NXP Semiconductors K22F series, Reference Manual, Page: 175 / 1407

6.2.3.3 Chip POR not VLLS
The Chip POR not VLLS reset asserts on POR and LVD reset sources. It resets parts of
the SMC and SIM. It also resets the LPTMR.
The Chip POR not VLLS reset also causes these resets to occur: Chip POR, Chip Reset
not VLLS, and Chip Reset (including Early Chip Reset).
6.2.3.4 Chip POR
The Chip POR asserts on POR, LVD, and VLLS Wakeup reset sources. It resets the
Reset Pin Filter registers and parts of the SIM and MCG.
The Chip POR also causes the Chip Reset (including Early Chip Reset) to occur.
6.2.3.5 Chip Reset not VLLS
The Chip Reset not VLLS reset asserts on all reset sources except a VLLS Wakeup that
does not occur via the RESET_b pin. It resets parts of the SMC, LLWU, and other
modules that remain powered during VLLS mode.
The Chip Reset not VLLS reset also causes the Chip Reset (including Early Chip Reset)
to occur.
6.2.3.6 Early Chip Reset
The Early Chip Reset asserts on all reset sources. It resets only the flash memory module.
It negates before flash memory initialization begins ("earlier" than when the Chip Reset
negates).
6.2.3.7 Chip Reset
Chip Reset asserts on all reset sources and only negates after flash initialization has
completed and the RESET_b pin has also negated. It resets the remaining modules (the
modules not reset by other reset types).
Chapter 6 Reset and Boot
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 175