NXP Semiconductors K32 L2A Series, Reference Manual, Page: 987 / 1379

Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
0
VLPO
Reserved
BGEN
ACKISO
REGONS
Reserved
BGBE
W
w1c
Reset 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0
PMC_REGSC field descriptions
Field Description
31–7
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
6
VLPO
VLPx Option
When used in conjunction with BGEN, this bit allows additional clock sources and higher frequency
operation (at the cost of higher power) to be selected during VLPx modes.
0 Operating frequencies and SCG clocking modes are restricted during VLPx modes as listed in the
Power Management chapter.
1 If BGEN is also set, operating frequencies and SCG clocking modes are unrestricted during VLPx
modes. Note that flash access frequency is still restricted however.
5
Reserved
This field is reserved.
4
BGEN
Bandgap Enable In VLPx Operation
BGEN controls whether the bandgap is enabled in lower power modes of operation (VLPx, LLS, and
VLLSx). When on-chip peripherals require the bandgap voltage reference in low power modes of
operation, set BGEN to continue to enable the bandgap operation.
NOTE: When the bandgap voltage reference is not needed in low power modes, clear BGEN to avoid
excess power consumption.
0 Bandgap voltage reference is disabled in VLPx , LLS , and VLLSx modes.
1 Bandgap voltage reference is enabled in VLPx , LLS , and VLLSx modes.
3
ACKISO
Acknowledge Isolation
Reading this field indicates whether certain peripherals and the I/O pads are in a latched state as a result
of having been in a VLLS mode. Writing 1 to this field when it is set releases the I/O pads and certain
peripherals to their normal run mode state.
NOTE: After recovering from a VLLS mode, user should restore chip configuration before clearing
ACKISO. In particular, pin configuration for enabled LLWU wakeup pins should be restored to
avoid any LLWU flag from being falsely set when ACKISO is cleared.
Table continues on the next page...
Chapter 37 Power Management Controller (PMC)
K32 L2A Reference Manual, Rev. 2, 01/2020
NXP Semiconductors 987