Power supply controller system and semiconductor device

A power supply controller system comprising:

• a power supply portion;
• a first arithmetic processing portion and a second arithmetic processing portion configured to receive power from the power supply portion and operate;
• and
• a first monitoring circuit and a second monitoring circuit configured to monitor an integrity of power supply of the power supply portion,
• wherein the first monitoring circuit includes a first watchdog timer periodically reset by the first arithmetic processing portion and instructs the second arithmetic processing portion to stop an operation thereof when the first watchdog timer is not reset for a first predetermined period of time,
• the second monitoring circuit includes a second watchdog timer periodically reset by the second arithmetic processing portion and instructs the first arithmetic processing portion to stop an operation thereof when the second watchdog timer is not reset for a second predetermined period of time, and
• the first monitoring circuit further includes a third watchdog timer periodically reset by any one of the first arithmetic processing portion and the second arithmetic processing portion and instructs another arithmetic processing portion to stop an operation thereof when the third watchdog timer is not reset for a third predetermined period of time.