Datasheet

Caution: Do not connect the 1.8V/3.3V 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 pull-

up/down.

Caution: 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.

Power signals

Even though there are multiple power signals defined in the board-to-board connectors, only the VSYS_5V and ground

connections are required. All others are optional.

Note: Make sure to route

all

the VSYS_5V and GND pins, and add decoupling (bypass) capacitors between

VSYS_5V and GND near the mating connector pins.

Version 1.2 (August 2019)

Table 6. Power and reset pin signals

Name Type Connector Pins Voltage Description

VSYS_5V Power J1312 93, 94, 95, 96, 97, 98, 99, 100 5V Main 5V power input to

SoM.

Must be connected.

GND Power J1312 9, 10, 65, 66, 71, 72, 77, 78, 83, 84 Common ground.

Must be connected.

GND Power J1311 1, 2, 7, 8, 13, 14, 19, 20, 25, 26, 31,

33, 37, 38, 43, 44, 49, 50, 55, 56,

61, 62, 67, 68, 73, 74, 79, 80, 86, 89,

90, 94, 99, 100

Common ground.

Must be connected.

GND Power J1310 1, 2, 7, 25, 39, 40, 42, 44, 45, 46,

50, 51, 56, 57, 62, 63, 64, 65, 66,

67, 68, 69, 70, 71, 72, 73, 74, 75, 76,

77, 78, 80

Common ground.

Must be connected.

DCDC_3V3 Power J1310 84, 86, 88, 90 3.3V 3.3V output from SoM.

Can be left floating if not

used. Not for high-current

usage; can be used to pull-

up GPIO.