Reference Manual

Table Of Contents

The ConnectCore 8X System-on-module Power interfaces

ConnectCore® 8X System-on-Module Hardware Reference Manual --

Preliminary

System-on-module power rails distribution

The ConnectCore 8X requires three primary power supply inputs: VSYS, VSYS2, and VCC_MCA:

n VSYS and VSYS2 are the input power supplies to the on-module NXP PF8100 Power

Management IC (PMIC), as well as to most of its regulators. Some PMIC regulators are

internally dedicated to powering the module, while others power external circuitry.

n VCC_MCA is the input power supply of the on-module Digi Microcontroller Assist.

Two additional linear dropout regulators (LDO3 and LDO4), which have a dedicated input power line,

are available to power carrier board external circuitry. These additional regulators are not mandatory.

The following table summarizes the PMIC regulators of the ConnectCore 8X SOM:

PMIC

regulator

SoM power rail

name

Input

power

supply

Internally

used

Externally

available Comments

SW1 - VSYS2 YES NO

SW2 - VSYS2 YES NO

SW3 - VSYS2 YES NO

SW4 - VSYS2 YES NO

SW5 - VSYS2 YES NO

SW6 1V8 VSYS2 YES YES General purpose 1.8V power

rail for external circuitry. Also

used internally in the SOM.

SW7 3V3 VSYS YES YES General purpose 3.3V power

rail for external circuitry. Also

used internally in the SOM.

LDO1 VCC_SCU_1V8 VSYS2 YES YES Power supply for the i.MX 8X

System Control Unit (SCU).

Digi recommends not using

this power rail externally

unless otherwise noted.

LDO2 VDD_EMMC0 VSYS2 YES YES Used for powering the

internal eMMC0 memory. Digi

recommends not using this

power rail externally unless

otherwise noted.

LDO3 LDO3 LDO3IN NO YES

LDO4 LDO4 LDO4IN NO YES