XECOM XE9624FS, XE9624F Datasheet

A Complete Send and Receive Fax & Data Modem

XE9624F & XE9624FS

10-03-95

Description

Xecom's XE9624F and XE9624FS include a 2400bps data modem, a Group III Send and Receive fax modem and the telephone interface in one compact component. Both models include user transferable FCC Part 68 registration.

Xecom puts the XE9624F in our dual inline package. The XE9624F is pin compatible with other Xecom modems including the XE2401, XE2496, and XE9624E.

The XE9624FS comes in a Single Inline Package. The XE9624FS can be ordered for either vertical (XE9624FS1) or horizontal (XE9624FS2) mounting to optomize space utilization.

Xecom designed the XE9624F and XE9624FS specifically to provide computer, notebook, and industrial systems manufacturers with a complete, highly integrated, compact solution for adding data and fax communications.

Block Diagram

Features

• Data Rates: 2400, 1200 and 300 bps

• Send fax to 9600 bps

• Receive fax to 4800 bps

• Enhanced "AT" commands for modem control and configuration.

• Class 1 commands for facsimile control.

• Single +5V supply

• Low power CMOS: Operating: 200 mW (Typ.) Sleep mode: 50 mW (Typ.)

• Dimensions; XE9624F: 2.28" by 1.08" by 0.42"

• XE9624FS: 1.53" by 0.46" by 0.92"

xecom

2/XECOM XE9624F/XE9624FS

A 2.270 2.290 57.66 58.17 B 1.070 1.090 27.18 27.69 C 0.420 0.430 10.67 10.92 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 0.180 0.200 4.57 5.08 J 0.090 0.110 2.29 2.79 K 0.020 0.025 0.51 0.64

XE9624F Mechanical Specifications

Pins = 0.025 inch square pin All pins tin-plated

INCHES METRIC(MM)

PIN MIN MAX MIN MAX

XE9624FS Mechanical Specifications

Pins = 0.018 inch diameter pin All pins tin-plated

A 1.500 1.560 38.10 39.62 B 0.430 0.490 10.92 12.45 C 0.890 0.950 22.61 24.13 D 0.090 0.140 2.23 3.56 E 0.045 0.055 1.14 1.40 F 0.340 0.360 8.64 9.14 G 0.140 0.160 3.56 4.06 H 0.790 0.810 20.07 20.57 I 0.050 0.110 1.27 2.79 K 0.200 0.260 5.08 6.60 L 0.420 0.480 10.67 12.19

INCHES METRIC(MM)

PIN MIN MAX MIN MAX

XE9624FS1

XE9624FS2

XE9624F/XE9624FS XECOM\3

Pin Descriptions

NAME I/O DESCRIPTION

RESET I Hardware reset pin, Schmitt input, active HI, TTL. Use of an external

reset is not required

AR O Auxiliary Data/Voice Relay output, active HI, TTL/CMOS. When high,

AR drives an external auxiliary telephone set relay closed to allow the same telephone line to be used for voice communications.

RXD O Serial data output to the DTE (i.e. external UART). A logic "high"

represents a "mark" and a logic "low" represents a "space", TTL.

\DTR I Data Terminal Ready, input, active LO, TTL. The function of this pin is

set by the &D command and the value in register S21. Normally the modem ignores DTR.

\AA O Auto Answer enable indicator, output, active LO, TTL/CMOS. A low

indicates the modem is set to automatically answer an incoming call.

\CTS O Clear to Send, output, active LO, TTL/CMOS.

OH O DAA hookswitch relay is closed in the "off-hook" position connecting the

DAA to the telephone line.

TXD I Serial data input from the DTE (i.e. external UART). A logic "high"

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

\RTS I Request to Send, input, active LO, TTL. Not used.

\HS O High Speed indicator, output, active LO, TTL/CMOS. Low when

operating at 2400bps rate, high otherwise.

\RI O Ring Indicator, output, active LO, TTL. When low indicates the modem

is receiving a ring signal.

TIP — Tip connection to the phone line(RJ11 pin3) from the internal DAA.

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

Caution: Observe design rules for Tip & Ring trace layout

4/XECOM XE9624F/XE9624FS

NAME I/O DESCRIPTION

GND — Ground (0 volts). AMP O Audio output to speaker. Function is determined by L & M commands

and the value in register S22. This output can drive a 50Kohm load.

\DCD O Data Carrier Detect, output, active LO, TTL/CMOS. Function is set by

the &C command and the value in register S21.

\DSR O Data Set Ready, output, active LO, TTL/CMOS. Function is set by the

&S command and the value in register S21.

Vcc — +5 Volts

XE9624F

Pin Configuration

1 40 2 39 3 38 4 37 5 36 6 35 7 34 8 33 9 32 10 31 11 30 12 29 13 28 14 27 15 26 16 25 17 24 18 23 19 22 20 21

RESET

RXD

/DTR

/AA

/CTS

TXD

/RTS

/HS

/RI

TIP

RING

+5V /DSR /DCD

AMP GND

XE9624FS

Pin Configuration

VCC

Reset

TXD

RXD

\AA \RTS \DTR

\RI

\HS

\DCD

\CTS

\DSR

AMP

Gnd

Tip

Ring

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Pin Configurations

XE9624F/XE9624FS XECOM\5

AT Commands

The XE9624F and XE9624FS use the Hayes "AT" commands for configuration and control. Extensions to the AT commands support fax operation. The following section describes how to use the AT command format and lists the AT commands, Registers and Result codes used to control modem operation.

Modes of Operation

The "AT" commands have three operational modes; Command, Fax and Data Modes.

Data Mode: The XE9624F/FS enters data mode after it makes a connection with a remote modem and issues an appropriate "CONNECT" result code. In the Data Mode the modem sends all data on the Transmit Data line to the remote modem and puts data from the remote modem onto the Received Data line for the host equipment. When the modem exits data mode, it issues a "NO CARRIER" result code.

Command Mode: The XE9624F/FS enters command mode on power-up, reset, a lost connection, or receipt of an escape code. When in command mode, the modem accepts command line instructions from the host on transmit data. More than one instruction may be placed on each command line. Appropriate result codes are returned to the host on received data. The AT commands allow the host to configure the modem for a specific application.

Fax Mode: The XE9624F/FS enters fax mode after it receives the AT+FCLASS=1 command. In fax mode 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 while in the fax mode. The A/, ATO, AT&T and escape commands are not valid in fax mode.

Command Line Format

Command lines issued to the modem follow a strict format. Each command begins with the prefix AT. The command line is stored in the command buffer and executed upon receipt of a carriage return. Untilexecuted, the command line can be editied with the backspace key.

Command Prefix - Each command, except for the A/ command, begins with the AT prefix. The "A" and "T" may be either both caps or both lower case but cannot be of different cases. The prefix identifies the speed and parity of the commands sent to the modem by the host. Speed is determined by measuring the width of the incoming bits. Parity is determined by comparing the parity bit of the "A" and the "T." Result codes are sent at the speed and parity determined by the prefix.

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