NXP Semiconductors KL25 Series - RTC Clocking; LPTMR Clocking

SIM_COPCTRL[COPCLKS]
COP clock
Bus clock
LPO
Figure 5-2. COP clock generation
5.7.3 RTC clocking
The RTC module can be clocked as shown in the following figure.
NOTE
The chosen clock must remain enabled if the RTC is to
continue operating in all required low-power modes.
SIM_SOPT1[OSC32KSEL]
OSC32KCLK
RTC_CLKIN
LPO
ERCLK32K
(to RTC)
Figure 5-3. RTC clock generation
5.7.4 LPTMR clocking
The prescaler and glitch filters in each of the LPTMRx modules can be clocked as shown
in the following figure.
NOTE
The chosen clock must remain enabled if the LPTMRx is to
continue operating in all required low-power modes.
Chapter 5 Clock Distribution
KL25 Sub-Family Reference Manual, Rev. 3, September 2012
Freescale Semiconductor, Inc. 123