BCM ESM-APLM, User Manual

Page: 23 / 77

ESM-APLM User
’s Manual
ESM-APLM User
’s Manual
23
2.3.2.1.5 LPC Signals
Signal Signal Description
LPC_FRAME# LPC frame indicates the start of an LPC cycle
LPC_AD[0:3] LPC multiplexed address, command and data bus
LPC_CLKOUT1 LPC clock output - 33MHz nominal
LPC_SERIRQ LPC serial interrupt
2.3.2.1.6 GPIO Signals
Signal Signal Description
GPI[0:4] General purpose input pins.
GPO[0:4] General purpose output pins.
2.3.2.1.7 Power & System Management Signals
Signal Signal Description
SUS_S3# Indicates system is in Suspend to RAM state. Active low output.
BATLOW# Indicates that external battery is low
PWRBTN# Power button to bring system out of S5 (soft off), active on rising edge.
SMB_SCL_S5 System Management Bus bidirectional clock line.
SMB_SDA_S5 System Management Bus bidirectional data line.
SMB_ALERT#
System Management Bus Alert - input can be used to generate an SMI# (System
Management Interrupt) or to wake the system.
SUS_STAT# Indicates imminent suspend operation.
PWR_OK Power OK from main power supply
SYS_RESET# Reset button input. Active low input.
WAKE0# PCI Express wake up signal.
WAKE1# General purpose wake up signal.