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PC87332 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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PC87332 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 98 page  TLC11930 PRELIMINARY May 1995 PC87332VLJ (33V5V) and PC87332VLJ-5 (5V) (SuperIO TM III Premium Green) Floppy Disk Controller Dual UARTs IEEE1284 Parallel Port and IDE Interface General Description The PC87332VLJ and PC87332VLJ-5 are single chip solu- tions for most commonly used IO peripherals in ISA EISA and MicroChannel based computers It incorporates a Floppy Disk Controller (FDC) two full featured UARTs an IEEE 1284 compatible parallel port and all the necessary control logic for an IDE interface Standard PC-AT address decoding for all the peripherals and a set of configuration registers are also implemented in this highly integrated member of the SuperIO family Advanced power manage- ment features and mixed voltage operation in the VLJ ver- sion make the PC87332 chips an ideal for low-power andor portable personal computer applications The PC87332 FDC uses a high performance digital data separator eliminating the need for any external filter compo- nents It is fully compatible with the PC8477 and incorpo- rates a superset of DP8473 NEC mPD765 and N82077 flop- py disk controller functions All popular 525 and 35 flop- py drives including the 288 MB 35 floppy drive are sup- ported In addition automatic media sense and 2 Mbps tape drive support are provided by the FDC The two UARTs are fully NS16450 and NS16550 compati- ble Both ports support MIDI baud rates (Continued) Features Y Floppy Disk Controller Software compatible with the DP8473 the 765A and the N82077 16-byte FIFO (disabled by default) Burst and Non-Burst modes Perpendicular Recording drive support New high-performance internal digital data separator (no external filter components required) Low-power CMOS with enhanced power-down mode Automatic media-sense support Supports fast 2 Mbps and standard 1 Mbps 500 kbps250 kbps tape drives Y Bidirectional Parallel Port Enhanced Parallel Port (EPP) compatible Extended Capabilities Port (ECP) compatible includ- ing level 2 support Bidirectional under either software or hardware control Ability to multiplex FDC signals on parallel port pins allows use of an external Floppy Disk Drive (FDD) Includes protection circuit to prevent damage to the parallel port when a connected printer is powered up or is operated at a higher voltage (Continued) Block Diagram TLC11930 – 1 TRI-STATE is a registered trademark of National Semiconductor Corporation SuperIOTM is a trademark of National Semiconductor Corporation IBM MicroChannel PC-AT and PS2 are registered trademarks of International Business Machines Corporation C1995 National Semiconductor Corporation RRD-B30M65Printed in U S A |
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