Kontron SMARC-sA3874i - Manual (Page 48)

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User’s Guide
3.5.5 Power Consumption
Power figures are given in the table below for the Module power consumption in various situations. These are
Module power figures. Off-Module power consumption (e.g. display backlight, display power, Carrier board devices)
is not included here. What is included in these power figures: everything on the Module – the TI Cortex A8 SoC,
the DDR3 DRAM, the Module power supplies, the Module LVDS transmitter, the GBE controller and miscellaneous
Module circuits. Power measurement is done with MO-300 SATA Module, mini-PCIe Wi-Fi Module, HDMI Display &
Ethernet cable is present in the Evaluation carrier wherever it is not mentioned. Power figures are less for LVDS
display and it is not shown in the below table. The power figures below given below are subject to change.
State/Activity CPU
Freq Module
Power USB
Enabled? PCIe+GBE
Enabled? SATA
Enabled? Notes
Active state 1.0 GHz 5.9 W Yes Yes Yes Linux Desktop
Active state 1.0 GHz 6 W Yes Yes Yes 2D Graphics demonstration loop
Active state 1.0 GHz 6.5 W Yes Yes Yes 3D Graphics demonstration loop
Active state 1.0 GHz TBD Yes Yes Yes Stress test-85% CPU Load
Active state 1.0 GHz 4.7 W Yes Yes Yes MO-300 SATA, miniPCIe Module
not present & Etherent cable is
not plugged in.
Standby state - TBD Yes Yes Yes
Deep sleep state - TBD Yes Yes Yes
Standby state - TBD Yes No No
Deep sleep state - TBD Yes No No
There are many options, configurable in software. And there are trade-offs: for example, the “Power Save” option
does save power and the response to events such as keyboard and mouse activity can be sluggish. Evaluation
units are available from Kontron to allow users to check out some of these tradeoffs.