CXD9450-14 View Datasheet(PDF) - Conexant Systems

Part Name

Description

Manufacturer

CXD9450-14

Single-Chip FaxEngine (CXD9450) and Integrated Analog Device (CX20415)

Conexant Systems 

Single-Chip FaxEngine and Integrated Analog Device

Single-Chip FaxEngine Product Family

Stand-by and Sleep Modes

CXD9450 Pin Assignments and Signal Definitions

Two power saving modes are provided to reduce the

power consumption. In Stand-by mode, the CPU is

functional but the modem clock is turned off to save

power. When this occurs, the modem may be activated

by software under different conditions. In Sleep mode,

the clock is cut off from both the modem and the CPU to

increase the power savings. The DRAM refresh is still

functional.

The system can be activated by paper insertion, key

pressing events, and telephone ring detection.

The CXD9450 176-pin TQFP signals are shown in

Figure 2 and listed in Table 1.

Power Requirements

Power requirements are listed in Table 2.

Absolute Maximum Ratings

Absolute maximum ratings are listed in Table 3.

Crystal Specifications

Embedded Modem DSP

The embedded modem DSP is a synchronous 9600 bps

(14400 bps optional) half-duplex modem with error

detection and DTMF generation/reception. It provides

data transmission/reception from regular PSTN lines,

PBX, or private lines.

The crystal specifications are listed in Table 4.

Package Dimensions

The 176-pin TQFP package dimensions are shown in

Figure 3.

The modem can operate at any standard V.29 data

speed up to 9600 bps as well as in V.21 and V.23

modes.

The modem is designed for use in Group 3 facsimile

machines, satisfies the requirements specified in ITU-T

recommendations V.29, V.27 ter, V.21 Channel 2, and

T.4, and meets the signaling requirements of T.30. It also

performs HDLC framing according to T.30 at all speeds.

Software and Firmware Support Features

Available software and embedded firmware provides the

following:

• Modem support for speeds up to 9600 bps (V.17

optional)

• ECM under conditional assembly

• DRAM memory support under conditional assembly

• MH, MR and MMR support

• Page memory receiving

• 5 ms minimum scan line time

• Conditional Error Diffusion or Dither table (8x8)

support

• Dark Level Correction support

• Single motor support

• 32-key operator panel support

• Call progress support for Europe and US

• Monochrome inkjet print engine support

100544C

Conexant

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