PXD20RM Datasheet, PDF (1106/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Start
Target Mode Request
Clock Sources
Switch-On
Write ME_MCTL register
SAFE mode request
interrupt/wakeup event
Main VREG
Switch-On
Peripheral Clocks
Disable
Processor
Low-Power
Entry
Processor &
Memory
Clock Disable
Main VREG
Dependent
Clock Sources
Switch-On
FLASH
Switch-On
Power Domain
Switch-On
Pad
Outputs On
System Clock
Switching
Processor &
Memory
Clock Enable
Processor
Low-Power
Exit
Peripheral Clocks
Enable
Clock Sources Without
Dependencies Switch-Off
FLASH Power Domain
Switch-Off
Switch-Off
PAD
Outputs Off
Clock Sources With
Dependencies Switch-Off
Main VREG ^N
Switch-Off
Target
STANDBY
Y _STANDBY
Request
29-48
Current Mode Update
S_MTRANS = ‘
End
Figure 29-25. MC_ME Transition Diagram
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor