MC68HC908AZ60 Datasheet, PDF (186/480 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Computer Operating Properly Module (COP)
Low-Power Modes
The WAIT and STOP instructions put the MCU in low power-consump-
tion standby modes.
Wait Mode
The COP remains active in wait mode. To prevent a COP reset during
wait mode, periodically clear the COP counter in a CPU interrupt routine.
Stop Mode
Stop mode turns off the CGMXCLK input to the COP and clears the COP
prescaler. Service the COP immediately before entering or after exiting
stop mode to ensure a full COP timeout period after entering or exiting
stop mode.
The STOP bit in the configuration register (CONFIG) enables the STOP
instruction. To prevent inadvertently turning off the COP with a STOP
instruction, disable the STOP instruction by clearing the STOP bit.
COP Module During Break Interrupts
The COP is disabled during a break interrupt when V_Hi is present on the
RST pin.
MC68HC908AZ60 — Rev 2.0
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Computer Operating Properly Module (COP)
6-cop
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