Power Management - Advantech SOM-5871 User Manual

1.3.10.13Smart Fan
Supports 2 Fan PWM control signal and 2 tachometer inputs for fan speed detection.
Provides 1 on module with connector and the other on the carrier board following
PICMG COM Express R3.0 specification.
1.3.10.14BIOS
BIOS chip is on module by default. Also allows the user to place BIOS chip on the
carrier board with appropriate design and jumper setting on BIOS_DIS#[1:0].
BIOS_DIS0#
Open
Open
GND
Note! If system COMS are cleared, we strongly suggest to go to the BIOS
setup menu and load default settings at the first time of boot up.
1.3.11

Power Management

1.3.11.1 Power Supply
Supports both ATX and AT power modes. VSB is for suspend power and can be
option if not require standby (suspend-to-RAM) support. RTC Battery may be option
if keep time/date is not require.
1.3.11.2 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.
1.3.11.3 Power Sequence
According to PICMG COM Express R3.0 specification
1.3.11.4 Wake Event
Various wake-up events supporting allow user to apply into different scenario.
 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
1.3.11.5 Advantech S5 ECO Mode (Deep Sleep Mode)
Advantech iManager provides additional features to allow the system to 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 an on-module control-
ler active. Therefore, only under 50mW of power will be consumed which means bat-
tery packs can last longer. While this mode is enabled in BIOS, the system (or
module) only allows a power button to boot rather than others such as WOL.
BIOS_DIS#1 Boot up destination/function
Open Boot from Module's SPI BIOS
GND SPI_CS0# to Carrier Board, SPI_CS1# to Module
GND SPI_CS0# to Module, SPI_CS1# to Carrier Board
VCC: 8.5V - 20V
VSB: 4.75V - 5.25V (Suspend power)
RTC Battery Power: 2.0V - 3.3V
11 SOM-5871 User Manual