參數(shù)資料
型號(hào)： PC87334VJG
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 外設(shè)及接口
英文描述： SuperI/O 3.3V/5V Floppy Disk Controller, Dual UARTs, Infrared, IEEE1284 Parallel Port, and IDE Interface
中文描述： MULTIFUNCTION PERIPHERAL, PQFP100
封裝： PLASTIC, TQFP-100
文件頁數(shù)： 1/102頁
文件大?。?/td> 966K
代理商： PC87334VJG
TL/C/12039
P
D
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
é
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
é
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
m
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 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
100% compatible with ISA, EISA, and MicroChannel
architectures
Y
The Floppy Disk Controller:
D Software compatible with the DP8473, the 765A and
the N82077
D 16-byte FIFO (disabled by default)
D Burst and Non-Burst modes
D Perpendicular Recording drive support
D New high-performance internal digital data separator
(no external filter components required)
D Low-power CMOS with enhanced power-down mode
D Automatic media-sense support, with full IBM TDR
(Tape Drive Register) implementation
D Supports fast 2 Mbps and standard 1 Mbps/
500 kbps/250 kbps tape drives
Y
The Bidirectional Parallel Port:
D Enhanced Parallel Port (EPP) compatible
D Extended Capabilities Port (ECP) compatible, includ-
ing level 2 support
D Bidirectional under either software or hardware
control
D Compatible with ISA, EISA, and MicroChannel
architectures
D Ability to multiplex FDC signals on parallel port pins
allows use of an external Floppy Disk Drive (FDD)
D 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/12039–1
TRI-STATE
é
is a registered trademark of National Semiconductor Corporation.
SuperI/O
TM
is a trademark of National Semiconductor Corporation.
IBM
é
, MicroChannel
é
, PC-AT
é
and PS/2
é
are registered trademarks of International Business Machines Corporation.
C
1995 National Semiconductor Corporation
RRD-B30M65/Printed in U. S. A.
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