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National Semiconductor Electronic Components Datasheet

PC8374T Datasheet

Safe Keeper Desktop Trusted l/O

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PRODUCT BRIEF
August 2004
Revision 1.1
PC8374T
SafeKeeperDesktop TrustedI/O
General Description
The National Semiconductor PC8374T 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 en-
abling a variety of assembly options using only a single
motherboard and BIOS.
PC8374T integration allows for a reduced system board size
and saves on total system cost.
The PC8374T includes legacy SuperI/O functions, Trusted
Platform Module (TPM), system glue functions, health mon-
itoring and control, commonly used functions such as GPIO,
and ACPI-compliant Power Management support.
The Trusted Platform Module provides a solution for PC se-
curity, based on the TCG standard. The complete security
solution includes hardware, software, and firmware.
The PC8374T 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 PC8374T through an LPC Bus
Interface.
The PC8374T supports both I/O and memory mapping of
module registers and enables building legacy-free systems.
Outstanding Features
TCG 1.1b based Trusted Platform Module (TPM)
Integrated non-volatile secure storage
Hardware and software protection schemes
Tamper resistance schemes
Pin compatible to integrated TPM 1.2 device
Legacy modules: Parallel Port, Floppy Disk Controller
(FDC), two Serial Ports, Serial InfraRed Port and a Key-
board and Mouse Controller (KBC)
Glue functions to complement the South Bridge func-
tionality
System health support, including SensorPathsensor
interface, and fan monitor and control
VSB3-powered Power Management with 19 wake-up
sources
Controls three LED indicators
16 GPIO pins with a variety of wake-up options
I/O-mapped and memory-mapped registers
128-pin PQFP package
PC8374T System Block Diagram
South Bridge
System
BIOS
VBAT
SMBus I/F
LPC Bus
PC8374T
TPM
Power Management
SuperI/O
Serial Interface x 2
Parallel Port Interface
Floppy Drive Interface
PS/2 Interfaces
KBC Ports
Infrared Interface
GPIO
Wake-Up
Events
Physical
Presence
Reset
Logic
LEDs
SensorPathTM I/F
LMxx Sensors
Tacho
Power
Supply
PWM
DDrDvrrvv
National Semiconductor and TRI-STATEare registered trademarks of National Semiconductor Corporation.
SensorPathand SafeKeeperare trademarks of National Semiconductor Corporation.
All other brand or product names are trademarks or registered trademarks of their respective holders.
© 2004 National Semiconductor Corporation
www.national.com


National Semiconductor Electronic Components Datasheet

PC8374T Datasheet

Safe Keeper Desktop Trusted l/O

No Preview Available !

www.DataSheet4U.com
Features
Trusted Platform Module (TPM)
TCG 1.1b compliant
Processing Unit
16-bit embedded RISC processor core
Internal Memory
On-chip Non-Volatile memory for secure storage
On-chip data RAM
Host Interface
Using LPC Bus
Command/Data/Status standard interface
Secured General-Purpose I/O (GPIO)
Internal processor controlled
Three GPIO pins, one used for Physical Presence
I/O pins individually configured as input or output
Configurable internal pull-up resistors
Owner authorization control
Power Management Controller (PMC); power modes,
switched by software or hardware
TPM Firmware
VSB3 RAM-based storage for loadable keys
Tamper Resistance
Clock Jitter protection
Protection on reference clock
Protection of security functions from LPC clock
jitter
Power analysis resistance
Low and High Frequency monitor
Voltage attack detector
Low Voltage
Glitch and brownout detector
Secure storage contents protection
Permanent disable of all TPM test mechanisms
when locked
System Health Support
SensorPath interface to sensors optimizes digital/analog
partitioning
Simplifies board design and routing
Supports distributed sensors and centralized control
Health monitoring is self-contained and requires
minimal host attention
Faster boot time
Off loads SMBus, and enables ASF compliance
Fan Monitor and Control
Three PWM-based fan controls
Four 16-bit resolution tachometer inputs
Software or local temperature feedback control
Heceta6-compatible register set accessible via the LPC
interface and SMBus
Supports the following combinations of LMxx devices:
LM96011
LM96011 and LM95010
LM96012
LM96010
Simultaneous read support via LPC interface and SMBus
General-Purpose Modules
All 16 GPIO pins powered by VSB3
Each pin individually configured as input or output
Programmable features for each output pin:
Drive type (open-drain, push-pull or TRI-STATE)
TRI-STATE on detection of falling VDD3 for
VSB3-powered pins driving VDD-supplied devices
Programmable option for internal pull-up resistor on
each input pin (some with internal pull-down resistor op-
tion)
Lock option for the configuration and data of each output
pin
15 GPIO pins generate IRQ/SIOPME/SMI for wake-up
events; each GPIO has separate:
Enable control of event status routing to IRQ
Enable control of event status routing to SIOPME
Polarity and edge/level selection
Programmable debouncing
Glue Functions
Generates the power-related signals:
Main Power good
Power distribution control (for switching between
Main and Standby regulators)
Resume reset (Master Reset) according to the 5V
standby supply status
Main power supply turn on (PS_ON)
Voltage translation between 2.5V or 3.3V levels (DDC) and
5V levels (VGA) for the SMBus serial clock and data signals
Isolation circuitry for the SMBus serial clock and data signals
Buffers PCI_RESET to generate three reset output signals
Generates “highest active supply” reference voltage
Based on 3.3V and 5V Main supplies
Based on 3.3V and 5V Standby supplies
High-current LED driver control for Hard Disk Drive
activity indication
Software selectable alternative functionality, through pin
multiplexing
www.national.com
2
Revision 1.1


Part Number PC8374T
Description Safe Keeper Desktop Trusted l/O
Maker National Semiconductor
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