User manual

Kontron Compact Computers AG SMX945 Detailed Manual V1.1
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3. PC FUNCTIONAL DESCRIPTION
3.1. Power Input
The SMX945 module uses a single main power rail with a nominal value of +12V. Kontron Compact
Computers has expanded the 12Volt input to a wide-range input, working between 5Volt and 18Volt.
Main supply: 5.0Volt (-0.1V) to 18Volt ( +0V) with 20-30Watt depending on the processor.
The sources of the main supply may be:
 12Volt supply as the COMexpress Specs define
 Single 5Volt systems such as PC/104express
 Battery supplied systems (Li-ion with 14.4Volt nominal)
 Vehicle supply, nominal with 12V
Two additional voltage inputs are specified:
 +5V Always (0.1Amp) = VCC_5V_SBY = VCC5ALWAYS
 +3V-3.6V battery input to power the module Real-time Clock (RTC) circuit
3.1.1. Power Supply Sequencing