PC87360 datasheet(72/168 Pages) NSC

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3.0

System Wake-Up Control (SWC)

3.1

OVERVIEW

The SWC recognizes the following maskable system events:

Modem ring (RI1 and RI2 pins)

Telephone ring (RING input pin)

Keyboard activity or speciﬁc programmable key sequence

Mouse activity or speciﬁc programmable sequence of clicks and movements

Programmable Consumer Electronics IR (CEIR) address

Wake-up on module IRQs for FDC, Parallel Port, Serial Ports 1 and 2, Mouse, KBC, ACB, Fan Speed Control and

Monitor (FSCM) and WATCHDOG Timer (WDT)

Eight VSB-powered, general-purpose input events (via GPIOE0-5 and GPIE6-7)

23 VDD-powered, GPIO-triggered events (via GPIO00-07, GPIO10-14, GPIO16-17 and GPIO40-47)

Software event.

The SWC notifies the device when any of these events occur by asserting one or more of the following output pins:

Power-Up Request (PWUREQ)

System Management Interrupt (SMI)

Interrupt Request (via SERIRQ)

Figure 7 shows the block diagram of the SWC.

Figure 7. SWC Block Diagram

In addition to the event detection and system notification capabilities, the SWC operates several general-purpose I/O pins

3.2

FUNCTIONAL DESCRIPTION

The SWC monitors 16 system events or activities. Upon entering the SWC, the events pass through a filter (where applica-

ble) and polarity adjustment logic. After filtering and polarity adjustment, each event enters the Wake-Up Mode Control (Ex-

tension) Logic which determines its effect during the various system power states. See Figure 7 for an illustration of this

mechanism.

Filters

and

Polarity

Selection

Wake-Up

Extension

Mechanism

Wake-Up Event

Detection

and Routing

Wake-Up

Event

Sources

SWC IRQ

SWC SMI

PWUREQ

Wake-Up

Extension

Enable

Registers

Wake-Up

Configuration

and Control

Registers

ACPI

Enable, Status

and Routing

Registers

PC87360 Datasheet(PDF) 72 Page - National Semiconductor (TI)

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