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9. Power Supply And System Resets
9.1 Power Source
The SOM-IMX8M-MINI have built-in power management function, so it is only need to provide a +5V
power source to the SOM-IMX8M-MINI via the 5V input pins of the J1 connector.
The power consumption is requested
2A/5V(10 W)
at least for the IMX8M-MINI-SOM board to be
working properly.
9.2 Power Control and Monitoring
Power control and monitoring on the IMX8M-IMX8M-MINI is implemented using the ROHM Power
Control Integrated Circuit (PMIC) BD71847MWV-E2, designed specifically for the NXP i.MX8M MINI
family of application processors.
The BD71847MWV-E2 provides Dynamic Voltage Scaling via I²C bus. The PMIC is accessible on the
i.MX8M I2C1 bus for read and write at addresses 0x97 and 0x96, respectively.
9.3 System power
The SOM requires 5V as power input (at 5V_IN). The SOM then generates the power rails for all SOM
components through the on-board ICs. Tolerance for power supply is 5V +/- 0.3V.
Caution:
(1)
Do not connect the ETH _2V5/ VDD_3V3/ NVCC_SD2 power output pins to any high current
devices or you might brownout the system. These power lines are shared with internal SOM circuits,
so there is no safe limit for a high current device, but you can safely use them for low current tasks
such as for a level shifter or pullup/down.
(2)
Do not connect any of the 3.3V I/O pins to a device that draws more than 82 mA of power or you
will brownout the system.
(3) You must provide a cooling solution to ensure the SOM surface maintains an operational
temperature as specified in the environmental reliability section. You can use the SOM's threaded
standoffs to mount a passive or active cooling solution.
9.4 Power Consumption Typical Values
The following table lists the power draw for certain SOM components during different operational
tests.
It is only a reference value, the actual values also relates to the sources of the SOM module you are
using.
Table9.1 Power Consumption
Operational Test
SOM Power Values
Sleep
Idel
High Performance
