ConnectCore for i.MX51
©2011DigiInternational,Inc. 132
consumption measurements. A different kernel (Linux or Windows CE) with a different driver
configuration will show different current consumption values.
The ConnectCore for i.MX51 module can be powered from an external battery (VLIO) or from
a battery charger (VCHRG). Current drawn by the modules is different depending on the
supply voltage used. The following tables show the current drawn by the module from the
two power supplies.
The current drawn by the module is highly dependent on the number and type of interfaces
used. To make some current measurements three different interface configurations have
been defined:
The ConnectCore for i.MX51 supports several power modes. The current drawn by the module
is highly dependent on the power modes. To make some current measurements five different
power modes have been defined:
The tables below show the current drawn by the module for the different power modes and
the different interface configurations.
Interface Configuration Interfaces Used
Minimum Console, Ethernet.
+3.3V of development board drawn from external power supply.
Typical VGA, USB Host (two devices connected), Audio, Ethernet, Console.
+3.3V of development board drawn from module.
Maximum Display1, Display2, Camera1, Camera2, USB OTG, USB Host (four devices
connected), Audio, Ethernet, Console, WLAN, SD Card, microSD
TM
Card.
+3.3V of development board drawn from module.
Interface Configuration Interfaces Used
Full Load System running at 100% CPU load.
Normal Normal operating state. User interacting with the device.
User Idle After a long period of user inactivity some devices are turned off.
System Idle In this state the user is not using the system, even passively, and devices that are
not actively doing work are turned off.
Suspend This is the sleep state, no threads are running, the CPU is idle, the peripherals are
turned off, and the system can wake up only by means of hardware wake-source
interrupt.
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