Power and system management – ADLINK Express-IBE2 User Manual

Page 25

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Express-IBE2

Page 25

3.3.15. Power And System Management

Signal

Pin

Description

I/O

PU/PD

Comment

PWRBTN#

B12 Power button to bring system out of S5 (soft off), active on falling edge.

I 3.3VSB

PU 10k 3.3VSB

SYS_RESET# B49 Reset button input. Active low request for module to reset and reboot. May

be falling edge sensitive. For situations when SYS_RESET# is unable to
reestablish control of the system, PWR_OK or a power cycle may be used.

I 3.3VSB

PU 10k 3.3VSB

CB_RESET#

B50 Reset output from module to Carrier Board. Active low. Issued by module

chipset and may result from a low SYS_RESET# input, a low PWR_OK
input, a VCC_12V power input that falls below the minimum specification, a
watchdog timeout, or may be initiated by the module software.

O 3.3VSB PU 10k 3.3VSB

PWR_OK

B24 Power OK from main power supply. A high value indicates that the power is

good. This signal can be used to hold off Module startup, to allow carrier
based FPGAs or other configurable devices time to be programmed.

I 3.3V

PU 10k 3.3V

SUS_STAT#

B18 Indicates imminent suspend operation; used to notify LPC devices.

O 3.3VSB

SUS_S3#

A15 Indicates system is in Suspend to RAM state. Active-low output. An inverted

copy of SUS_S3# on the carrier board (also known as “PS_ON”) may be
used to enable the non-standby power on a typical ATX power supply.

O 3.3VSB

SUS_S4# A18

Indicates

system is in Suspend to Disk state. Active low output.

O 3.3VSB

SUS_S5#

A24 Indicates system is in Soft Off state.

O 3.3VSB

WAKE0#

B66 PCI Express wake up signal.

I 3.3VSB

PU 10k 3.3VSB

WAKE1#

B67 General purpose wake up signal. May be used to implement wake-up on

PS/2 keyboard or mouse activity.

I 3.3VSB

PU 10k 3.3VSB

BATLOW#

A27 Battery low input. This signal may be driven low by external circuitry to signal

that the system battery is low, or may be used to signal some other external
power-management event.

I 3.3VSB

PU 10k 3.3VSB

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