Reset Control - Digi ConnectCore 8X Hardware Reference Manual

Advanced power management such as power key button, wake up sources, and PMIC control
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in low power.
Peripheral extensions such as RTC, watchdog, and tamper pins.
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The MCA and the i.MX 8X are connected through an I2C interface and an interrupt line. The
microcontroller provides up to 19 general purpose IOs that can be configured with different modes to
provide functionality such as digital input/output or ADC.

Reset control

The MCA, in cooperation with the PMIC, controls the reset line of the i.MX 8X processor. The SYS_
RESET pin is the main reset input of the ConnectCore 8X module. This pin is a pseudo open-drain with
an internal pull up. Asserting the SYS_RESET line low sets the MCA into reset state, and it remains in
this state until the line is de-asserted.
During system initialization, the MCA performs the following actions:
Asserts the PMIC on/off line (SCU_PMIC_ON_REQ) low for a configurable time (0-255 ms with a
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default value of 50ms). This powers the PMIC off, switching off all regulated outputs of the
PMIC. You can disable this power cycle by setting the timer to 0.
Asserts the PMIC on/off line high to power the system on.
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Keeps the reset line of the CPU low for a configurable time.
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ConnectCore® 8X System-on-Module Hardware Reference Manual
The Digi Microcontroller Assist™ hardware
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