Mca Firmware Update - Digi ConnectCore 8X Hardware Reference Manual

The ConnectCore 8X System-on-module
provides a configurable debounce filter to improve noise immunity and filter rebounds on push
buttons. When the PWR_IO signal is asserted low, one of the following events occurs:
If the duration of the assertion is short (time configurable by the user) the system will trigger
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an interrupt that, commonly, indicates the host processor that the system should enter
suspend state. When the system is in a low-power mode, the effect of a short assertion of this
line is the following:
While in suspend state, it will wake the system.
l
While in OFF state, it will boot the system.
l
If the low-pulse duration is long enough (again, time-configurable by the user) the system
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triggers the power off interrupt, to tell the host processor to start a transition to OFF state.
If the system does not enter OFF state before a configurable guard timer expires, the MCA will
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automatically set the OFF state unless the user explicitly cancels it by writing to the mca_
cancel_pwroff entry in the sysfilesystem.
MCA_VIN_DET signal
The on-module MCA is powered from a dedicated external power rail, VCC_MCA. As recommended in
the reference designs (see
by an external 3.3V regulator. If the system requires system time to be kept when there is no power,
you must use a coin-cell battery to power the MCA while it keeps the RTC up to date in low-power
mode. The MCA uses the MCA_VIN_DET input to monitor the input voltage of the whole system and
automatically switch to RTC mode when it is disconnected, to keep the system time and save power.
MCA_VIN_DET is a digital line, not analog. This means that the transition time between high and low
values is crucial to optimize the time the system takes to switch to RTC mode. Digi recommends you
ensure a fast discharge of this signal to allow a quick fall time.

MCA firmware update

The i.MX 8X processor can update the firmware of the MCA. See the
additional information about the MCA firmware update process.
ConnectCore® 8X System-on-Module Hardware Reference Manual
System-on-module power rails
The Micro Controller Assist™ hardware
distribution), this power supply is provided
MCA software documentation for
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