MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 308

• Manufacturer Part Number: MC68HC708XL36
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

COP
Internal Reset
Reset Vector Fetch
COPD
COPRS
COP Control Register
MC68HC708XL36
308
Address:
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. (See
The COPRS signal reflects the state of the COP rate select bit.
The COP control register is located at address $FFFF and overlaps the
reset vector. Writing any value to $FFFF clears the COP counter and
starts a new timeout period. Reading location $FFFF returns the low
byte of the reset vector.
Reset:
Read:
Write:
Freescale Semiconductor, Inc.
For More Information On This Product,
$FFFF
Bit 7
Figure 2. COP Control Register (COPCTL)
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6
COP
5
Configuration Register
Low byte of reset vector
Unaffected by Reset
Clear COP counter
4
3
2
on page 39.)
1
MOTOROLA
4-copopt2_b
Bit 0