Information

Table 14-7. Power mode transition triggers (continued)
Transition # From To Trigger conditions
8 RUN VLLSx PMPROT[AVLLS]=1, PMCTRL[STOPM]=100,
VLLSCTRL[VLLSM]=x (VLLSx), Sleep-now or sleep-on-exit
modes entered with SLEEPDEEP set, which is controlled in
System Control Register in ARM core.
VLLSx RUN Wakeup from enabled LLWU input source or RESET pin
9 VLPR VLLSx PMPROT[AVLLS]=1, PMCTRL[STOPM]=100,
VLLSCTRL[VLLSM]=x (VLLSx), Sleep-now or sleep-on-exit
modes entered with SLEEPDEEP set, which is controlled in
System Control Register in ARM core.
10 RUN LLS PMPROT[ALLS]=1, PMCTRL[STOPM]=011, Sleep-now or
sleep-on-exit modes entered with SLEEPDEEP set, which is
controlled in System Control Register in ARM core.
LLS RUN Wakeup from enabled LLWU input source or RESET pin.
11 VLPR LLS PMPROT[ALLS]=1, PMCTRL[STOPM]=011, Sleep-now or
sleep-on-exit modes entered with SLEEPDEEP set, which is
controlled in System Control Register in ARM core.
1. If debug is enabled, the core clock remains to support debug.
14.4.2 Power mode entry/exit sequencing
When entering or exiting low-power modes, the system must conform to an orderly
sequence to manage transitions safely. The SMC manages the system's entry into and exit
from all power modes. The following diagram illustrates the connections of the SMC
with other system components in the chip that are necessary to sequence the system
through all power modes.
Chapter 14 System Mode Controller
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 271