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.
Applications
Point of Sale (POS) terminals
Set Top Boxes (STB)
Security Systems
Remote Site Management
Meters
Videophone Terminals
Key Features
SPI Interface
Benefits
Uses I/O shared with other SPI peripherals - alleviates
need for host to support traditional serial interface
OS independent and minimal host intervention
Controller-based modem, no external memory
required
Up to V.92
Robust and field proven CID support
Part Number CX93040-1x CSPMxx
Robust dial-up connectivity
Meets performance criteria needed for Set-Top Box
applications
Compatibility with established POS server base.
Allows worldwide support with a single design
Allows additional country profile storage and code
upgrades
Quick time to market and low system cost
Description
V.92/V.34/V.32bis Controllered SPI
Modem with CX20548 SmartDAA® for
Embedded Applications
Support for POS specific fast connect protocols
SmartDAA support
Optional serial NVRAM interface
Reference design supporting 6KV
CONEXANT [ CONEXANT SYSTEMS, INC ]
