MC68HC08GP32A Datasheet, PDF (95/258 Pages) Freescale Semiconductor, Inc – Microcontrollers

Computer Operating Properly Module (COP)
9.6 Computer Operating Properly Module (COP)
9.6.1 Wait Mode
The COP remains active during wait mode. If COP is enabled, a reset will occur at COP timeout.
9.6.2 Stop Mode
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 enables the STOP instruction. To prevent inadvertently turning off the
COP with a STOP instruction, disable the STOP instruction by clearing the STOP bit.
9.7 External Interrupt Module (IRQ)
9.7.1 Wait Mode
The IRQ module remains active in wait mode. Clearing the IMASK bit in the IRQ status and control
register enables IRQ CPU interrupt requests to bring the MCU out of wait mode.
9.7.2 Stop Mode
The IRQ module remains active in stop mode. Clearing the IMASK bit in the IRQ status and control
register enables IRQ CPU interrupt requests to bring the MCU out of stop mode.
9.8 Keyboard Interrupt Module (KBI)
9.8.1 Wait Mode
The keyboard module remains active in wait mode. Clearing the IMASKK bit in the keyboard status and
control register enables keyboard interrupt requests to bring the MCU out of wait mode.
9.8.2 Stop Mode
The keyboard module remains active in stop mode. Clearing the IMASKK bit in the keyboard status and
control register enables keyboard interrupt requests to bring the MCU out of stop mode.
9.9 Low-Voltage Inhibit Module (LVI)
9.9.1 Wait Mode
If enabled, the LVI module remains active in wait mode. If enabled to generate resets, the LVI module can
generate a reset and bring the MCU out of wait mode.
9.9.2 Stop Mode
If enabled, the LVI module remains active in stop mode. If enabled to generate resets, the LVI module
can generate a reset and bring the MCU out of stop mode.
MC68HC08GP32A • MC68HC08GP16A Data Sheet, Rev. 1.0
Freescale Semiconductor
95