DIGITAL-LOGIC SmartModule Express SMX945 Manuel d'utilisateur télécharger pdf (Page 20)

Kontron Compact Computers AG SMX945 Detailed Manual V1.1

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

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 85 86

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DIGITAL-LOGIC SmartModule Express SMX945 Manuel d'utilisateur Page 20