NXP Semiconductors K22F series, Reference Manual, Page: 90 / 1407

3.5.4.1 System Register file
This device includes a 32-byte register file that is powered in all power modes. The
System Register file is made up of eight 4-byte registers RFSYS_REGn, where n ranges
from 0 to 7.
Also, it retains contents during low-voltage detect (LVD) events and is only reset during
a power-on reset.
3.5.5 VBAT Register File Configuration
This section summarizes how the module has been configured in the chip.
VBAT register file
Peripheral
bridge
Register
access
Figure 3-24. VBAT Register file configuration
Table 3-35. Reference links to related information
Topic Related module Reference
Full description VBAT register file VBAT register file
System memory map System memory map
Clocking Clock distribution
Power management Power management
3.5.5.1 VBAT register file
This device includes a 32-byte register file that is powered in all power modes and is
powered by VBAT. The VBAT Register file is made up of eight 4-byte registers
RFVBAT_REGn, where n ranges from 0 to 7.
It is only reset during VBAT power-on reset.
Memories and memory interfaces
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
90 NXP Semiconductors