PC87373 datasheet(4/174 Pages) NSC

4 / 174 page

Features (Continued)

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Revision 1.1

Keyboard Events

— Wake-up on any key

— Supports programmable 8-byte sequence “Pass-

word” or “Special Keys” for Power Management

— Simultaneous recognition of three programmable

keys (sequences): “Power”, “Sleep” and “Resume”

— Wake-up on mouse movement and/or button click

Clocking, Supply, and Package Information

Clocks

— LPC (PCI) clock input (up to 33 MHz)

— Low-frequency 32.768 KHz clock input, active also

in S3-S5 (when VDD3 is off), for:

❏

System Wake-Up Control (SWC) wake-up timing

❏

LED blink timing

❏

Glue Functions timing

— On-chip Clock Generator:

❏

Generates 48 MHz for the SuperI/O modules

and FSCM

❏

Based on the 14.31818 MHz clock input

❏

VDD3 powered

Protection

— All device pins are 5V tolerant and back-drive pro-

tected (except LPC bus pins

— High ESD protection of all the device pins

— Pin multiplexing selection lock

— Conﬁguration register lock

Testability

— XOR tree structure

❏

Includes all the device pins (except the supply

and the analog pins)

❏

Selected at power-up by strap input (TEST)

— TRI-STATE device pins, selected at power-up by

strap input (TRIS)

Power Supply

— 3.3V supply operation

— Separate pin pairs for main (VDD3) and standby

(VSB3) power supplies

— Backup battery input (VBAT) for SWC indications

— Low standby power consumption

— Very low power consumption from backup battery

(less than 0.5

µA)

Package

— 128-pin PQFP

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