MC68HC908LJ24 Datasheet, PDF (107/464 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Oscillator (OSC)
Oscillator During Break Mode
7.6.1 Wait Mode
The WAIT instruction has no effect on the oscillator module. CGMXCLK,
CGMRCLK, and ICLK continues to drive the MCU modules.
7.6.2 Stop Mode
The STOP instruction clears the SIMOSCEN signal, and hence the
CGMXCLK (and CGMRCLK) clock stops running. For continuous
CGMXCLK operation in stop mode, set the STOP_XCLKEN to logic 1
before entering stop mode. Continuous CGMXCLK operation in stop
mode allows the RTC module to generate interrupts to wake up the CPU.
By default, the internal RC oscillator clock, ICLK, continues to run in stop
mode. To disable the ICLK in stop mode, set the STOP_IRCDIS bit to
logic 1 before entering stop mode.
7.7 Oscillator During Break Mode
The oscillator circuits continue to drive CGMXCLK, CGMRCLK, and
ICLK when the device enters the break state.
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
Oscillator (OSC)
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Data Sheet
107