MC68HC908JB8 Datasheet, PDF (242/286 Pages) Motorola, Inc – MICROCONTROLLERS

Computer Operating Properly (COP)
15.8 Low-Power Modes
The WAIT and STOP instructions put the MCU in low-power
consumption standby modes.
15.8.1 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.
15.8.2 Stop Mode
Stop mode turns off the OSCXCLK 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.
15.9 COP Module During Break Mode
The COP is disabled during a break interrupt when V_DD + V_HI is present
on the RST pin.
Technical Data
242
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Computer Operating Properly (COP)
Freescale Semiconductor