MC68HC908GR16 Datasheet, PDF (88/310 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Computer Operating Properly (COP) Module
6.7 Low-Power Modes
The WAIT and STOP instructions put the microcontroller unit (MCU) in low
power-consumption standby modes.
6.7.1 Wait Mode
The COP remains active during wait mode. If COP is enabled, a reset will occur at
COP timeout.
6.7.2 Stop Mode
Stop mode turns off the CGMXCLK 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.
To prevent inadvertently turning off the COP with a STOP instruction, a
configuration option is available that disables the STOP instruction. When the
STOP bit in the configuration register has the STOP instruction disabled, execution
of a STOP instruction results in an illegal opcode reset.
6.8 COP Module During Break Mode
The COP is disabled during a break interrupt when V_TST is present on the RST pin.
Data Sheet
88
Computer Operating Properly (COP) Module
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MC68HC908GR16 — Rev. 1.0
MOTOROLA