (chip select POTS Port 2) power

power

A/D Reference Voltage. Connect to AVDD directly

D/A Reference Voltage. Connect to AVDD directly

D/A Reference Voltage. Connect to AVSS directly

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ISDN Dual Telephony Protocol Engine 6 CMX208 Advance Information

S1 Package Signal

Description

Pin No. Name Type

71 NMI input

For manufacturer's use only. Connect to DV

directly

72 API-INT input API Interrupt (inactive = high) 73

IRQ

input CMX605 C-BUS Interface - Interrupt (inactive = high)

74 PSBINT input HDLC Chip Interrupt 75

∼ ∼

input input

For manufacturer’s use only. Connect to DV

DD DD

directly

directly 77 ISDNINT input ISDN S-interface Chip Interrupt 78

∼ ∼

input

For manufacturer’s use only. Connect to DV For manufacturer’s use only. Connect to DV

DD DD

directly

directly 80 N/C output Do not make any connection to this pin

Table 1: Signal List

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ISDN Dual Telephony Protocol Engine 7 CMX208 Advance Information

3. External Components

SCL

SDA

ISDNRST

N/C N/C N/C

RST

DD1

XTAL

SS1

LED1 LED2

N/C

LED4

N/C N/C N/C

LED8

CS2

CS1

REF1

SER-CLK

CMD-DATA

ILINE2 ILINE1 CLIP1

RING1 RING1 DV ILFI B1/B2 CLIP2 API-TXD API-RXD RING2 RING2 N/C (V ) DV ASTB A/D0

A/D1 A/D2

DD0

SS0

REF2

N/C

(V )

ISDNINT

(V )

IRQ

API-INT

NMI

REF3

CMX208S1

LED9

A19

A18

A17

A16

A15

A14

A13

A12

A11

A10

A/D7

A/D6

A/D5

A/D4

A/D3

Figure 2: CMX208 Pin-Out

This product is to be used as part of a chip-set. Please refer to the Applications Section (Section 5) for

Note:

details of the recommended chip-set.

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MX COM Inc CMX208S1 Datasheet

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Frequently Asked Questions

User Manual