User manual

55 AIMB-781 User Manual
Chapter 3 BIOS Operation
3.4.2 South Bridge
Figure 3.26 South Bridge
SMBus Controller
“Enable or Disable” SMBus Controller.
LAN2 Controller
“Enable or Disable” LAN2 Controller.
LAN Option-ROM
“Enable or Disable” LAN Option-ROM.
Wake on LAN from S5
“Enable or Disable” Wake on LAN from S5.
PCIE STRAP
It could be set as "PCIE x4" or "4 PCIE x". When using Advantech x4 to 3 x1 riser
card, this item should been set as "4 PCIE x1".
High Precision Timer
“Enable or Disable” High Precision Event Timer.
Deep S5
“Enable or Disable” Deep S5 feature. When Deep S5 is enabled, most power, includ-
ing 5VSB, will be off during Deep S5 for energy savings.
Note! When a system enters G3 status with deep S5 enabled, some power
supply's 5VSB won't drop until after more than 30 seconds. If "Restore
AC Power Loss" is set to "power on", the system won't boot up in 30
seconds after power failure. We recommend the user wait for more than
30 seconds to power on after a power failure. On the other hand, system
will
auto power on if power is restored within 30 seconds, before 5VSB
actually drops, even if "Restore AC Power Loss" is set to "power off".