PC8374L Datasheet, PDF (1/239 Pages) National Semiconductor (TI) – SensorPathTM SuperI/O with Glue Functions

Winbond Electronics Corp. Advanced PC Product Center
Preliminary
May 2004
Revision 1.1
PC8374L
SensorPath^TM SuperI/O with Glue Functions
General Description
The National Semiconductor PC8374L Advanced I/O prod-
uct is a member of the PC837x SuperI/O family. All PC837x
devices are highly integrated and are pin and software com-
patible, thus providing drop-in interchangeability and
enabling a variety of assembly options using only a single
motherboard and BIOS.
PC8374L integration allows for a smaller system board size and
saves on total system cost.
The PC8374L includes legacy SuperI/O functions, system
glue functions, health monitoring and control, commonly
used functions such as GPIO, and ACPI-compliant Power
Management support.
The PC8374L 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 PC8374L device through an LPC
Bus Interface.
The PC8374L 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.
The PC8374L supports both I/O and memory mapping of
module registers and enables building legacy-free systems.
Outstanding Features
■ SensorPath^ interface to LMxx sensor devices for system
health support
■ Fan monitor and control
■ Heceta6-compatible register set, accessible via the LPC
interface and SMBus
■ Glue functions to complement the South Bridge func-
tionality
■ V_SB3-powered Power Management with 19 wake-up
sources
■ Controls three LED indicators
■ 16 GPIO ports with a variety of wake-up options
■ I/O-mapped and memory-mapped registers
■ Legacy modules: Parallel Port, Floppy Disk Controller
(FDC), two Serial Ports, Slow InfraRed Port and a Key-
board and Mouse Controller (KBC)
■ LPC interface, based on Intel’s LPC Interface Specifica-
tion Revision 1.1, August 2002
■ PC01 Revision 1.0 and Advanced Configuration and
Power Interface (ACPI) Specification Revision 2.0 compliant
■ 128-pin PQFP package
Block Diagram
South Bridge
LPC Bus
System
BIOS
SMBus I/F
V_BAT
Reset
Logic
Power Management
PC8374L
Serial Interfaces
Parallel Port Interfaces
Floppy Drive Interface
PS/2 Interfaces
KBC Ports
Infrared Interface
GPIO Ports
LEDs
SensorPath^TM I/F
Tacho
LMxx Sensors
Power
Supply
PWM
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National Semiconductor and TRI-STATE^ are registered trademarks of National Semiconductor Corporation.
SensorPath^ is a trademark of National Semiconductor Corporation.
All other brand or product names are trademarks or registered trademarks of their respective holders.
© 2004 National Semiconductor Corporation
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