CX20493-25/APP datasheet, PDF - EEWORLD Datasheet

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CX20493-25/APP: DescriptionModem-Support Circuit, 56kbps Data, 14.4kbps Fax, PQFP32, LQFP-32; CategoryWireless rf/communication Telecom circuit; File Size657KB，92 Pages; ManufacturerCONEXANT; Websitehttp://www.conexant.com/

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CX20493-25/APP Overview

Modem-Support Circuit, 56kbps Data, 14.4kbps Fax, PQFP32, LQFP-32

CX20493-25/APP Parametric

Parameter Name	Attribute value
Maker	CONEXANT
Parts packaging code	QFP
package instruction	LQFP,
Contacts	32
Reach Compliance Code	compliant
data rate	56 Mbps
Fax rate	14.4 kbps
JESD-30 code	S-PQFP-G32
length	7 mm
Number of functions	1
Number of terminals	32
Maximum operating temperature	70 °C
Minimum operating temperature
Package body material	PLASTIC/EPOXY
encapsulated code	LQFP
Package shape	SQUARE
Package form	FLATPACK, LOW PROFILE
Certification status	Not Qualified
Maximum seat height	1.6 mm
Nominal supply voltage	3.3 V
surface mount	YES
Telecom integrated circuit types	MODEM-SUPPORT CIRCUIT
Temperature level	COMMERCIAL
Terminal form	GULL WING
Terminal pitch	0.8 mm
Terminal location	QUAD
width	7 mm

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CX81801-7x/8x

SmartV.XX

V.92/V.34/V.32bis Modem in 128-Pin LQFP

with CX20493 SmartDAA in 32-Pin LQFP

and Optional CX20442 Voice Codec

Data Sheet

Doc. No. 102247B

October 30, 2003

CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet

Revision Record

Revision

Date

8/27/2003

10/30/2003

Comments

Initial release.

Rev. B release.

Information in this document is provided in connection with Conexant Systems, Inc. (“Conexant”) products. These materials are

provided by Conexant as a service to its customers and may be used for informational purposes only. Conexant assumes no

responsibility for errors or omissions in these materials. Conexant may make changes to specifications and product descriptions at

any time, without notice. Conexant makes no commitment to update the information and shall have no responsibility whatsoever for

conflicts or incompatibilities arising from future changes to its specifications and product descriptions.

No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as

provided in Conexant’s Terms and Conditions of Sale for such products, Conexant assumes no liability whatsoever.

THESE MATERIALS ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,

RELATING TO SALE AND/OR USE OF CONEXANT PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO

FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTAL DAMAGES, MERCHANTABILITY, OR

INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. CONEXANT FURTHER

DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS

CONTAINED WITHIN THESE MATERIALS. CONEXANT SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL,

OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS, WHICH MAY

RESULT FROM THE USE OF THESE MATERIALS.

Conexant products are not intended for use in medical, lifesaving or life sustaining applications. Conexant customers using or selling

Conexant products for use in such applications do so at their own risk and agree to fully indemnify Conexant for any damages

resulting from such improper use or sale.

The following are trademarks of Conexant Systems, Inc.: Conexant and the Conexant C symbol, SmartDAA, and Modem-on-

Hold. Product names or services listed in this publication are for identification purposes only, and may be trademarks of third

parties. Third-party brands and names are the property of their respective owners.

For additional disclaimer information, please consult Conexant’s Legal Information posted at www.conexant.com, which is

incorporated by reference.

Reader Response:

Conexant strives to produce quality documentation and welcomes your feedback. Please send comments and

suggestions to tech.pubs@conexant.com. For technical questions, contact your local Conexant sales office or field applications

engineer.

Conexant

102247B

CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet

Contents

1. Introduction..........................................................................................................................................1-1

1.1

1.2

1.3

Overview ......................................................................................................................................................................... 1-1

Applications .................................................................................................................................................................... 1-2

Features .......................................................................................................................................................................... 1-4

1.3.1

General Modem Features................................................................................................................................ 1-4

1.3.2

SmartDAA Features ........................................................................................................................................ 1-5

1.3.3

Applications.................................................................................................................................................... 1-5

Technical Overview......................................................................................................................................................... 1-6

1.4.1

General Description ........................................................................................................................................ 1-6

1.4.2

MCU Firmware................................................................................................................................................ 1-6

1.4.3

Operating Modes ............................................................................................................................................ 1-6

1.4.3.1

Data/Fax Modes.......................................................................................................................... 1-6

1.4.3.2

V.44 Data Compression.............................................................................................................. 1-7

1.4.3.3

Worldwide Operation.................................................................................................................. 1-7

1.4.3.4

TAM Mode.................................................................................................................................. 1-8

1.4.3.5

Speakerphone Mode (S Models)................................................................................................ 1-9

1.4.4

Reference Designs.......................................................................................................................................... 1-9

Hardware Description ..................................................................................................................................................... 1-9

1.5.1

CX81801 Modem Device ................................................................................................................................ 1-9

1.5.2

Digital Isolation Barrier................................................................................................................................. 1-10

1.5.3

CX20493 SmartDAA Line Side Device.......................................................................................................... 1-10

1.5.4

CX20442 Voice Codec .................................................................................................................................. 1-10

AT Commands .............................................................................................................................................................. 1-10

Serial DTE Interface Operation........................................................................................................................................ 2-1

2.1.1

Automatic Speed/Format Sensing .................................................................................................................. 2-1

Parallel Host Bus Interface Operation............................................................................................................................. 2-2

Establishing Data Modem Connections .......................................................................................................................... 2-2

2.3.1

Dialing ............................................................................................................................................................ 2-2

2.3.2

Telephone Number Directory.......................................................................................................................... 2-2

2.3.3

Modem Handshaking Protocol ....................................................................................................................... 2-2

2.3.4

Call Progress Tone Detection ......................................................................................................................... 2-2

2.3.5

Answer Tone Detection................................................................................................................................... 2-2

2.3.6

Ring Detection................................................................................................................................................ 2-2

2.3.7

Billing Protection ............................................................................................................................................ 2-3

2.3.8

Connection Speeds......................................................................................................................................... 2-3

2.3.9

Automode ....................................................................................................................................................... 2-3

1.4

1.5

1.6

2.1

2.2

2.3

2. Technical Specifications .......................................................................................................................2-1

102247B

Conexant

iii

CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet

2.4

Data Mode ...................................................................................................................................................................... 2-4

2.4.1

Speed Buffering (Normal Mode) .................................................................................................................... 2-4

2.4.2

Flow Control ................................................................................................................................................... 2-4

2.4.3

Escape Sequence Detection............................................................................................................................ 2-4

2.4.4

BREAK Detection ............................................................................................................................................ 2-4

2.4.5

Telephone Line Monitoring............................................................................................................................. 2-4

2.4.6

Fall Forward/Fallback (V.92/V.90/V.34/V.32 bis/V.32) ................................................................................... 2-4

2.4.7

Retrain ............................................................................................................................................................ 2-5

2.4.8

Programmable Inactivity Timer ...................................................................................................................... 2-5

2.4.9

DTE Signal Monitoring (Serial DTE Interface Only) ........................................................................................ 2-5

V.92 Features.................................................................................................................................................................. 2-5

2.5.1

Modem-on-Hold ............................................................................................................................................. 2-5

2.5.2

Quick Connect ................................................................................................................................................ 2-6

2.5.3

PCM Upstream ............................................................................................................................................... 2-6

Error Correction and Data Compression......................................................................................................................... 2-6

2.6.1

V.42 Error Correction ..................................................................................................................................... 2-6

2.6.2

MNP 2-4 Error Correction .............................................................................................................................. 2-6

2.6.3

V.44 Data Compression.................................................................................................................................. 2-6

2.6.4

V.42 bis Data Compression ............................................................................................................................ 2-6

2.6.5

MNP 5 Data Compression .............................................................................................................................. 2-7

Telephony Extensions..................................................................................................................................................... 2-7

2.7.1

Line In Use Detection ..................................................................................................................................... 2-7

2.7.2

Extension Pickup Detection ............................................................................................................................ 2-7

2.7.3

Remote Hangup Detection.............................................................................................................................. 2-8

Fax Class 1 and Fax Class 1.0 Operation ........................................................................................................................ 2-8

Point-of-Sales Support ................................................................................................................................................... 2-8

Voice/Audio Mode .......................................................................................................................................................... 2-8

2.10.1

Online Voice Command Mode ........................................................................................................................ 2-8

2.10.2

Voice Receive Mode ....................................................................................................................................... 2-8

2.10.3

Voice Transmit Mode ..................................................................................................................................... 2-9

2.10.4

Full-Duplex Receive and Transmit Mode ........................................................................................................ 2-9

2.10.5

Audio Mode .................................................................................................................................................... 2-9

2.10.6

Tone Detectors ............................................................................................................................................... 2-9

2.10.7

Speakerphone Mode....................................................................................................................................... 2-9

V.80 Synchronous Access Mode (SAM) - Video Conferencing...................................................................................... 2-9

Full-Duplex Speakerphone (FDSP) Mode (S Models)................................................................................................... 2-10

Caller ID ........................................................................................................................................................................ 2-10

Worldwide Country Support ......................................................................................................................................... 2-10

Diagnostics ................................................................................................................................................................... 2-11

2.15.1

Commanded Tests........................................................................................................................................ 2-11

2.15.2

Power On Reset Tests .................................................................................................................................. 2-11

Low Power Sleep Mode ................................................................................................................................................ 2-12

2.5

2.6

2.7

2.8

2.9

2.10

2.11

2.12

2.13

2.14

2.15

2.16

Conexant

102247B

CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet

3. Hardware Interface ...............................................................................................................................3-1

3.1

CX81801 Modem Hardware Pins and Signals ................................................................................................................ 3-1

3.1.1

Common to Parallel and Serial Interface Configurations................................................................................ 3-1

3.1.1.1

LSD Interface (Through DIB)...................................................................................................... 3-1

3.1.1.2

Call Progress Speaker Interface ................................................................................................. 3-1

3.1.1.3

Voice Relay Interface (S Models) ............................................................................................... 3-1

3.1.1.4

Serial EEPROM Interface............................................................................................................ 3-1

3.1.1.5

External Bus Interface ................................................................................................................ 3-2

3.1.2

Serial Interface Configuration Only................................................................................................................. 3-2

3.1.2.1

Serial DTE Interface and Indicator Outputs (PARIF = Low)........................................................ 3-2

3.1.3

Parallel Interface Configuration Only (PARIF = High)..................................................................................... 3-3

3.1.3.1

Parallel Host Bus Interface ......................................................................................................... 3-3

3.1.4

CX81801 Modem Interface Signals................................................................................................................ 3-3

CX20493 LSD Hardware Pins and Signals ................................................................................................................... 3-22

3.2.1

CX20493 LSD Signal Summary.................................................................................................................... 3-22

3.2.1.1

CX81801 Interface (Through DIB)............................................................................................ 3-22

3.2.1.2

Telephone Line Interface .......................................................................................................... 3-22

3.2.1.3

Voltage References................................................................................................................... 3-22

3.2.1.4

General Purpose Input/Output.................................................................................................. 3-23

3.2.1.5

No Connects ............................................................................................................................. 3-23

3.2.2

CX20493 LSD Pin Assignments and Signal Definitions ............................................................................... 3-23

CX20442 VC Hardware Pins and Signals (S Models)................................................................................................... 3-28

3.3.1

CX20442 VC Signal Summary...................................................................................................................... 3-28

3.3.1.1

Speakerphone Interface............................................................................................................ 3-28

3.3.1.2

Telephone Handset/Headset Interface...................................................................................... 3-28

3.3.1.3

CX81801 Modem Interface....................................................................................................... 3-28

3.3.1.4

Host Interface........................................................................................................................... 3-28

3.3.2

CX20442 VC Pin Assignments and Signal Definitions ................................................................................. 3-29

Electrical and Environmental Specifications ................................................................................................................. 3-35

3.4.1

Operating Conditions, Absolute Maximum Ratings, and Power Requirements ........................................... 3-35

3.4.2

Interface and Timing Waveforms ................................................................................................................. 3-37

3.4.2.1

External Memory Bus Timing ................................................................................................... 3-37

3.4.2.2

Parallel Host Bus Timing .......................................................................................................... 3-39

3.4.2.3

Serial DTE Interface.................................................................................................................. 3-41

Crystal Specifications ................................................................................................................................................... 3-42

3.2

3.3

3.4

3.5

4. Package Dimensions ............................................................................................................................4-1

5. Parallel Host Interface ..........................................................................................................................5-1

5.1

5.2

Overview ......................................................................................................................................................................... 5-1

Register Signal Definitions ............................................................................................................................................. 5-3

5.2.1

IER - Interrupt Enable Register (Addr = 1, DLAB = 0) .................................................................................... 5-3

5.2.2

FCR - FIFO Control Register (Addr = 2, Write Only) ....................................................................................... 5-4

5.2.3

IIR - Interrupt Identifier Register (Addr = 2) .................................................................................................. 5-5

5.2.4

LCR - Line Control Register (Addr = 3) .......................................................................................................... 5-6

5.2.5

MCR - Modem Control Register (Addr = 4).................................................................................................... 5-7

5.2.6

LSR - Line Status Register (Addr = 5)............................................................................................................ 5-7

5.2.7

MSR - Modem Status Register (Addr = 6) ..................................................................................................... 5-9

5.2.8

RBR - RX Buffer (Receiver Buffer Register) (Addr = 0, DLAB = 0) ................................................................ 5-9

5.2.9

THR - TX Buffer (Transmitter Holding Register) (Addr = 0, DLAB = 0).......................................................... 5-9

102247B

Conexant

CX20493-25/APP Related Products

	CX20493-25/APP	CX20493-35/APP
Description	Modem-Support Circuit, 56kbps Data, 14.4kbps Fax, PQFP32, LQFP-32	Modem-Support Circuit, 56kbps Data, 14.4kbps Fax, PQFP32, LEAD FREE, LQFP-32
Maker	CONEXANT	CONEXANT
Parts packaging code	QFP	QFP
package instruction	LQFP,	LQFP,
Contacts	32	32
Reach Compliance Code	compliant	compliant
data rate	56 Mbps	56 Mbps
Fax rate	14.4 kbps	14.4 kbps
JESD-30 code	S-PQFP-G32	S-PQFP-G32
length	7 mm	7 mm
Number of functions	1	1
Number of terminals	32	32
Maximum operating temperature	70 °C	70 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	LQFP	LQFP
Package shape	SQUARE	SQUARE
Package form	FLATPACK, LOW PROFILE	FLATPACK, LOW PROFILE
Certification status	Not Qualified	Not Qualified
Maximum seat height	1.6 mm	1.6 mm
Nominal supply voltage	3.3 V	3.3 V
surface mount	YES	YES
Telecom integrated circuit types	MODEM-SUPPORT CIRCUIT	MODEM-SUPPORT CIRCUIT
Temperature level	COMMERCIAL	COMMERCIAL
Terminal form	GULL WING	GULL WING
Terminal pitch	0.8 mm	0.8 mm
Terminal location	QUAD	QUAD
width	7 mm	7 mm

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