mc68hc908jw32 Freescale Semiconductor, Inc, mc68hc908jw32 Datasheet - Page 198

• Manufacturer Part Number: mc68hc908jw32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Computer Operating Properly (COP)
16.6 Monitor Mode
The COP is disabled in monitor mode when V
is present on the IRQ pin or on the RST pin.
TST
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
is present on the RST pin.
TST
MC68HC908JW32 Data Sheet, Rev. 5
198
Freescale Semiconductor