- March 1998
PC87309 SuperI/O Plug and Play Compatible Chip
in Compact 100-Pin VLJ Packaging
Highlights
General Description
For flexible UART and IR support, the PC87309 offers two
operation modes:
The PC87309 is a single-chip solution to the most commonly used ISA, EISA and MicroChannel® peripherals in a compact, 100-pin VLJ packaging. This fully Plug and Play (PnP)
and PC97 compatible chip conforms to the Plug and Play
ISA Specification Version 1.0a, May 5, 1994, and meets
specifications defined in the PC97 Hardware Design Guide.
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The PC87309 incorporates: a Floppy Disk Controller (FDC),
a Mouse and Keyboard Controller (KBC), two enhanced
UARTs, one of which is with Infrared (IR) support, a full
IEEE 1284 parallel port and support for Power Management
(PM). The chip also provides a separate configuration register set for each module.
Mode 1: Full-IR Mode
UART1 works as UART; UART2 works as fully IRcompliant device
Mode 2: Two-UART Mode
Either both UARTs work as UARTs, or UART1 works
as UART and UART2 works as partially IR-compliant
device, providing only IRRX and IRTX support
Outstanding Features
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The Infrared (IR) interface complies with the HP-SIR and
SHARP-IR standards, and supports all four basic protocols
for Consumer Remote Control circuitry (RC-5, RC-6, NEC,
RCA and RECS 80).
Full SuperI/O functionality in compact, cost-effective
100-pin VLJ packaging
PC97 compliant
PC87309 Block Diagram
Floppy Drive
Interface
DMA
IRQ Channels
Plug and Play
(PnP)
Data
Floppy Disk
Controller (FDC)
(Logical Device 0)
Handshake
High Current Driver
IEEE 1284
Parallel Port
(Logical Device 1)
µP Address
Data and
Control
Serial Port
with IR (UART2)
(Logical Devices 2)
Serial
Serial Port
(UART1)
(Logical Devices 3)
Power Management
(PM) Logic
(Logical Device 4)
Serial
Interface
Control
Infrared
Mouse and Keyboard
Controller (KBC)
(Logical Devices 5 & 6)
Data and
Control
Ports
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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
www.national.com
Highlights
PRELIMINARY
April 1998
