mc68hc908mr24 Freescale Semiconductor, Inc, mc68hc908mr24 Datasheet - Page 340

• Manufacturer Part Number: mc68hc908mr24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Computer Operating Properly (COP)
16.4.4 Internal Reset
16.4.5 Reset Vector Fetch
16.4.6 COPD (COP Disable)
16.5 COP Control Register
Advance Information
340
Address:
An internal reset clears the SIM counter and the COP counter.
A reset vector fetch occurs when the vector address appears on the data
bus. A reset vector fetch clears the SIM counter.
The COPD signal reflects the state of the COP disable bit (COPD) in the
configuration register (CONFIG). (See
Register
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:
$FFFF
Computer Operating Properly (COP)
Bit 7
(CONFIG).)
Figure 16-3. COP Control Register (COPCTL)
6
5
Low byte of reset vector
Unaffected by reset
Clear COP counter
4
Section 5. Configuration
3
MC68HC908MR24
Freescale Semiconductor
2
1
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Rev. 4.1
Bit 0