PC87338/PC97338 ACPI 1.0 and PC98/99 Compliant SuperI/O
November 1998
PC87338/PC97338
ACPI 1.0 and PC98/99 Compliant SuperI/O
General Description
The PC97338 is a fully ACPI 1.0 and PC98/99 com-
pliant, ISA based Super I/O. It is functionally compat-
ible with the PC87338. It includes a Floppy Disk
Controller (FDC), two Serial Communication Control-
lers (SCC) for UART and Infrared support, one
IEEE1284 compatible Parallel Port, and two general
purpose Chip Select signals for game port support.
The device supports power management as well as
3.3V and 5V mixed operation making it particularly
suitable for notebook and sub-notebook applications.
The PC87338 and PC97338 are fully compliant to the
Plug and Play specifications included in the "Hard-
ware Design Guide for Microsoft Windows 95".
Differences between the PC87338 and PC97338 are
indicated in italics. These differences are summarized
in Appendix A.
Features
s
Meets ACPI 1.0 and PC98/99 requirements
s
Backward compatible with PC87338
s
100% compatibility with Plug and Play require-
ments specified in the “Hardware
Design Guide for
Microsoft Windows 95”,
ISA, EISA, and Micro-
Channel architectures
s
A special Plug and Play module includes:
—
Flexible IRQs, DMAs and base addresses
—
General Interrupt Requests (IRQs) that can be
multiplexed to the ten supported IRQs
Block Diagram
CS1,0
Configuration Input
Signals
Serial Interface
Serial Fast IR
Interface Interface
General
Chip Select
Configuration
Registers
Interrupt
and DMA
SCC1
(16550 UART)
SCC2
(16550 UART +
INFRARED)
Micro-
processor
Address
Data and
Control
Plug and Play
Support
Power-
Down
Logic
IEEE1284
Parallel Port
High Current Driver
Floppy Disk
Controller (FDC)
with
Digital Data
Separator (DDS)
Floppy
Drive
Interface
(Enhanced 8477)
Floppy
Drive
Interface
DMA IRQ IRQ Input
Channels
Signals
Control
Data
Handshake
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
IBM
®
, MicroChannel
®
, PC-AT
®
and PS/2
®
are registered trademarks of International Business Machines Corporation.
Microsoft
®
and Windows
®
are registered trademarks of Microsoft Corporation.
©
1998 National Semiconductor Corporation
1
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NSC [ NATIONAL SEMICONDUCTOR ]
