r6781-12 Conexant Systems, Inc., r6781-12 Datasheet - Page 9

• Manufacturer Part Number: r6781-12
• Description: Embedded Modem Family
• Manufacturer: Conexant Systems, Inc.

1.2.1 General
D224ATLVDSC
1.0 Functional Description
1.1 Overview
The Conexant RC224ATLV is a combination V .22 bis data and Group 3 fax
CMOS modem in a single VLSI package and is identical to the RC224ATLV . The
RC224ATLV integrated data/fax modem is available in either a 68-pin plastic
leaded chip carrier (PLCC) or a 100-pin plastic quad flat pack (PQFP).
MNP 5) capabilities can be supported in the RC224ATLV using the host
communication software.
terminal equipment (DTE). When parallel mode is selected, a 16C450-compatible
interface allows direct connection to a notebook, laptop, or PC-compatible bus
without an external universal asynchronous receive/transmit (UART). When
serial mode is selected, a CCITT V .24 logic-compatible interface with transistor to
transistor logic (TTL) levels is supplied along with indicator outputs.
1.2 Technical Specifications
The RC224ATLV modem is a full-featured, self-contained data/fax solution. No
external microcontroller for data or fax control functions is required. Dialing, call
progress, and telephone line interface functions are fully supported and controlled
through the AT command set.
and pattern detection required by the applicable CCITT or Bell standard are
supported.
300 bps), performed by the modem, are controlled and monitored through the fax
EIA-578 Class 1 command interface. Full HDLC formatting, flag
insertion/deletion, and CRC generation/checking is provided.
transfer to and from the DTE is flow controlled by X-on/X-off.
Full error correction (V .42 LAPM, MNP2-4) and data compression (V .42 bis,
The modem has a selectable parallel or serial interface to the host data
Data modes perform complete handshake and data rate negotiations. All tone
Fax modes support Group 3 fax requirements. Fax data and fax control (V .21
Both transmit and receive fax data is buffered within the modem. Fax data
Conexant
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