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National Semiconductor Electronic Components Datasheet

PC97338 Datasheet

ACPI 1.0 and PC98/99 Compliant SuperI/O

No Preview Available !

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
SCC1
(16550 UART)
SCC2
(16550 UART +
INFRARED)
Micro-
processor
Address
Data and
Control
Interrupt
and DMA
Plug and Play
Support
Power-
Down
Logic
IEEE1284
Parallel Port
High Current Driver
Floppy
Drive
Interface
Floppy Disk
Controller (FDC)
with
Digital Data
Separator (DDS)
(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
www.national.com


National Semiconductor Electronic Components Datasheet

PC97338 Datasheet

ACPI 1.0 and PC98/99 Compliant SuperI/O

No Preview Available !

s A new, high performance, on-chip Floppy Disk
Controller (FDC) provides:
Software compatibility with the PC8477, which
contains a superset of the floppy disk controller
functions in the µDP8473, the NEC µPD765A
and the N82077
A modifiable 13-bit address
Ten IRQ channel options
Four 8-bit DMA channel options
16-byte FIFO
Burst and non-burst modes
Low-power CMOS with enhanced power-down
mode
A new, high-performance, on-chip, digital data
separator without external filter components
Support for 5.25"/3.5" floppy disk drives
Automatic media sense support
Perpendicular recording drive support
Three mode Floppy Disk Drive (FDD) support
Full support for IBM’s Tape Drive Register
(TDR) implementation
Support for new fast tape drives (2 Mbps) and
standard tape drives (1 Mbps, 500 Kbps and
250 Kbps)
Support for both FM and MFM modes.
s Two Serial Communication Controllers provide:
Software compatibility with the 16550A and the
16450
A modifiable 13-bit address
Ten IRQ channel options
MIDI baud rate support
Four 8-bit DMA channel options on SCC2
Shadow register support UART write-only bits
s A fast universal Infrared interface on SCC2 sup-
ports the following:
Data rates of up to 115.2 Kbps (SIR)
A data rate of 1.152 Mbps (MIR)
A data rate of 4.0 Mbps (FIR)
Selectable internal or external modulation/de-
modulation (Sharp-IR)
Consumer Electronic IR mode
s A bidirectional parallel port that includes:
A modifiable 13-bit address
Ten IRQ channel options
Four 8-bit DMA channel options
An Enhanced Parallel Port (EPP) compatible
with version EPP 1.9 (IEEE1284 compliant),
that also supports version EPP 1.7 of the Xir-
com specification.
An Extended Capabilities Port (ECP) that is
IEEE1284 compliant, including level 2
Bidirectional data transfer under either soft-
ware or hardware control
Compatibility with ISA, EISA, and MicroChan-
nel parallel ports
Multiplexing of additional external FDC signals
on parallel port pins that enables use of an ex-
ternal Floppy Disk Drive (FDD)
A protection circuit that prevents damage to the
parallel port when an external printer powers
up or operates at high voltages
14 mA output drivers
s Two general purpose pins for two programmable
chip select signals can be programmed for game
port control.
s An address decoder that:
Selects all primary and secondary ISA ad-
dresses, including COM1-4 and LPT1-3
Decodes up to 16 address bits
s Clock source:
An internal clock multiplier generates all re-
quired internal frequencies.
A clock input source 14.318 MHz, 24 MHz, or
48 MHz may be selected
s Enhanced power management features:
Special power-down configuration registers
Enhanced programmable FDC command to
trigger power down
Programmable power-down and wake-up
modes
Two dedicated pins for FDC power manage-
ment
Low power-down current consumption (typical-
ly for PC97338, 400 µA for 3.3V and 600 µA for
5V application)
Reduced pin leakage current
Low power CMOS technology
The ability to shut off clocks to either the entire
chip or only to specific modules
s Mixed voltage support provides:
Standard 5 V operation
Low voltage 3.3 V operation
Simultaneous internal 3.3 V operation and re-
ception or transmission to devices that have ei-
ther 3.3 V or 5 V power supply
s 100-pin TQFP VJG package - PC87338/PC97338
s 100-pin PQFP VLJ package - PC87338/PC97338
2 www.national.com


Part Number PC97338
Description ACPI 1.0 and PC98/99 Compliant SuperI/O
Maker National Semiconductor
Total Page 30 Pages
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