mc68hc08qa24 Freescale Semiconductor, Inc, mc68hc08qa24 Datasheet - Page 180

• Manufacturer Part Number: mc68hc08qa24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Computer Operating Properly (COP)
14.8 Low-Power Modes
14.8.1 Wait Mode
14.8.2 Stop Mode
14.9 COP Module During Break Interrupts
Technical Data
178
NOTE:
The following subsections describe the low-power modes.
The COP continues to operate during wait mode. To prevent a COP
reset during wait mode, periodically clear the COP counter in a CPU
interrupt routine.
If the COP is enabled in wait mode, it must be periodically refreshed.
Stop mode turns off the CGMXCLK input to the COP and clears the SIM
counter. 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 MOR register ($001F) (see
Register) enables the STOP instruction. To prevent inadvertently
turning off the COP with a STOP instruction, disable the STOP
instruction by programming the STOP bit to logic 0.
The COP is disabled during a break interrupt when V
DC Electrical
Computer Operating Properly (COP)
Characteristics) is present on the RST pin.
5.4 Mask Option
Freescale Semiconductor
DD
+ V
MC68HC08QA24
HI
(see
23.5