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4.2
Power Control
Power Supply
The microETXexpress®-DC has a wide range power input from 8.5V - 18V. The supply voltage is applied through the VCC
pins (VCC) of the module connector.
Power Button (PWRBTN#)
The power button (Pin B12) is available through the module connector described in the pinout list. To start the module via
Power Button the PWRBTN# signal must be at least 50ms (50ms ≤ t < 4s) at low level (Power Button Event).
Pressing the power button for at least 4seconds will turn off power to the module (Power Button Override).
Power Good (PWR_OK)
The microETXexpress®-DC provides an external input for a power-good signal (Pin B24). The implementation of this
subsystem complies with the COM Express® Specification. PWR_OK is internally pulled up to 3.3V and must be high level
to power on the module.
Reset Button (SYS_RESET#)
The reset button (Pin B49) is available through the module connector described in the pinout list. The module will stay in
reset as long as SYS_RESET# is grounded.
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