2.3
Electrical Specifications
According to SMARC specifications, the LEVY module needs to be supplied only with an ex5V
DC
power supply.
For Real Time Clock working and CMOS memory data retention, it is also needed a backup battery voltage. All these voltages are supplied directly through card
edge fingers (see connector
’
s pinout).
All remaining voltages needed for board
’
s working are generated internally from +5V
DC
power rail.
2.3.1
Power Consumption
LEVY module, like all SMARC modules, needs a carrier board for its normal working. All connections with the external world come through this carrier board, which
also provides the required voltage to the board.
Measurements of power consumption from VDD_IN power rail (5V
DC
) that supplies the board are reported here for three different board factory configurations.
Please consider that power consumption is strongly dependent on the board
’
s configuration, on number of processor cores active and from the interfaces that are
SW enabled.
2.3.2
Power Rails meanings
In all the tables contained in this manual, Power rails are named with the following meaning:
VDD_IN: Module power input voltage. +5V voltage directly coming from the card edge connector.
VDD_RTC: Low current RTC circuit backup power. 3V coin cell voltage coming from the edge card for supplying the RTC clock on the I.MX 8M
_RUN: Switched voltages, i.e. power rails that are active only when the board is in ACPI s S0 (Working) state. Examples: +1.3.3V_RUN, +5V_RUN.
_ALW: Always-
ft Off) state. Examples: +5V_ALW, +3.3V_ALW.
Status
Processor
i.MX 8M Plus Quad
6GB LPDDR4
64GB eMMC
i.MX 8M Plus Quad
4GB LPDDR4
32GB eMMC
i.MX 8M Plus Quad
1GB LPDDR4
4GB eMMC
Video
LVDS
HDMI
eDP
Idle
2.78W
2.59W
2.23W
GPU and CPU working at full load, video reproduction of a 1080p video
4.87W
3.95W
4.52W
As above, with active two GbE and two USB 3.0 ports
6.61W
5.55W
5.72W
RTC Power consumption on VDD_RTC (when VDD_IN off)
300nA
