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National Semiconductor Electronic Components Datasheet

PC87382 Datasheet

LPC-to-LPC Switch for Docking Stations/ with Fast Infrared Port/ Serial Port and GPIOs

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December 2003
Revision 1.2
PC87382
LPC-to-LPC Switch for Docking Stations, with Fast
Infrared Port, Serial Port and GPIOs
General Description
The PC87382, a member of the National Semiconductor LPC
SuperI/O family, is targeted for a wide range of portable ap-
plications. The PC87382 is PC2001 and ACPI compliant, and
features an LPC-to-LPC Switch with hot plugability, Fast In-
frared port (FIR, IrDA 1.1 compliant), Serial Port, and Gener-
al-Purpose Input/Output (GPIO) support for a total of eight
ports.
The PC87382 enables glueless implementation of an LPC-
to-LPC Switch between the motherboard LPC bus and the
Docking Station, and supports hot insertion and hot removal.
Outstanding Features
q LPC-to-LPC Switch with hot plugability, enables LPC
devices in the Docking Station to be connected to the
Main LPC Bus, thus reducing the number of signals re-
quired through the Docking Station connector
q LPC bus interface, based on Intel’s LPC Interface
Specification Revision 1.1, August 2002 (supports
CLKRUN signal)
q Fast Infrared port
q PC2001 and ACPI Revision 2.0 compliant
q Serial IRQ support (15 options)
q Protection features, including GPIO lock and pin con-
figuration lock
q Eight GPIO ports, including with “assert IRQ” capability
q XOR Tree and TRI-STATEdevice pins (or ICT) test-
ability modes.
q 5V tolerant and back-drive protected pins (except LPC
bus pins)
q 48-pin LQFP package
System Block Diagram
LPC Bus
South Bridge
TPM
Embedded
Controller
I/O
Ports
Portable
Platform
Docking
Station
PC87382
Serial Infrared
Interface Interface
Docking LPC Bus
DCLKOUT
Docking
SIO
National Semiconductor and TRI-STATEare registered trademarks of National Semiconductor Corporation.
All other brand or product names are trademarks or registered trademarks of their respective holders.
©2003 National Semiconductor Corporation
www.national.com


National Semiconductor Electronic Components Datasheet

PC87382 Datasheet

LPC-to-LPC Switch for Docking Stations/ with Fast Infrared Port/ Serial Port and GPIOs

No Preview Available !

Features
LPC System Interface
8-bit I/O cycles
CLKRUN support
Implements PCI mobile design guide recommenda-
tion (PCI Mobile Design Guide 1.1, Dec. 18, 1998)
LPC-to-LPC Switch
Hot plugability
CLKRUN support
The connection is controlled by software
Low switch resistance and propagation delay
Programmable Clock to Reset Delay
PC2001 and ACPI Compliant
PnP Configuration Register structure
Flexible resource allocation for all logical devices
Relocatable base address
15 IRQ routing options
Two optional 8-bit DMA channels (where applica-
ble) selected from four possible DMA channels
Clock Sources
14.318 MHz or 48 MHz clock input
LPC clock, up to 33 MHz
14.318 MHz or 48 MHz clock output to the docking
station
Power Supply
3.3V supply operation
All pins are 5V tolerant, except LPC bus pins
All pins are back-drive protected, except LPC bus pins
Eight General-Purpose I/O (GPIO) Ports
Support assert IRQ
Programmable drive type for each output pin (open-
drain, push-pull or output disable)
Programmable option for internal pull-up resistor on
each input pin
Output lock option
Input debounce mechanism
Serial Port (SP1)
Software compatible with the 16550A and the 16450
Shadow register support for write-only bit monitoring
UART data rates up to 1.5 Mbaud
Fast Infrared Port (FIR)
Software compatible with the 16550A and the 16450
Shadow register support for write-only bit monitoring
FIR IrDA 1.1 compliant
HP-SIR
ASK-IR option of SHARP-IR
DASK-IR option of SHARP-IR
Consumer Remote Control supports RC-5, RC-6,
NEC, RCA and RECS 80
DMA support: 1 or 2 channels
Strap Configuration
Base Address (BADDR) strap to determine the base
address of the Index-Data register pair
Strap Inputs to select testability mode
Testability
XOR Tree
TRI-STATE device pins
Internal Block Diagram
14.31818 MHz
LPC Interface
Clock
Generator
48 MHz
GPIO Ports
Serial Port 1
Bus
Interface
FIR
Docking
LPC Switch
Ports
I/O
Serial
Interface
Infrared
Interface
Docking LPC
Interface
www.national.com
2
Revision 1.2


Part Number PC87382
Description LPC-to-LPC Switch for Docking Stations/ with Fast Infrared Port/ Serial Port and GPIOs
Maker National Semiconductor
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