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5/ Installation
5.1. Power Control
5.1.1.
Power Supply
The SoM can be powered from a single 3.3V power Source at VCC pins. The VDD_SNVS_IN pin can be connected to
an external battery. If no external battery is used, it is mandatory to connect this pin to VCC.
NVCC_SD1 is used to power the SDIO1 interface. If UHS‐I mode is used, card voltage must be lowered to 1.8 V
according to pin SDIO1_VSELECT. If UHS-I mode is not used, NVCC_SD1 can be connected to VCC.
Small decoupling capacitors like 100nF should be used for each supply pin an should be placed as close as possible.
If USB is unused VBUS can be left floating. Otherwise connect VBUS to +5 V.
The following parameters should be delivered from the carrier board:
5.1.2.
Supply voltage
Table 7: Supply voltage
Voltage
VCC
VDD_SNVS_IN
USB_OTG1/2_VBU
S
NVCC_SD1
5.1.3.
Supply current
Table 8: Supply current
Use case
Linux running
A7 heavy load
At power on, the SoM can cause a current spike of up to 1.5 A for 5 µs.
Make sure to have a low impedance path from the supply to the SoM or
enough capacity to buffer the spike, otherwise the resulting voltage
drop will lead to male function.
5.2. Reset pin
A low level at __RESET_IN triggers a reset. The module will stay in reset as long as __RESET_IN is grounded. If
unused, this pin can be left floating. No external components are required.
www.kontron-electronics.de
Voltage Ripple maximum 100 mV peak to peak 0-20 MHz, 20 ms rise time from input voltage
<10% to nominal VCC
nominal
min
3.3 V
3.0 V
3.3 V
2.4 V
5.0 V
4.4 V
3.3/1.8 V
1.65 V
mean
110 mA
190 mA
max
3.6 V
3.6 V
5.5 V
3.6 V
max
-
260 mA
SL iMX6UL/ULL - Rev. 0.4
// 25
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