Information

SMC_PMCTRL field descriptions (continued)
Field Description
6–5
RUNM
Run Mode Control
When written, this field causes entry into the selected run mode. Writes to this field are blocked if the
protection level has not been enabled using the PMPROT register. This field is cleared by hardware on
any exit to normal RUN mode.
NOTE: RUNM should only be set to VLPR when PMSTAT=RUN. Once written to VLPR, RUNM should
not be written back to RUN until PMSTAT=VLPR.
NOTE: RUNM should only be set to RUN when PMSTAT=VLPR. Once written to RUN, RUNM should
not be written back to VLPR until PMSTAT=RUN.
00 Normal run mode (RUN)
01 Reserved
10 Very low power run mode (VLPR)
11 Reserved
4
Reserved
This read-only field is reserved and always has the value zero.
3
STOPA
Stop Aborted
When set, this read-only status bit indicates an interrupt or reset occured during the previous stop mode
entry sequence, preventing the system from entering that mode. This bit is cleared by hardware at the
beginning of any stop mode entry sequence and is set if the sequence was aborted.
0 The previous stop mode entry was successsful.
1 The previous stop mode entry was aborted.
2–0
STOPM
Stop Mode Control
When written, this field controls entry into the selected stop mode when sleep-now or sleep-on-exit mode
is entered with SLEEPDEEP=1 . Writes to this field are blocked if the protection level has not been
enabled using the PMPROT register. After any system reset, this field is cleared by hardware on any
successful write to the PMPROT register.
NOTE: When set to VLLSx, the VLLSM bits in the VLLSCTRL register is used to further select the
particular VLLS sub-mode which will be entered.
NOTE:
000 Normal stop (STOP)
001 Reserved
010 Very low power stop (VLPS)
011 Low leakage stop (LLS)
100 Very low leakage stop (VLLSx)
101 Reserved
110 Reseved
111 Reserved
Memory map and register descriptions
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
266 Freescale Semiconductor, Inc.