NXP Semiconductors K22F series User Manual

Table 15-2. Power mode transition triggers (continued)
Transition # From To Trigger conditions
10 RUN LLSx PMPROT[ALLS]=1, PMCTRL[STOPM]=011,
STOPCTRL[LLSM]=x (LLSx), Sleep-now or sleep-on-exit
modes entered with SLEEPDEEP set, which is controlled in
System Control Register in ARM core.
LLSx RUN Wakeup from enabled LLWU input source and LLSx mode
was entered directly from RUN or
RESET pin.
11 VLPR LLSx 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.
LLSx VLPR Wakeup from enabled LLWU input source and LLSx mode
was entered directly from VLPR
NOTE:
If LLSx was entered directly from RUN, hardware will
not allow this transition and will force exit back to
RUN
12 RUN HSRUN Set PMPROT[AHSRUN]=1, PMCTRL[RUNM]=11.
HSRUN RUN Set PMCTRL[RUNM]=00 or
Reset
1. If debug is enabled, the core clock remains to support debug.
2. If PMCTRL[STOPM]=000 and STOPCTRL[PSTOPO]=01 or 10, then only a Partial Stop mode is entered instead of STOP
3. If PMCTRL[STOPM]=000 and STOPCTRL[PSTOPO]=00, then VLPS mode is entered instead of STOP. If
PMCTRL[STOPM]=000 and STOPCTRL[PSTOPO]=01 or 10, then only a Partial Stop mode is entered instead of VLPS
15.4.2 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. This 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.
Figure 15-2. Low-power system components and connections
15.4.2.1
Stop mode entry sequence
Entry into a low-power stop mode (Stop, VLPS, LLS, VLLSx) is initiated by a CPU
executing the WFI instruction. After the instruction is executed, the following sequence
occurs:
1. The CPU clock is gated off immediately.
Functional description
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
362 NXP Semiconductors

NXP Semiconductors K22F series Specifications

General

Brand	NXP Semiconductors
Model	K22F series
Category	Controller
Language	English