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PC8477BV-1 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC8477BV-1
Description  Advanced Floppy Disk Controller
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC8477BV-1 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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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


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