PC87332VLJ-5 NSC [National Semiconductor], PC87332VLJ-5 Datasheet
PC87332VLJ-5
Manufacturer Part Number
PC87332VLJ-5
Description
PC87332VLJ (3.3V/5V) and PC87332VLJ-5 (5V) (SuperI/OTM III Premium Green) Floppy Disk Controller, Dual UARTs, IEEE1284 Parallel Port, and IDE Interfac
Manufacturer
NSC [National Semiconductor]
Datasheet
1.PC87332VLJ-5.pdf
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C 1995 National Semiconductor Corporation
PC87332VLJ (3 3V 5V) and PC87332VLJ-5 (5V)
(SuperI O
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 I O peripherals in ISA EISA
and MicroChannel
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 SuperI O family Advanced power manage-
ment features and mixed voltage operation in the VLJ ver-
sion make the PC87332 chips an ideal for low-power and or
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 PD765 and N82077 flop-
py disk controller functions All popular 5 25 and 3 5 flop-
py drives including the 2 88 MB 3 5 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
Block Diagram
TRI-STATE is a registered trademark of National Semiconductor Corporation
SuperI O
IBM
MicroChannel
TM
is a trademark of National Semiconductor Corporation
PC-AT and PS 2 are registered trademarks of International Business Machines Corporation
TM
based computers It incorporates a
III Premium Green)
TL C 11930
(Continued)
Features
Y
Y
Floppy Disk Controller
Bidirectional Parallel Port
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 kbps 250 kbps tape drives
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
PRELIMINARY
RRD-B30M65 Printed in U S A
May 1995
(Continued)
TL C 11930 – 1
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