XECOM XE3301I, XE3301G, XE3301F, XE3301B, XE3301 Datasheet

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xecom

XE3301

11-05-96

Multi-National 33,600 BPS Modem Module

Description

Xecom's XE3301 is a complete 33,600 bps modem in a single component. It is available for use in many countries throughout the world. Xecom offers versions for North America and Japan, Germany, France, the United Kingdom and other countries of the European Community.

The XE3301 is a complete modem including the DAA. XE3301 users do not need to add RAM, ROM, Crystals, transformers, or switches to complete the modem design. The user only needs to provide the TTL level, serial interface and the telephone jack.

The XE3301 is a full-featured modem. Besides the high-speed, XE3301 bps data transfer, the XE3301 supports data compression, error correction and fax transfer. The XE3301 also inlcudes NVRAM for permanent storage of the modem configuration.

The XE3301 is pin compatible with Xecom's XE2401, XE9601 and XE1401 modems. This family of modems permits a simple upgrade path from 2400 bps to 33,600 bps.

Features

* Models for North America, Japan, and Europe

Country

Model

Canada

XE3301

Japan

XE3301

France

XE3301F

Germany

XE3301G

Italy

XE3301I

UK

XE3301B

USA1

XE3301

1 (user transferable FCC Registration)

*Small Size: 2.75 inches by 1.38" by 0.42"

*Modem Protocols: V.34bis (33,600 bps), V.34, V.32bis, V.32, V.22bis, V.22, V.21, Bell 212A

and 103

*Fax Protocols: V.17 (14,400 bps), V.29, V.27ter, and V.21 channel 2

*Error Correction; V.42, MNP2-4 and MNP10

*Data Compression; V.42bis and MNP5 provides a maximum effective data rate of 133,400 bps.

*Pin compatible upgrade for Xecom's XE2401, XE9601, and XE1401 modems

Block Diagram

Serial I/O

/DTR /RTS

/CTS

/DSR

 

 

 

 

 

ROM

 

 

 

 

 

 

 

 

 

 

 

 

 

TXD

 

 

 

 

 

 

 

 

 

RXD

 

 

 

 

 

 

 

 

 

 

 

 

/DCD

 

 

Modem

 

 

 

 

 

Analog

 

DAA

Tip

/RI

 

 

 

 

 

 

 

Front

 

Ring

 

 

 

Controller

 

 

 

 

 

 

 

Auxiliary

I/O

 

 

 

 

 

 

End

 

 

 

 

 

 

NVRAM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RESET

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AR

 

 

 

 

 

 

 

 

 

 

 

 

/LCS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OH

 

 

 

 

 

 

 

 

 

 

 

 

AMP

 

 

 

 

 

 

 

 

 

 

 

 

XECOM

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XE3301

XE3301 Mechanical Specifications

 

INCHES

METRIC(MM)

 

 

 

 

 

PIN

MIN

MAX

MIN

MAX

A

2.74

2.760

69.60

70.10

B

1.370

1.390

34.80

35.31

C

0.400

0.420

10.16

10.67

D

0.890

0.910

22.61

23.11

E

1.890

1.910

48.01

48.51

F

0.125

0.200

3.18

5.08

G

0.080

0.100

2.03

2.54

H

0.415

0.435

10.54

11.05

J

0.090

0.110

2.29

2.79

K

0.020

0.025

0.51

0.64

L

0.380

0.400

9.65

10.16

M

0.090

0.110

2.29

2.79

 

 

 

 

 

Pins = 0.025 inch square pin

All pins tin-plated

XE3301 PIN CONFIGURATION

RESET

 

 

1

 

40

VCC

 

 

 

N/C

 

 

2

 

39

/DSR

 

 

 

 

 

 

RXD

 

 

3

 

38

/DCD

 

 

 

 

 

 

/DTR

 

 

9

 

 

 

 

 

 

 

 

/LCS

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

/CTS

 

11

 

 

 

 

 

 

 

 

 

 

 

OH

 

12

 

 

 

 

 

 

 

 

 

 

 

TXD

 

13

 

 

 

 

 

 

 

 

 

 

 

/RTS

 

 

14

 

 

 

 

 

 

 

 

 

 

 

 

 

NC

 

15

 

 

 

 

 

 

 

/RI

 

16

 

 

 

 

 

 

 

 

 

 

 

TIP

 

18

 

22

AMP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RING

 

20

 

21

GND

 

 

 

 

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XE3301

XE3301 Pin Descriptions

PIN NAME

DESCRIPTION

1

RESET

Hardware reset pin, Input, active High, TTL. A high on Pin 1 initiates a hardware

 

 

reset. An external reset is not required or recommended. The Reset pulse must be

 

 

a minimum of 100 milliseconds long.

2

N/C

 

3

RXD

Received Data, Output, TTL. Serial data output to the host. A logic "High" on RXD

 

 

represents a "mark" and a logic "Low" represents a "space".

9

\DTR

Data Terminal Ready, Input, active Low, TTL. The "AT&D" command sets the

 

 

function of DTR. The default, AT&D2, requires the host to assert DTR to permit a

 

 

modem link. The modem drops the call in progress if DTR is revoked and will not

 

 

connect until DTR is re-asserted.

10

\LCS

Loop Current Sense, active Low Input, TTL.

 

 

loop current is flowing through Tip and Ring.

 

 

XE3301B version.

A low on \LCS tells the modem that This feature is used only in the

11

\CTS

Clear to Send, Output, active Low, TTL/CMOS. CTS is used as a Flow Control

 

 

output from the modem. The modem revokes CTS with hardware flow control active

 

 

to signal the host that the modem's input buffer is full. The modem reasserts CTS

 

 

when the buffer can accept more data without a buffer overflow.

12

OH

Off-Hook, Output, active High. OH indicates the modem's hookswitch relay is

 

 

closed. Hookswitch closure connects the modem to the telephone line.

13

TXD

Transmit Data, Input, TTL. Serial data input from the host. A logic "High" represents

 

 

a "mark" and a Low represents a"space", TTL.

14

\RTS

Request to Send, input, active LOW, TTL. The XE3301 uses RTS for hardware flow

 

 

control. When RTS is revoked and hardware flow control is enabled, the modem will

 

 

not place data RXD.

15

NC

No Internal Connection

16

\RI

Ring Indicator, Output, active Low, TTL. When low indicates the modem is receiving

 

 

a ring signal.

18

TIP

Tip connection to the phone line(RJ11 pin3) from the internal DAA. The XE3301 is

 

 

not sensitive to the battery voltage polarity across Tip and Ring.

20

RING

Ring connection to the phone line(RJ11 pin4) from the internal DAA.

21

GND

Ground (0 volts)

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XE3301

XE3301 Pin Descriptions

PIN NAME

DESCRIPTION

22

AMP

Audio Output function is set by L & M commands and the value in register S22. This

 

 

output can drive a minimum load of 300 ohms.

38

\DCD

Data Carrier Detect, Output, active Low, TTL/CMOS. &C sets the DCD function. In

 

 

the default condition, AT&C1, DCD indicates the presence of a carrier signal on the

 

 

telephone line.

39

\DSR

Data Set Ready, Output, active Low, TTL/CMOS. &S sets the DSR function. In the

 

 

default condition, AT&S0, DSR is forced true.

40

Vcc

+5 Volts

 

 

 

ABSOLUTE MAXIMUM RATINGS*

SUPPLY VOLTAGE - Vcc

+6.5 Volts

DC INPUT VOLTAGE

-0.6 Volts to +6.5 Volts

STORAGE TEMPERATURE RANGE

-25° C TO +85° C

LEAD TEMPERATURE (Soldering, 2 sec per wave)

260° C

OPERATING TEMPERATURE RANGE

0 TO 70° C

*Exceeding these values may result in permanent damage to the device.

XE3301 ELECTRICAL SPECIFICATIONS

Parameter

Min

Typ

Max Units

Comments

 

VCC

4.75

 

5.25

Volts

 

 

 

ICC

170

200

220

mamps

On Line

 

 

50

 

mamps

Idle

Ring Voltage Detected

38

 

150

RMS

XE3301

 

10

 

 

RMS

XE3301B, XE3301I

 

 

20

 

 

RMS

XE3301G

Ring Frequency Detected

15.3

 

68

Hz

 

 

 

Telephone Loop Current

10

 

100

mamps

XE3301

 

10

 

120

mamps

XE3301B, XE3301I

 

10

 

60

mamps

XE3301G

 

10

 

45

mamps

XE3301F

Data Transmit level

-12

-10.5

-9.0

dBm

 

 

 

DTMF Transmit Level

 

-2.5

0

dBm

Avg over 3 second interval

Billing tone Filter

 

16

 

KHz

XE3301G Only

 

 

 

 

 

 

 

 

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XE3301

XE3301 Typical Applications Schematic

Note: RJ11 Pin assignments reflect a 6-pin connector. Tip and Ring are always the center pins of the RJ11 jack.

Recommended Parts

Reference Designation

Description

Recommended Part Number

L1,

L2

Ferrite Beads

TDK CB30-1812

C1,

C2

Capacitors

Sprague 30GAT47, 470 pfd, 3000 Volts

J1

RJ11 Jack

Stewart SS6446NF

 

 

 

 

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XE3301

XE3301 AT Commands

Modes of Operation

The XE3301 uses "AT" commands for control and configuration. The XE3301 operates in three modes; Command Mode, Fax Mode and Data Mode. Extensions to the AT command set support fax operation.

Data Mode: The modem enters data mode after it establishes a link and issues a "CONNECT" result code. In Data Mode the modem modulates all signals on Transmit Data, Pin 13, and sends them to the remote modem. The modem demodulates the signal from the remote modem and places it onto Received Data, Pin 3, for the host equipment. When the modem exits data mode, it issues a "NO CARRIER" result code.

Command Mode: The XE3301 enters command mode on application of power, reset, loss of the connection, or receipt of the escape sequence. In command mode the modem accepts commands from the host on Transmit Data. Appropriate result codes are returned on Received Data at the same speed and parity as the commands.

Fax Mode: The modem enters fax mode on receipt of the AT+FCLASS=1 command. Fax commands and responses are issued at 19,200 bits per second; the character format is 8 bits no parity. The modem accepts Class 1 Fax commands only in fax mode. The A/, ATO, AT&T and escape commands are not valid in fax mode.

Commands

The modem is configured and controlled with AT commands. AT commands follow a strict format. The command line is stored in the command buffer and executed upon receipt of a carriage return. Until executed, the command line can be edited with the backspace key.

Command Format - Each command, except A/, begins with the AT prefix. The "A" and "T" may be both upper case or both lower case but cannot be of different cases. The modem uses the prefix to identify the host's speed and parity. The modem determines speed by measuring the width of the incoming bits and parity by comparing the parity bits of the "A" and "T." The modem then returns result codes at the host's speed and parity.

Command Line - A command line may include multiple commands. The modem executes the commands in the sequence they appear in the command line. Spaces, inserted to improve legibility, do not fill space in the command buffer. A carriage return terminates the command line and causes the commands to be executed. Register S3 allows the user to select a character other than a carriage return to terminate the command line.

Command Buffer - The command buffer holds 40 characters, including the AT prefix. If it overflows, the modem issues an "ERROR" result code and commands are not executed.

Command Line Editing - A backspace can be used to edit the command any time before it is executed. The backspace character, Control and H simultaneously on some systems, erases the previous character in the command line. Any character except for the "A" and "T" can be erased. Register S5 allows the user to select a character other than a backspace to edit the command line.

Re-Execute Last Command - The A/ command causes the modem to re-execute the command line stored in the command buffer. This is the only command which does not require the "AT" prefix.

Omitted Parameters - Most commands include a parameter which determines the command function. When the parameter is omitted from the command string, it is assumed to be a 0.

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XE3301

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