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→Power Supply Unit (PSU) and recommended power-up sequence
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== Power Supply Unit (PSU) and recommended power-up sequence ==
MITO 8M Mini SOM simplifies this task by embedding all the needed circuitry. The following picture shows a simplified block diagram of PSU/voltage monitoring circuitry:
[[File:MITO 8MMito8MMini-power-sequence.png | 800px500x500px]]
The PSU is composed of two main blocks:
# SNVS domain signals are pulled-up (unless carrier board circuitry keeps this signal low for any reason)
# CPU_PORn (active-low) is driven low by PMIC
# RTC_RESET_B are internally released after 200ms# VDD_SOC regulator starts and enables the VDD_ARM and PMIC regulators10ms# PMIC initiates power-up sequence needed by iMX8M Mini processor# BOARD_PGOOD goes up when NVCC_3V3 (all CPU I/O power rail) is ready
# CPU_PORn is deasserted after the last regulator to bring the processor out of reset
