The LOCKUP condition causes a system reset and also causes the RCM's
SRS1[LOCKUP] bit to set.
6.2.2.10 EzPort reset
The EzPort supports a system reset request via EzPort signaling. The EzPort generates a
system reset request following execution of a Reset Chip (RESET) command via the
EzPort interface. This method of reset allows the chip to boot from flash memory after it
has been programmed by an external source. The EzPort is enabled or disabled by the
EZP_CS pin.
An EzPort reset causes the RCM's SRS1[EZPT] bit to set.
6.2.2.11 MDM-AP system reset request
Set the system reset request bit in the MDM-AP control register to initiate a system reset.
This is the primary method for resets via the JTAG/SWD interface. The system reset is
held until this bit is cleared.
Set the core hold reset bit in the MDM-AP control register to hold the core in reset as the
rest of the chip comes out of system reset.
6.2.3
MCU Resets
A variety of resets are generated by the MCU to reset different modules.
6.2.3.1
VBAT POR
The VBAT POR asserts on a VBAT POR reset source. It affects only the modules within
the VBAT power domain: RTC and VBAT Register File. These modules are not affected
by the other reset types.
6.2.3.2
POR Only
The POR Only reset asserts on the POR reset source only. It resets the PMC and System
Register File.
The POR Only reset also causes all other reset types (except VBAT POR) to occur.
Reset
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
174 NXP Semiconductors
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