MC68HC908JW32_09 Datasheet, PDF (200/232 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Computer Operating Properly (COP)
16.6 Monitor Mode
The COP is disabled in monitor mode when V_TST is present on the IRQ pin or on the RST pin.
16.7 Low-Power Modes
The WAIT and STOP instructions put the MCU in low-power consumption standby modes.
16.7.1 Wait Mode
The COP remains active during wait mode. To prevent a COP reset during wait mode, periodically clear
the COP counter in a CPU interrupt routine.
16.7.2 Stop Mode
Stop mode turns off the CGMRCLK 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.
16.8 COP Module During Break Mode
The COP is disabled during a break interrupt when V_TST is present on the RST pin.
MC68HC908JW32 Data Sheet, Rev. 6
200
Freescale Semiconductor