[Conexant]

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

The Conexant? Single-Chip FaxEngine product family consists of the Single-Chip FaxEngine (CXD9450) that contains an embedded modem Digital Signal Processor (DSP), and a separate Integrated Analog (IA) device (20415).

This device set, along with the supporting firmware and evaluation system, comprises a complete facsimile machine—needing only power supply, scanner, and printer mechanism components to complete the machine. A system-level block diagram is shown in Figure 1.

Features

Microprocessor and Bus Interface

? MC24 Central Processing Unit

? Up to 10 MHz CPU clock speed

? Memory efficient input/output bit manipulation

? 24-bit internal address bus, 8-bit data bus

? External Bus

? Address, data, control, status, and decoded chip select signals support connection to external ROM, SRAM, DRAM and operator panel

? 24-bit external address bus

? 8-bit data bus

? Chip selects

? ROMCSn for ROM support

? CS0n for SRAM

? CS1n-CS5n for external I/O

? FCSn for FLASH memory support

? LCDCS for LCD support

? DRAM Controller

? DRAM is refreshed in Sleep and Stand-by modes

? Up to 8 MB supported in two blocks

? Organizations supported: 4 or 8-bit

? Single and page mode access support

? Flash memory support

? NAND and NOR-type support

? Serial NAND support

? NOR-type memory up to 2 MB

? DMA Controller

? Six dedicated internal DMA channels for scanner, thermal printer, and T.4/T.6 access of internal and/or external memory.

? DMA Channel 2 can be reprogrammed for external access to plain paper inkjet printing