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PC87351IBW/VLA-PC87351-IBW/VLA
PC98 and ACPI Compliant SuperI/O with System Wake-up Control
PC87351 PC98 and ACPI Compliant SuperI/O with System Wake-Up Control
PRELIMINARYMay 1998
PC87351 PC98 and ACPI Compliant SuperI/O with
System Wake-Up Control
Highlights
General DescriptionThe PC87351, a member of National Semiconductor’s Su-
perI/O family of integrated PC peripherals, is a 128-pin,
PC98 and ACPI compliant SuperI/O that offers a single-chip
solution to the most commonly used ISA peripherals.
The PC87351 incorporates: a Floppy Disk Controller (FDC)
which is available also on the Parallel Port pins as a multi-
plexed option (PPM), two enhanced Serial Ports, Infrared
Comunication Port (HP-SIR, Sharp-IR, and Consumer
Electronics-IR), a full IEEE 1284 Parallel Port, a Keyboard
and Mouse Controller (KBC), System Wake-Up Control
(SWC), General-Purpose Input/Output (GPIO) Ports with
assert interrupt capability, and Fan Speed Control (FSC).
Outstanding Features Fan Speed Control for two fans 11 General-Purpose I/O Ports, bi-directional, with in-
terrupt assertion capability System Wake-Up Control powered by VSB, generates
power-up request in response to preprogrammed key-
board or mouse sequence, modem, telephone ring,
and two general-purpose events without an external
clock Serial or parallel IRQ support Programmable write protect for Floppy Disk Controller Power-fail recovery support
Block DiagramController
System Wake-Up
IEEE 1284
Wake-Up
Parallel Port
PortsKeyboard and Mouse
Interface
Floppy Disk
Controller
Keyboard and Mouse
Control
Events
Host Interface
ISA
Interface SERIRQ
I/O Ports
General-Purpose
I/O
PWUREQ
Serial Port 2
Serial Infrared
Interface Interface
Serial Port 1
Serial
InterfaceSB
VBAT
FANOUT0 FANOUT1
Fan Speed Control
with IR
Floppy Drive
Interface
Interface
Parallel Port/
Floppy Drive
PPM
