Mode Entry Module (MC_ME)MPC5606S Microcontroller Reference Manual, Rev. 7Freescale Semiconductor 947• Power Domain #2 Switch-Off• Power Domain #2 Switch-On• The device consumption is less than the pre-defined threshold value (i.e. the S_DC bit of theME_GS register is 0).If the target mode is Standby, the main voltage regulator is not switched off by the MC_ME and theStandby request is asserted after the above processes have completed upon which the MC_PCU takescontrol of the main regulator. As the MC_PCU needs the 16MHz int. RC osc., the fast internal RCoscillator (16MHz) remains active until all the Standby steps are executed by the MC_PCU after which itmay be switched off depending on the FIRCON bit of the ME_STANDBY_MC register.25.4.3.22 Current mode updateThe current mode status bit field S_CURRENT_MODE of the ME_GS register is updated with the targetmode bit field TARGET_MODE of the ME_MCTL register when:• All the updated status bits in the ME_GS register match the configuration specified in theME_ mode>_MC register• Power sequences are done• Clock disable/enable process is finished• Processor low-power mode (halt/stop) entry and exit processes are finishedSoftware can monitor the mode transition status by reading the S_MTRANS bit of the ME_GS register.The mode transition latency can differ from one mode to another depending on the resources’ availabilitybefore the new mode request and the target mode’s requirements.
