22.3.21 Sleep Mode Operation

The Error Controller needs a clock and does not function in sleep modes without a clock. The only sleep mode where the ERRCTRL is clocked is in IDLE. The ERRCTRL is, therefore, not able to register or act on errors detected in POWERDOWN or STANDBY sleep modes. As a result, diagnostic coverage in these two sleep modes is limited or absent. The higher-ranking system is assumed to be designed to accept that the diagnostic coverage from the MCU is lower when the MCU is in a sleep mode.

The ERRCTRL will resume ordinary operation when waking from POWERDOWN or STANDBY.

The heartbeat stops in POWERDOWN and STANDBY sleep modes.