NXP Semiconductors MKW01Z128, Reference Manual

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Signal m
ultiple
xing
Register
access
Peripheral
bridge
Module signals
Real-time clock
Figure 1-28. RTC configuration
Table 1-43. Reference links to related information
Topic Related module Reference
Full description RTC RTC
System memory map System memory map
Clocking Clock Distribution
Power management Power management
1.8.4.1 RTC Instantiation Information
RTC prescaler is clocked by ERCLK32K.
RTC is reset on POR Only.
RTC_CR[OSCE] can override the configuration of the System OSC, configuring the
OSC for 32 kHz crystal operation in all power modes except VLLS0, and through any
System Reset. When OSCE is enabled, the RTC also overrides the capacitor
configurations.
1.8.4.2 RTC_CLKOUT options
RTC_CLKOUT pin can be driven either with the RTC 1 Hz output or with the
OSCERCLK on-chip clock source. Control for this option is through
SIM_SOPT2[RTCCLKOUTSEL].
When SIM_SOPT2[RTCCLKOUTSEL] = 0, the RTC 1 Hz clock is output is selected on
the RTC_CLKOUT pin. When SIM_SOPT2[RTCCLKOUTSEL] = 1, OSCERCLK
clock is output on the RTC_CLKOUT pin.
Chapter 1 Chip Configuration
MKW01Z128 MCU Reference Manual, Rev. 3, 04/2016
Freescale Semiconductor, Inc. 73