NXP Semiconductors K32 L2A Series, Reference Manual, Page: 1046 / 1379

RTC_CR field descriptions (continued)
Field Description
25–24
CPE
Clock Pin Enable
00 RTC_CLKOUT is disabled.
01 RTC_CLKOUT is enabled on pin PTE0.
10 RTC_CLKOUT is enabled on pin PTE26.
11 Reserved.
23–15
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
14
Reserved
This field is reserved.
It must always be written to 0.
13
SC2P
Oscillator 2pF Load Configure
0 Disable the load.
1 Enable the additional load.
12
SC4P
Oscillator 4pF Load Configure
0 Disable the load.
1 Enable the additional load.
11
SC8P
Oscillator 8pF Load Configure
0 Disable the load.
1 Enable the additional load.
10
SC16P
Oscillator 16pF Load Configure
0 Disable the load.
1 Enable the additional load.
9
CLKO
Clock Output
0 The 32 kHz clock is output to other peripherals.
1 The 32 kHz clock is not output to other peripherals.
8
OSCE
Oscillator Enable
0 32.768 kHz oscillator is disabled.
1 32.768 kHz oscillator is enabled. After setting this bit, wait the oscillator startup time before enabling
the time counter to allow the 32.768 kHz clock time to stabilize.
7
LPOS
LPO Select
When set, the RTC prescaler increments using the LPO 1kHz clock and not the RTC 32kHz crystal clock.
The LPO increments the prescaler from bit TPR[5] (TPR[4:0] are ignored), supporting close to 1 second
increment of the seconds register. Although compensation is supported when clocked from the LPO,
TCR[4:0] of the compensation register are also ignored and only TCR[7:5] set the compensation value
(can overflow after 1020 to 1027 cycles).
0 RTC prescaler increments using 32kHz crystal.
1 RTC prescaler increments using 1kHz LPO, bits [4:0] of the prescaler are bypassed.
6
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
5
CPS
Clock Pin Select
Table continues on the next page...
Register definition
K32 L2A Reference Manual, Rev. 2, 01/2020
1046 NXP Semiconductors