Reference Manual

The ConnectCore 8X System-on-module Power interfaces
ConnectCore® 8X System-on-Module Hardware Reference Manual --
Preliminary
14
PMIC
regulator
SoM power rail
name
Input
power
supply
Internally
used
Externally
available Comments
VSNVS VCC_SNVS_
LDO_1V8
VSYS / VCC_
LICELL
YES YES An always-on power domain
of the CPU that powers
some core functionality of
the SOM. Do not use this
power rail externally.
Note VCC_LICELL is the input power for the PMIC VSNVS regulator, which is normally used to power
the CPU in low-power mode (RTC). This pin also supports coin cell charger functionality for Li-ion
rechargeable batteries or supercapacitors. However, RTC mode in the ConnectCore 8X is supported
by the ConnectCore 8X MCA, not by the i.MX 8X. Therefore, in order to supply the RTC of the system,
do not use VCC_LICELL as an input power rail. Instead, follow the configuration explained in RTC
power and coin cell charger.
In addition to the input power supplies of the PMIC, other power domains of the SOM must also be set
externally. This allows power management flexibility so you can adapt the input voltage of the
different interfaces. The following table lists the input power rails that must be powered externally to
the SOM together with the devices/power domains they power:
Input rail
Device being
powered
Internal power domains being
powered Description
VCC_MCA Digi
Microcontroller
Assist
Full device Input power
supply for the
ConnectCore 8X
MCA. This power
domain is
mandatory.