Preliminary Information

This document contains information on a new product. The parametric information,

although not fully characterized, is the result of testing initial devices.

CX93040-1x CSPMxx

V.92/V.34/V.32bis Controllered SPI Modem with CX20548

SmartDAA® for Embedded Applications

The CX93040 modem, paired with the CX20548 SmartDAA® 4 Line Side Device

(LSD), is well suited to embedded applications such as Point of Sale (POS)

terminals, Set-Top Boxes (STB), Video Recorders, Meters, Security Systems,

Remote Site Management, and other applications that require robust dial-up

connectivity. Integrating a microcontroller, digital signal processor, memory, and

a SmartDAA® interface onto a single die, the CX93040 is easily adaptable for

just about any application, completely independent of the host processor and

operating system. In addition, the SmartDAA interface hooks directly to

Conexant's field-proven, market-leading fourth-generation silicon DAA,

supporting the lowest component line-side design and permitting a single-cost,

optimized SKU capable of meeting and exceeding global PTT standards.

Setting the CX93040 apart is the addition of an SPI interface, which allows for

maximum flexibility in the main processor. Found in virtually every SoC and/or

main processor, SPI is a shared bus working in a master/slave configuration,

and requiring only one set of I/Os for all peripherals that attach to the SPI bus.

This is in stark contrast to a UART port for an RS232 serial bus, which requires a set

of dedicated I/Os for each peripheral. Using an SPI bus allows the CX93040 to

eliminate a UART port on the SoC and its associated pins that would have otherwise

been dedicated for the modem.

The CX93040 is offered in three versions, 1) V.32bis, 2) V.34 and 3) V.92.

Furthermore, CX93040 leverages three generations of firmware expertise and know-

how that, coupled with Conexant’s market-leading and field-proven DAA and full

reference design kits, makes this modem the easiest, most mature and robust

modem in which to design.

The CX93040 Controllered SPI modem device set is available in the smallest

footprint and environmentally friendly, RoHS/green-compliant packages consisting of

a CX93040 SPI interface modem device in a 6x6mm 20-pin Quad Flat-No Lead

(QFN) package and CX20548 SmartDAA 4 LSD in a 4mmx4mm 16-pin QFN

package.

Key Features

Benefits

SPI Interface

Uses I/O shared with other SPI peripherals - alleviates

need for host to support traditional serial interface

Controller-based modem, no external memory

required

OS independent and minimal host intervention

Up to V.92

Robust dial-up connectivity

Robust and field proven CID support

Meets performance criteria needed for Set-Top Box

applications

Support for POS specific fast connect protocols

Compatibility with established POS server base.

SmartDAA support

Allows worldwide support with a single design

Optional serial NVRAM interface

Allows additional country profile storage and code

upgrades

Reference design supporting 6KV

Quick time to market and low system cost

Applications

Point of Sale (POS) terminals

Set Top Boxes (STB)

Security Systems

Remote Site Management

Meters

Videophone Terminals

Part Number CX93040-1x CSPMxx

Description

V.92/V.34/V.32bis Controllered SPI

Modem with CX20548 SmartDAA® for

Embedded Applications