The i.MX 8M Mini is famous for its "Run" and "Suspend" modes. This chapter explains:
The Resource Domain Controller (RDC) is critical. It allows the M4 to lock specific peripherals (e.g., a UART or CAN bus) so the A53 cores cannot touch them, ensuring hard real-time deadlines. imx8mmrm.pdf
This flexibility means a 14x14mm package can support MIPI-DSI (display), MIPI-CSI (camera), PCIe 2.0, Gigabit Ethernet, and 8-channel I2S/TDM audio simultaneously—provided the system designer routes the signals correctly. imx8mmrm.pdf