SMARC-sAMX7 User Guide. Rev. 1.9
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6.5.
Power Control
6.5.1.
Power Supply
The SMARC-sAMX7 supports a power input from 3.0 to 5.25V. The supply voltage is applied through the VCC pins
(VCC) of the module connector. Considered current rating of protective device is part of End-Equipment.
6.5.2.
Power Button (POWER_BTN#)
The power button (Pin P128) 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 50 ms (50 ms ≤ t < 4 s, typical 400 ms) at low level
(Power Button Event).
Pressing the power button for at least 4 seconds will turn off power to the module
(Power Button Override).
6.5.3.
Power Bad Signal (VIN_POWER_BAD#)
The SMARC-sAMX7 provides an external input for a Carrier Board Power Bad signal (Pin S150). The implementation
of this subsystem complies with the SMARC Specification. VIN_POWER_BAD# is internally pulled up to 3.3V and
must be high level to power on the module.
6.5.4.
Reset Button (RESET_IN#)
The reset button (Pin P127) is available through the module connector described in the pinout list. The module will
stay in reset as long as RESET_IN# is grounded.
The following parameters should be delivered from the carrier board:
Voltage Ripple maximum 100 mV peak to peak 0-20 MHz to 20 ms rise time from
input voltage <10% to nominal VCC
Max allowed inrush current: connector limit (15 W @ 3,0 V)
