SPRACU5C June 2021 – September 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
It is recommended to connect the main voltage powering the board (3.3 V or 5 V or greater) to the VMON_VSYS pin through an external resistor voltage divider (0.45 V ± 3 %) for early supply failure indication. Consider implementing a noise filter (capacitor) across the voltage divider output connected to the processor input as described in the System Power Supply Monitor Design Guidelines section of the device-specific data sheet.
Connect VMON_1P8_SOC, VMON_1P8_MCU, VMON_3P3_SOC and VMON_3P3_MCU pins directly to their respective supplies. Refer Recommended Operating Conditions section of the device-specific data sheet for the allowed supply voltage range.
VMON_VSYS, VMON_1P8_MCU, VMON_1P8_SOC, VMON_3P3_MCU and VMON_3P3_SOC are fail-safe inputs.
For VMON_VSYS, fail-safe condition is valid when the recommendations in section System Power Supply Monitor Design Guidelines of device-specific data sheet are followed.
For the other VMON pins, the fail-safe condition is valid when the supply voltage connected is within the Recommended Operating Conditions or Absolute Maximum Ratings of device-specific data sheet.