Datasheet

20.1.2 Modes of operation
This section defines the ACMP operation in wait, stop, and background debug modes.
20.1.2.1 Operation in wait mode
The ACMP continues to operate in wait mode if enabled. The interrupt can wake the
MCU if enabled.
20.1.2.2 Operation in stop mode
The ACMP (including DAC and CMP) continues to operate in stop3 mode if enabled. If
ACIEN is set, a ACMP interrupt can be generated to wake the MCU up from stop3 mode.
If the stop3 is exited by an interrupt, the ACMP setting remains before entering the stop.
If stop3 is exited with a reset, the ACMP goes into its reset.
The user should turn it off if the output is not used as a reference input of ACMP to save
power, because the DAC consumes additional power.
20.1.2.3 Operation in background mode
When the MCU is in active background debug mode, the ACMP continues operating
normally.
20.1.3 Block diagram
The block diagram of the ACMP module is shown in the following figure.
Introduction
MC9S08PA60 Reference Manual, Rev. 1, 9/2012
558 Freescale Semiconductor, Inc.