MC68HC908GT16_07 FREESCALE [Freescale Semiconductor, Inc], MC68HC908GT16_07 Datasheet - Page 119

• Manufacturer Part Number: MC68HC908GT16_07
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Computer Operating Properly Module (COP)
11.6 Computer Operating Properly Module (COP)
11.6.1 Wait Mode
The computer operating properly (COP) module remains active in wait mode. To prevent a COP reset
during wait mode, periodically clear the COP counter in a CPU interrupt routine.
11.6.2 Stop Mode
Stop mode turns off the COPCLK 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 CONFIG1 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.
11.7 External Interrupt Module (IRQ)
11.7.1 Wait Mode
The external interrupt (IRQ) module remains active in wait mode. Clearing the IMASK1 bit in the IRQ
status and control register enables IRQ CPU interrupt requests to bring the MCU out of wait mode.
11.7.2 Stop Mode
The IRQ module remains active in stop mode. Clearing the IMASK1 bit in the IRQ status and control
register enables IRQ CPU interrupt requests to bring the MCU out of stop mode.
11.8 Keyboard Interrupt Module (KBI)
11.8.1 Wait Mode
The keyboard interrupt (KBI) 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.
11.8.2 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.
11.9 Low-Voltage Inhibit Module (LVI)
11.9.1 Wait Mode
If enabled, the low-voltage inhibit (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.
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
Freescale Semiconductor
119