Advantech SOM-5991, User Manual

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SOM-5991 User Manual 8
 BIOS
BIOS chip is on module by default. Also allows user to place BIOS chip on car-
rier board with appropriate design and jumper setting on BIOS_DIS#[1:0].
1.3.6.6 Power Management
 Power Supply
Supports both ATX and AT power modes. VSB is for suspend power and can be
an option if not requiring standby (suspend-to-RAM) support. RTC Battery may
be option if keep time/date is not required.
VCC: 8.5V (9V-5%) – 20V (19V+5%)
VSB: 5V +/- 5% (Suspend power)
RTC Battery Power: 2.0V – 3.3V
 PWROK
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.
 Power Sequence
According to PICMG COM Express R2.1 specification
 Wake Event
Various wake-up events allow users to apply different scenarios.
Wake-on-LAN(WOL): Wake to S0 from S3/S4/S5
USB Wake: Wake to S0 from S3/S4
PCIe Device Wake: depends on user inquiry and may need customized BIOS
LPC Wake: depends on user inquiry and may need customized BIOS
 Advantech S5 ECO Mode (Deep Sleep Mode)
Advantech iManager provides an additional feature to allow the system enter a
very low suspend power mode – S5 ECO mode. In this mode, the module will
cut all power including suspend and active power into the chipset and keep the
on-module controller active. Therefore, only less than 50mW power will be con-
sumed which means the user’s battery pack can last longer. With this mode
enabled in BIOS, the system (or module) will only allow a power button to boot
rather than others such as WOL.
BIOS_DIS0# BIOS_DIS#1 Boot up destination/function
Open Open Boot from Module’s SPI BIOS
GND Open Boot from Carrier Board LPC/FWH BIOS
Open GND SPI_CS0# to Carrier Board, SPI_CS1# to Module
GND GND SPI_CS0# to Module, SPI_CS1# to Carrier Board
Note! If system COMS are cleared, we strongly suggest you to go into the
BIOS setup menu and load the default setting at the first time of boot up.