PMC_LVDSC1 field descriptions (continued)
Field Description
6
LVDACK
Low-Voltage Detect Acknowledge
This write-only field is used to acknowledge low voltage detection errors. Write 1 to clear LVDF. Reads
always return 0.
5
LVDIE
Low-Voltage Detect Interrupt Enable
Enables hardware interrupt requests for LVDF.
0 Hardware interrupt disabled (use polling)
1 Request a hardware interrupt when LVDF = 1
4
LVDRE
Low-Voltage Detect Reset Enable
This write-once bit enables LVDF events to generate a hardware reset. Additional writes are ignored.
0 LVDF does not generate hardware resets
1 Force an MCU reset when LVDF = 1
3–2
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
LVDV Low-Voltage Detect Voltage Select
Selects the LVD trip point voltage (V
LVD
).
00 Low trip point selected (V
LVD
= V
LVDL
)
01 High trip point selected (V
LVD
= V
LVDH
)
10 Reserved
11 Reserved
16.5.2 Low Voltage Detect Status And Control 2 register
(PMC_LVDSC2)
This register contains status and control bits to support the low voltage warning function.
While the device is in the very low power or low leakage modes, the LVD system is
disabled regardless of LVDSC2 settings.
See the device's data sheet for the exact LVD trip voltages.
NOTE
The LVW trip voltages depend on LVWV and LVDV.
NOTE
LVWV is reset solely on a POR Only event. The other fields of
the register are reset on Chip Reset Not VLLS. For more
information about these reset types, refer to the Reset section
details.
Chapter 16 Power Management Controller (PMC)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 375
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