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PC8477BVF-1 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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PC8477BVF-1 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 54 page  TLF11332 August 1993 PC8477B (SuperFDC TM ) Advanced Floppy Disk Controller General Description The PC8477B CMOS advanced floppy disk controller is an enhanced version of National’s DP8473 floppy controller The PC8477B is software compatible with the DP8473 and NEC mPD765 floppy disk controllers In addition it is pin and software compatible with the Intel 82077AA floppy control- ler The PC8477B a 24 MHz crystal a device chip select and a resistor package are all that is needed for a complete PC-AT PS2 or EISA floppy controller solution The PC8477B includes advanced features such as a 16 byte FIFO (Burst and Non-Burst modes) support of Per- pendicular Recording Mode disk drives PS2 diagnostic registers for Model 30 and Models 506080 standard CMOS disk IO and additional commands to control these new features The 16 byte FIFO will increase system per- formance at higher data rates and with multi-tasking bus structures This controller is designed to fit into all PC-AT EISA and PS2 designs as well as other advanced applica- tions Features Y Pin and software compatible with Intel 82077AA FDC Y Software compatible with NSC’s DP8473 Y 16 byte FIFO (default disabled) Burst and Non-Burst modes Programmable threshold Y Perpendicular Mode Recording drive support Y High performance internal analog data separator (no external filter components required) Y Low power CMOS with manual power down mode Y Automatic power down mode for complete software transparency Y Integrates all PC-AT and PS2 logic On chip Oscillator PC compatible FDC address decode PS2 Model 30 and Model 506080 diagnostic registers DMA control circuitry High current CMOS disk interface outputs Data Rate and Digital Output registers 12 mA mP bus interface buffers Y Data Rate Support 250300 kbs 500 kbs and 1 Mbs Y Write precompensation software programmable Y 68 pin PLCC package Y 60 pin PQFP package Ideal for space limited applications Functional Block Diagram TLF11332 – 3 FIGURE 1-1 SuperFDCTM is a trademark of National Semiconductor Corporation TRI-STATE is a registered trademark of National Semiconductor Corporation IBM PC-AT and PS2 are registered trademarks of International Business Machines Corp C1995 National Semiconductor Corporation RRD-B30M75Printed in U S A |
Similar Part No. - PC8477BVF-1 |
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Similar Description - PC8477BVF-1 |
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