Copctl Write; Power-On Reset; Internal Reset; Reset Vector Fetch - Motorola MC68HC908GP32 Technical Data Manual

Computer Operating Properly (COP)

9.4.3 COPCTL Write

9.4.4 Power-On Reset

9.4.5 Internal Reset

9.4.6 Reset Vector Fetch

9.4.7 COPD (COP Disable)

9.4.8 COPRS (COP Rate Select)

Technical Data
144
Freescale Semiconductor, Inc.
Writing any value to the COP control register (COPCTL)
Control Register) clears the COP counter and clears bits 12 through 5
of the prescaler. Reading the COP control register returns the low byte
of the reset vector.
The power-on reset (POR) circuit clears the COP prescaler 4096
CGMXCLK cycles after power-up.
An internal reset clears the COP prescaler and the COP counter.
A reset vector fetch occurs when the vector address appears on the data
bus. A reset vector fetch clears the COP prescaler.
The COPD signal reflects the state of the COP disable bit (COPD) in the
configuration register.
(CONFIG).)
The COPRS signal reflects the state of the COP rate select bit (COPRS)
in the configuration register.
(CONFIG).)
Computer Operating Properly (COP)
For More Information On This Product,
Go to: www.freescale.com
(See Section 8. Configuration Register
(See Section 8. Configuration Register
MC68HC908GP32
(see 9.5 COP
MC68HC08GP32 Rev. 6
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