Conexant CX9543x传真通信方案

Conexant 公司的CX9543x是单片FaxEngine系列产品,包括了语音通信,目标应用在具有喷墨,激光和热敏打印功能的传真机.片上系统(SoC) CX9543x有嵌入式软调制解调器功能,它采用片内交叉点开关(CPS),扫描模拟前端(AFE),ADC以及可选择的用来和电话线连接的CX20548 SmartDAA.器件包括了开发完整传真机所需的主要的硬件和软件.本文介绍了CX9543x的主要特性和详细的方框图.

Single-Chip FaxEngine Controller (SCE600) CX9543x
The CX9543x Single-Chip FaxEngine family of devices are the most highly integrated fax semiconductor solutions available today. The system-on-chips (SoCs) contain advanced voice communications and are targeted at fax machines with inkjet, laser and thermal printing capabilities. The CX9543x features an embedded softmodem function using integrated on-chip crosspoint-switch (CPS), scanner analog front end (AFE), ADC, and an optional external CX20548 SmartDAA® for interfacing to the telephone line for worldwide (WW) homologation. The devices include all the core hardware and software required to develop a complete fax machine.
The imaging solutions are powered by an integrated 180MHZ 32-RISC processor, a 120MHz digital signal processor (DSP), and three 288 MHz flexible I/O processors to perform various control/monitoring and compression/ decompression functions, as well as scan and print image processing for facsimile applications. The CX9543x SoCs interface to fax machine components such as a scanner, printer, memory card, LCD, motors, and
operator control panel through an I/O pin multiplexer. The SoCs also include direct printer control and USB interfaces.
The CX9543x devices use Conexant’s field-proven V.17 SoftFax technology to enable the transmission of documents. The embedded softmodem function also supports V.29 facsimile transmission and reception, in addition to all basic HDLC functions and T.30 requirements either using the integrated CPS or an external SmartDAA. The CX9543x SoCs feature dual voice ADCs and DACs. Optional features such as voice compression/decompression for digital telephone answering machine (DTAM) and full-duplex speakerphone are also available. The CX9543x SoCs have been designed with many cost-effective features.

The devices are based on Conexant’s Configurable System Solution (CSS) architecture, which allows manufacturers to use a single device for multiple platforms and geographies, and reduce development costs. Conexant’s SmartDAA® technology, available as an option, eliminates the need for costly components required for discrete data access arrangement (DAA) implementations, which significantly reduce bill of material (BOM) costs.

Different feature combinations are available within the SoC family. The options include SmartDAA, USB, V.29, V.17, V.34, DTAM, Speakerphone and Russian CID.

有特色的主要特性:

Distinguishing Features
Integrated voice components
Integrated speaker amplifier
Integrated two-channel fax/voice ADC and DAC
Integrated analog cross point switch
32-bit RISC CPU up to 180MHz
120MHz VLIW DSP for image processing
Three flexible I/O processors up to 288MHz
Integrated fax modem, DTAM and speakerphone
Integrated scanner AFE/ADC and monitor ADC
Uses fourth generation silicon DAA:
CX20548 SmartDAA (optional)
Lower BOM cost, worldwide support with single SKU
USB 2.0 full speed device/host port (optional)

主要特性:
Integrated CPS AFE
Speaker amplifier
Handset speaker driver
Line-out/RF-out/doorphone-out drivers
Microphone and handset microphone inputs with PGA
Line-in/RF-in/doorphone-in with PGA
Cross point switch with total four inputs, four outputs, two ADC and two DAC channels
Power down mode
32-bit RISC CPU – up to 180MHz
Embedded image processing VLIW DSP – up to 120MHz
Bad pixel correction
Dark level and shading correction
Linearization
Resolution conversion
Sharpening
Error diffusion
Background removal
JBIG compression/decompression
Three flexible I/O processors up to 288MHz – support a variety of system configurations
Scanner control
Direct thermal, thermal transfer, inkjet and laser print engine direct control
Stepper and DC motor control
Memory card interface
Graphic LCD control
SDRAM 16-bit, 16/64/128/256Mbits – up to 120MHz
Integrated scanner AFE/ADC and monitor ADC
1.5MHz 11-bit Scanner ADC
16-bit monitor ADC with a four-channel inputs
Integrated fax modem (SoftFax)
Sleep mode to reduce power consumption
Real time clock with battery backup
High-speed UART with hardware flow control and IrDA support
High-speed SPI interface for serial flash memory
Optional USB 2.0 full speed device/host port
Optional fourth generation silicon DAA: CX20548 SmartDAA
Lower BOM cost, worldwide support with single SKU
Optional voice compression/decompression for digital telephone answering machine (DTAM) application
Optional full-duplex speakerphone function
3.3V single power supply or 3.3V/1.25V dual supply operation
Compact lead-free (Pb-free) package
CX9543X FaxEngine Controller: 176-pin epTQFP
Optional CX20548 SmartDAA: 16-pin QFN



图1.CX95430的方框图.