PC87373 Datasheet, PDF (1/174 Pages) National Semiconductor (TI) – LPC SuperI/O with Glue Functions

Preliminary
October 2002
Revision 1.1
PC87373
LPC SuperI/O with Glue Functions
General Description
The National Semiconductor^® PC87373 Advanced I/O prod-
uct is a member of the PC8737x SuperI/O family. All
PC8737x devices are highly integrated and are pin and soft-
ware compatible, thus providing drop-in interchangeability
and enabling a variety of assembly options using only a sin-
gle motherboard and BIOS.
PC87373 integration allows for a smaller system board size and
saves on total system cost.
The PC87373 includes legacy SuperI/O functions, system
glue functions, fan monitoring and control, commonly used
functions such as GPIO, and ACPI-compliant Power Man-
agement support.
The PC87373 integrates miscellaneous analog and digital
system glue functions to reduce the number of discrete
components required. The host communicates with the
functions integrated in the PC87373 device through an LPC
Bus Interface.
The PC87373 Legacy functions are: two serial ports, a fully
compliant IEEE 1284 Parallel Port, a Floppy Disk Controller
(FDC), a Keyboard/Mouse Controller (KBC), a Game Port
and a MIDI Port.
The Fan Speed Control and Monitor (FSCM) module allows
the system to monitor and control three fans.
The PC87373 extended wake-up support complements the
ACPI controller in the chipset. The System Wake-Up Control
(SWC) module, powered by V_SB3, supports a flexible wake-
up mechanism.
There are 13 General-Purpose Input/Output (GPIO) ports;
these allow system control and wake-up on system events.
Outstanding Features
s Legacy modules: Parallel Port, Floppy Disk Controller
(FDC), two Serial Ports, Keyboard and Mouse Control-
ler (KBC), Game Port and MIDI Port
s Glue functions to complement the South Bridge func-
tionality
s Fan Speed monitoring and control of three fans
s V_SB3-powered Power Management with 20 wake-up
sources
s Controls three LED indicators
s 13 GPIO ports with a variety of wake-up options
s LPC interface, based on Intel’s LPC Interface Specifica-
tion Revision 1.0, September 29th, 1997
s PC01 Revision 1.0 and Advanced Configuration and Pow-
er Interface (ACPI) Specification Revision 2.0 compliant
s 128-pin PQFP package
Block Diagram
14.31818
MHzInMteIrDfaIce
Joystick
Interface
Serial
Interface
Serial
Interface
Parallel
Port
Interface
Floppy
Drive PS/2 KBC LPC Serial
Interface Interfaces Ports Interface IRQ
Clock MIDI
Generator Port
48 MHz
Game
Port
Serial
Port 1
Serial
Port 2
IEEE 1284 Floppy
Parallel
Disk
Port
Controller
Keyboard
& Mouse
Controller
Internal Bus
LPC Bus
Interface
V_DD3
Fan Speed
Control and
Monitor
Glue
Functions
System
Wake-Up
Control
GPIO Ports
Tachometer PWM
Inputs Outputs
Miscellaneous
Wake-Up _PME
I/O
V_{BAT Events LEDs}
I/O
Ports
PnP
Configuration
Registers
V_SB3
32.768 KHz
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