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NS32FV100 Datasheet(PDF) 7 Page - Texas Instruments |
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NS32FV100 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 96 page  10 Fax-System Configuration A typical FAX system based on the NS32FX100 NS32FX200 or NS32FV100 is shown in Figure 1-1 11 BLOCK DIAGRAM DESCRIPTION CPU The typical FAX system shown below is based on a single embedded processor The choice between the NS32FX161 NS32FV16 and the NS32FX164 depends on the specific application requirements System Chip The FAX-system chip interfaces between FAX-system peripheral devices such as motors printers and scanners and the embedded processor The chip con- tains FAX-system elements such as CODEC DMA Control- ler Interrupt Control Unit and counters Scanner Either a Charge-Coupled Device (CCD) scanner or a Contact Image Sensor (CIS) scanner may be used The NS32FX100 incorporates most of the video circuits such as shading compensation dithering and digitizing which are required for the scanner interface Printer A Thermal Print Head (TPH) can be connected di- rectly to the NS32FX100 Other types of printer engine such as laser or ink-jet can easily be interfaced to the NS32FX100 via an additional small ASIC Motors The NS32FX100 controls two stepper motors The only external components required to operate the motors are buffersdrivers DAA IF The telephone line is accessed via a Data Access Arrangement (DAA) The NS32FX100 contains the digital part of a Sigma-Delta CODEC which connects to the DAA A few external components are required to implement the analog part of the CODEC Memory The NS32FX100 directly controls ROM and SRAM Both the NS32FX200 and the NS32FV100 directly control DRAM in addition to ROM and SRAM Memory access time is also controlled by the NS32FX100 thus allowing the designer to tune memory price and system performance MICROWIRE The serial channel with programmable inter- face parameters can be used by advanced FAX systems to interface with other devices (such as EEPROMs) UART This serial channel with programmable interface pa- rameters can be used by advanced fax systems to commu- nicate with other devices (eg host machines) IO Pins General purpose IO pins are used both to moni- tor (eg ring detector read) and control (eg scanner light control) the FAX-system peripheral devices DMA Channels NS32FX100 and NS32FV100 The NS32FX100 and NS32FV100 have three DMA channels which are used to interface the scanner and the printer All three channels may be allocated for external usage (eg Centronics paral- lel interface Ethernet) NS32FX200 The NS32FX200 has four DMA channels Three channels are used by the NS32FX200 to interface to the scanner and the printer and one channel is for external usage All four channels may be allocated for external us- age (eg Centronics parallel interface Ethernet) 6 |
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Similar Description - NS32FV100 |
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