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PC87334VJG Datasheet

  • PC87334VJG

  • SuperI/O 3.3V/5V Floppy Disk Controller, Dual UARTs, Infrare...

  • 966.68KB

  • 102頁

  • NSC

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PC87334VLJ PC87334VJG SuperI O 3 3V 5V Floppy Disk Controller
Dual UARTs Infrared IEEE1284 Parallel Port and IDE Interface
PRELIMINARY
March 1995
PC87334VLJ PC87334VJG SuperI O
TM
3 3V 5V Floppy Disk Controller Dual UARTs Infrared
IEEE1284 Parallel Port and IDE Interface
General Description
The PC87334VLJ PC87334VJG is a single chip solution for
most commonly used I O peripherals in ISA EISA and Mi-
croChannel 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 decod-
ing 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 management fea-
tures mixed voltage operation and integrated Serial-Infra-
Red (SIR) support makes the PC87334 an ideal choice for
low-power and or portable personal computer applications
The PC87334 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 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 and one port also
supports IrDA and the HP SIR compliant signaling protocol
The parallel port is fully IEEE 1284 level 2 compatible The
SPP (Standard Parallel Port) is fully compatible with ISA
EISA and MicroChannel parallel ports In addition to the
SPP EPP (Enhanced Parallel Port) and ECP (Extended Ca-
pabilities Port) modes are supported by the parallel port
All IDE control signals with DMA support are provided by the
PC87334 Only external signal buffers are required to imple-
ment a complete IDE interface
(Continued)
Features
Y
Y
Y
100% compatible with ISA EISA and MicroChannel
architectures
The 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 with full IBM TDR
(Tape Drive Register) implementation
Supports fast 2 Mbps and standard 1 Mbps
500 kbps 250 kbps tape drives
The 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
Compatible with ISA EISA and MicroChannel
architectures
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
TL C 12039 鈥?1
TRI-STATE is a registered trademark of National Semiconductor Corporation
SuperI O
TM
is a trademark of National Semiconductor Corporation
IBM MicroChannel PC-AT and PS 2 are registered trademarks of International Business Machines Corporation
C
1995 National Semiconductor Corporation
TL C 12039
RRD-B30M65 Printed in U S A

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