PXD20RM Datasheet, PDF (1111/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

START of mode change
config
N
for target mode
okay?
Y
write ME_<target mode>_MC,
ME_RUN_PC0…7, ME_LP_PC0…7,
and ME_PCTL0…143 registers
write ME_MCTL with target mode
and key
write ME_MCTL with target mode
and inverted key
start timer
S_MTRANS
N
cleared?
Y
stop timer
mode change DONE
N
timer
expired?
Y
write ME_MCTL with current or
SAFE mode and key
write ME_MCTL with current or
SAFE mode and inverted key
Figure 29-26. MC_ME Application Example Flow Diagram
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
29-53