MC68HC908GR16A Datasheet, PDF (82/270 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Computer Operating Properly (COP) Module
6.7.2 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.
To prevent inadvertently turning off the COP with a STOP instruction, a configuration option is available
that disables the STOP instruction. When the STOP bit in the configuration register has the STOP
instruction disabled, execution of a STOP instruction results in an illegal opcode reset.
6.8 COP Module During Break Mode
The COP is disabled during a break interrupt when V_TST is present on the RST pin.
MC68HC908GR16A Data Sheet, Rev. 1.0
82
Freescale Semiconductor