MC68HC908RF2 Datasheet, PDF (166/254 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Computer Operating Properly Module (COP)
11.4.3 COPCTL Write
Writing any value to the COP control register (COPCTL) (see 11.5 COP
Control Register) clears the COP counter and clears stages 12 through
5 of the COP prescaler. Reading the COP control register returns the
reset vector.
11.4.4 Power-On Reset
The power-on reset (POR) circuit clears the COP prescaler 4096
CGMXCLK cycles after power-up.
11.4.5 Internal Reset
An internal reset clears the COP prescaler and the COP counter.
11.4.6 Reset Vector Fetch
A reset vector fetch occurs when the vector address appears on the data
bus. A reset vector fetch clears the COP prescaler.
11.4.7 COPD
The COPD signal reflects the state of the COP disable bit (COPD) in the
configuration register. (See Section 9. Configuration Register
(CONFIG)).
11.4.8 COPRS
The COPRS signal reflects the state of the COP rate select bit (COPRS)
in the configuration register. (See Section 9. Configuration Register
(CONFIG)).
Advance Information
166
Computer Operating Properly Module (COP)
MC68HC908RF2 — Rev. 1
MOTOROLA